Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
[exim.git] / doc / doc-misc / WishList
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929ba01c 1$Cambridge: exim/doc/doc-misc/WishList,v 1.59 2006/02/21 16:24:19 ph10 Exp $
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2
3EXIM 4 WISH LIST
4----------------
5
6Even when it was first released, Exim 4 had a Wish List because not all the
7things suggested for it were implemented. The list has not stopped growing...
8
9Another reason it is so long is that I have retained some items from the Exim 3
10Wish List that never got implemented, but which seem reasonable possibilities
11for later addition to Exim 4.
12
13I have guessed at the amount of work involved, and categorized the items as
14Tiny, Small, Medium, Large, or Unknown. The guesses are not based on any
15detailed investigation, so must be taken as very rough.
16
17
18------------------------------------------------------------------------------
19------------------------------------------------------------------------------
20----- Retained from the Exim 3 Wish List ------
21------------------------------------------------------------------------------
22------------------------------------------------------------------------------
23
24(10) 13-Jul-98 M more flexibility for pipe returns
25Ben Smithurst
26
27The ability to specify more precisely what happens concerning the return code
28from the pipe and the presence/absence of STDOUT/STDERR is requested. The
29particular configuration that was requested was:
30
31> if the command exited EX_OK, *and* produced nothing on STDOUT or
32> STDERR, it succeeded...
33> if the command exited EX_TEMPFAIL, defer, regardless of
34> STDOUT/STDERR...
35> otherwise freeze the message (this will get my attention by way of
36> freeze_tell_mailmaster)...
37------------------------------------------------------------------------------
38
39(11) 17-Jul-98 G support for DSN
40Andy Mell
41
42It is unclear to me how this should work in the presence of aliases and
43forwarding. Local deliveries would have to explicitly configured as deliveries
44or relaying or whatever. A substantial amount of code is probably needed.
45
46Jeffrey Goldberg
47I have nothing to add except to say that for many of the reasons you've
48stated, I don't think that DSN is coherent enough to be worth the effort
49to implement.
50
51Another comment:
52
53 I thought the RFC was pretty clear on this. In a nutshell, if the
54 delivery rewrites the envelope from address, it's considered a
55 terminal delivery (i.e. delivery to a mailing list exploder), otherwise
56 treat it as a forwarding operation (the /etc/aliases case). I would
57 treat a .forward expansion as a final delivery event (it got to the
58 user as far as the MTA is concerned).
59
60 Yes, we need the DSN syntax. We also require the complete semantics of
61 NOTIFY=SUCCESS,FAILURE for our application to work.
62
63 Electronic Bill Presentment is really going to push the need for
64 DSN support in MTAs. We just don't want to get stuck in a situation
65 where we're faced with a non-DSN-aware MTA when we go to install
66 our bill/statement engine, thus our interest in what the MTA vendors
67 are planning to do about DSN.
68------------------------------------------------------------------------------
69
70(41) 14-Oct-98 M Find a way of modifying header lines
71Oliver Smith
72
73The problem with header_remove followed by header_add is that you can't refer
74to the previous value of the header when adding a replacement. This could be
4990831e 75solved with a replace_header option. See also Exim 4/333.
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76------------------------------------------------------------------------------
77
78(43) 15-Oct-98 M Sender rewrite *after* SMTP incoming checks
79Andreas Edler
80
81The anti-relaying check happens after the sender has been rewritten; there are
82times when it would be helpful to do the check on the original sender, not on
83the rewritten one. Quite how to configure this I'm not sure.
84
85A related suggestion (from Steve Sargent) is to retain the original sender
86address and make it accessible somehow.
87------------------------------------------------------------------------------
88
89(46) 20-Oct-98 L SMTP protocol hooks
90Malcolm Ray
91
92"But there are enough broken SMTP implementations to make me wonder whether
93there isn't a case for providing hooks for tweaking the SMTP transport's
94protocol exchange. Something which would allow me to say things like 'if, when
95talking to lame.example.com, you get a 251 response to a MAIL command, rewrite
96the response to 501 before continuing'."
97------------------------------------------------------------------------------
98
99(50) 13-Nov-98 M A "Focus" option for eximon
100Frank Elsner
101
102This is the opposite of "Hide"; it just displays a certain subset. Hmm. Could
103something clever be done with regular expressions?
104------------------------------------------------------------------------------
105
106(61) 22-Dec-98 M Send failed error messages to somebody
107Harald Meland
108
109With sendmail, the failed error message is made into a error message,
110with both envelope sender and recipient set to MAILER-DAEMON. The
111original, bogus-envelope-sender message is then available to whoever
112receives MAILER-DAEMON's mail. A more flexible approach would be to
113specify a specific recipient.
114------------------------------------------------------------------------------
115
116(81) 01-Mar-99 M Addition of Content-MD5 support
117Martin Hamilton
118
119Martin supplied a suggested patch at
120http://www.net.lut.ac.uk/~martin/antispam/exim-hacks/
121------------------------------------------------------------------------------
122
123(85) 15-Mar-99 M ability to rewrite addresses in non-standard headers
124Dave Lewney
125John Holman
126
4990831e 127Such as "return-receipt-to". See also 41. See also Exim 4/333.
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128------------------------------------------------------------------------------
129
130(90) 21-Apr-99 M change wild prefix/suffix greediness
131Ben Smithurst
132
133Currently, when prefix or suffix containing * is set on a director, and the
134fixed part occurs more than once in a local part, the length of the prefix or
135suffix is maximized. For example, with suffix = -* and a local part of
136foo-bar-baz the suffix is taken as bar-baz, leaving the local part as foo.
137An option is proposed to invert this rule.
138------------------------------------------------------------------------------
139
140(91) 26-Apr-99 S make queue_run_in_order to newest first
141"Andreas M. Kirchwitz"
142
143The tidiest thing would be to have queue_run_order={random,oldest,newest},
144and make queue_run_in_order obsolete.
145------------------------------------------------------------------------------
146
147(93) 04-May-1999 L fallback_transport
148
149This would be a generic transport option, specifying a different transport to
150be used if the first one failed. Failed hard, or failed soft? Or an option?
151And if failed hard, is a bounce message sent as well, or not? There are uid
152issues. Remote delivery would have to be done always in a subprocess so that
153the main process could retain privilege in case the fallback transport was
154local. That could be conditional. That's why this is labelled "Large". Some of
155the things people want to do with this can be done by variations in the
156routers, e.g. use $message_age to switch routers.
157------------------------------------------------------------------------------
158
159(94) 13-May-1999 M message to go with -Mg
160Dave Holland
161Alan Thew
162
163So the admin can pass back a reason.
164------------------------------------------------------------------------------
165
166(99) 28-May-1999 M header to list failures for syntax_errors_to
167mark david mcCreary
168
169"I use the syntax_errors_to feature to email a copy of the error message.
170It would be helpful to have the X-Failed-Receipients header in there,
171identifying which addreses(s) are the problem, so that I don't have to
172parse the body of the email message to figure out which addresses."
173------------------------------------------------------------------------------
174
175(100) 04-Jun-1999 S admin_users option, like trusted_users
176Paul Mansfield
177------------------------------------------------------------------------------
178
179(102) 21-Jun-1999 M expanded basic variables
180Julian King
181
182Oh, and a wishlist entry, qualify_domain, and preferably other variables
183can be set with a $lookup in the first part of the exim configuration
184file, perhaps by an equivalent to backticks in shell script ("`command`")?
185------------------------------------------------------------------------------
186
187(105) 28-Jun-1999 M MIME-format bounce messages
188Paul Makepeace
189
190"Is there any work going/gone on/planned to enable exim to report delivery
191status notifications using RFC1892 multipart/report MIME messages? It would be
192great to have errors reported in a message/rfc822 attachment."
193
194Jeffrey Goldberg
195"I like plain bounces, so would hope that if you do this, that it be
196configurable. I think that even for those who want it, it shouldn't be very
197high on the wish list priority."
198
199Other suggestions: toggle for bounces/warnings; override max_return for
200certain addresses; use plain text if original not MIME. See Paul's hack
201for background of what to do.
202
203Nigel suggests using a specially named autoreply transport to generate bounces;
204people could then replace this with another transport (e.g. pipe) if they want
205to customize it themselves.
206
207Eli Chen posted an unconditional patch for 3.32 that does some of this work.
208That could form a basis.
209------------------------------------------------------------------------------
210
211(107) 12-Jul-1999 S defer transport at given load level
212Marc Haber
213
214------------------------------------------------------------------------------
215
216(108) 16-Jul-1999 S remote sort by numbers of recipients
217mark david mcCreary
218
219In the absence of remote_sort, sort remote domains by the number of recipients
220in each.
221------------------------------------------------------------------------------
222
223(114) 11-Nov-1999 S List of possible outgoing interfaces
224
225Allow the smtp "interface" option to be a list: try them in turn until one
226is found to work. Also allow masks to specify a range of addresses.
227------------------------------------------------------------------------------
228
229(123) 23-Dec-1999 L Use AUTH + TURN for dial-in hosts
230Andrew Tverdokhleb
231
232The way to do this would be to have Exim deliver messages into per-host
233directories in, say, BSMTP format. Accept TURN if authenticated, and cause it
234to run a helper program that is passed the socket in order to deliver the mail.
235Provide a helper program!
236------------------------------------------------------------------------------
237
238(125) 04-Jan-2000 L Use shared memory segment for queue list
239Theo Schlossnagle
240
241The idea is that a queue-runner that finds no existing shared segment should
242create one (if configured - possibly some fixed size) and all Exim processes
243should maintain a list of messages in it, thereby saving on directory scans
244when there are lots of messages. This needs a lot of careful thought to try to
245eliminate any possibility of data loss. The interlocking could be quite tricky.
246Further posters suggested using a db file to hold the list. See also 127.
247------------------------------------------------------------------------------
248
249(129) 14-Jan-2000 L Dynamically loadable lookup modules
250Steve Haslam
251
252Suggested patch provided.
253------------------------------------------------------------------------------
254
255(131) 17-Jan-2000 T Facility for assuming existence for EACCES
256Peter Radcliffe
257
258The opposite option for "+" in require_files: assume existence if cannot
259peer into the directory (+ assumes non-existence).
260------------------------------------------------------------------------------
261
262(131) 29-Feb-2000 M? Control total number of outgoing SMTP calls
263Brian White
264
265This is for hosts with slow connections. Could some modification of
266serialize_hosts be used for this? Or maybe use a semaphore? They seem to
267be quite widely available.
268------------------------------------------------------------------------------
269
270(132) 01-Mar-2000 S Lookup host name from outgoing interface
271Vadim Vygonets
272
273Instead of primary_hostname, look up the name for the interface that is being
274used for sending. Suggested patch supplied, but this should be an option of the
275smtp transport.
276------------------------------------------------------------------------------
277
278(133) 06-Mar-2000 S Filter option not to log "previously sent"
279Bruce Bowler
280
281This is when using the "log" option of the autoreply driver.
282------------------------------------------------------------------------------
283
284(134) 09-Mar-2000 S Option to remove attachments when bouncing
285------------------------------------------------------------------------------
286
287(136) 13-Mar-2000 S/M Option for aliasfile to suppress "me too"
288
289Could be tricky determining who "me" is.
290------------------------------------------------------------------------------
291
292(143) 08-May-2000 S Make quota_warn_threshold into a list
293David Carter
294
295So several warnings could be generated as the mailbox got bigger and bigger.
296------------------------------------------------------------------------------
297
298(146) 15-May-2000 M Allow SMTP error codes in retry rules
299
300This would allow special handling of certain errors from certain hosts. In
301particular, it would allow failing of certain 4xx codes.
302
303This is now available for 4xx responses to RCPT commands. Is anything more
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304needed? Apparently, yes; there's been a request for a similar feature for MAIL
305commands.
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306------------------------------------------------------------------------------
307
308(148) 15-May-2000 S Warn recipient if message rejected for quota excession.
309Heinz Ekker
310
311Maybe not all that small, because the possibility of retrying must be taken
312into account.
313------------------------------------------------------------------------------
314
315(149) 19-May-2000 L Make added headers visible in filters and other places
316Hans Morten Kind
317
318Headers added by directors/routers are not visible in subsequent processing.
319This is a request to make them visible. What about removed headers? This could
320be tricky to specify, hence the L.
321
322A separate but related issue is the effect of headers added by "unseen"
323directors. These are documented in chapter 19 as not being accumulated. Should
4990831e 324any change be made? See also Exim 4/333.
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325------------------------------------------------------------------------------
326
327(155) 16-Jun-2000 M Special handling for certain hosts
328mark david mcCreary
329
330A means of changing the transport depending on the host name/IP of the most
331preferred MX record so that all domains that route to certain hosts can be
332handled specially. Maybe this could be a variable that is available in the
333expansion of the "transport" option.
334------------------------------------------------------------------------------
335
336(158) 29-Jun-2000 S Configure "From" in bounces
337Ben Parker
338
339Cf Reply-To.
340------------------------------------------------------------------------------
341
342(159) 07-Jul-2000 M Keep messages for fixed time
343Gary Palmer
344
345An option to keep messages on the queue for a specified time, even if all their
346destination hosts have timed out.
347------------------------------------------------------------------------------
348
349(164) 17-Aug-2000 S sender_unqualified_auth_hosts
350
351To allow authenticated hosts to send unqualified addresses. Presumably it
352needs received_... as well.
353------------------------------------------------------------------------------
354
355(167) 05-Sep-2000 L Support for ODBC
356
357This would allow access to databases that don't have native support built into
358Exim. See http://www.openlinksw.com/info/docs/rel3doc/unix/odbcsdk.htm
359------------------------------------------------------------------------------
360
361(168) 06-Sep-2000 M Deliver messages that alias to nothing to a given address
362Dr ZP Han
363
364If other people are managing alias lists, and one is empty, bounce that
365delivery to a given address rather than freezing the message. Use the errors_to
366address?
367------------------------------------------------------------------------------
368
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369(173) 18-Sep-2000 S A way of doing lsearches with EOL terminated keys
370Jason Robertson
371
372This is for looking up things like subject contents. Probably need an option to
373exim_dbmbuild to make them into DBM files.
374------------------------------------------------------------------------------
375
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376(181) 10-Nov-2000 S Compile-time options for ignoring Sendmail options
377
378So that new ones could be accommodated easily.
379------------------------------------------------------------------------------
380
381(183) 04-Dec-2000 L dns_means_nonexist_after
382Dave C.
383
384In other words, wait a bit before giving up. This needs a mechanism for
385remembering, which is not currently available. To be borne in mind for the
386future.
387------------------------------------------------------------------------------
388
389(184) 04-Dec-2000 M Log more details of local caller
390J. Nick Koston
391
392"I was wondering if it was possible for exim to log the parent pid's cwd and
393exe when it is called from a script/invoked by actually running /usr/sbin/exim
394or /usr/sbin/sendmail." Question: is this information actually/easily
395available to Exim? Needs investigation.
396------------------------------------------------------------------------------
397
398(186) 19-Dec-2000 S A simple utility to reset a retry time
399Marc Haber
400
401Basically, to do what exim_fixdb "delete" can do, but straightforwardly. There
402could be an interface from eximon.
403------------------------------------------------------------------------------
404
405(187) 02-Jan-2001 M Wildcarding in headers_remove
406Tamas TEVESZ
407
408What I'd like to see is it to handle globs (or regexps, but i'm not sure this
409latter would worth the hassle), in a way like:
410
411 headers_remove = "X-*:Additional-header"
412------------------------------------------------------------------------------
413
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414(190) 03-Jan-2001 M Multiple message operations in eximon
415------------------------------------------------------------------------------
416
417(195) 19-Mar-2001 T TCP window size
418
419TCP window size for receiving/sending, SMTP client/server.
420------------------------------------------------------------------------------
421------------------------------------------------------------------------------
422
423
424
425------------------------------------------------------------------------------
426------------------------------------------------------------------------------
427----- Things that didn't make it into Exim 4 ------
428------------------------------------------------------------------------------
429------------------------------------------------------------------------------
430
431. An option to send messages to postmaster when ignore_errmsg_errors_after
432times out.
433
434. When an address is being routed, its constituents are in $local_part and
435$domain, but there is currently no variable that contains the whole thing. It
436could be put into $recipient, but that risks confusion with $recipients
437(which is available in system filters). Maybe $address could be used?
438
439. The ability to relay to host X without knowing all the domains that host X
440might have. At ACL time, one would need to verify the recipient, and determine
441that it routed to host X.
442
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443. People want to change the wording of messages; can we find an efficient way
444of allowing this? (Maybe put all messages into a separate module?) The problem
445is not in the messages themselves, but in the values that get inserted into
446messages. Would have to invent a new kind of function that used identified
447values rather than positional ones. Use GNU gettext?
448
449. Invent lf_hosts for those that may use LF without CR. Any other RFC
450things we need to worry about?
451
452. A user would really like to see something similar, perhaps with
453"ID=$authenticated_id", similar to "helo=" and "ident=" in the default received
454header. BUT there are security issues. Maybe give it as a commented out option
455in the default configuration?
456
457. Consider expanding further options that take integer values. What about
458smtp_xxx options for different limits at different times of day (for example)?
459What about tls_advertise_hosts (so can look at incoming IP/port)?
460
461. How about a "hold hosts" option (cf hold_domains) to hold delivery to certain
462hosts?
463
464. Allow user filters to use "headers add", but probably not remove. Or maybe
465just implement "allow" options for both of these features.
466
467. Have the return from pipe in a variable, so that (e.g. error_message_file)
468can make use of it.
469
470. Implement randomize for ldap/sql servers.
471
472. Add an option for ETRN that says "wait for the command to finish, and use its
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473stdout as the SMTP response." // A serialized ETRN now does the waiting, but
474there is as yet no way to use the status. //
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475
476. -odsomething for "ignore retry when doing immediate delivery".
477
478. Add an option to the smtp transport to make it treat 5xx on connection as if
479it were 4xx. Or possible add a sophisticated "after command X, treat xxx as
480yyy".
481
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482. Global option to enable initgroups() for exim uid. Default off.
483
484. When verifying a sender, should it be rewritten with any T rewrites, because
485it would be so rewritten if it actually was a recipient in a message?
486
487. Sean Witham wants a way of defining macros that are not privileged, and a
488sort of #ifdef structure that allows for different configurations in the same
489file.
490
491. Allow :fail: to specify that 551 be used instead of 550. Maybe allow a code
492at the start, optionally? What about :defer:?
493
494. SMTP timeout in middle of receiving message: log sender address if known, and
495possibly message_id if known.
496
497. Make -brw show rewrites for transports too.
498
499. Have the MTA log destinations that have timed-out on a ident request and
500no longer send rfc1413_queries to them. Add an option for how not to cache
501these entries.
502
503. Options and/or a utility to enable non-privileged users to view the queue
504(e.g. -bpp), manipulate their own messages, etc.
505
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506. A generalized "From" escaping scheme that also escapes >From so that the
507whole thing can be reversed.
508
509. There was a request for the \dns_again_means_nonexist\ option not to be
510instantaneous, but to operate only after the DNS has been giving "try again"
511for some time. Use the misc hints database.
512
513
514
515------------------------------------------------------------------------------
516------------------------------------------------------------------------------
517----- The Exim 4 Wish List ------
518------------------------------------------------------------------------------
519------------------------------------------------------------------------------
520
521(1) 01-Jan-02 U Use of dynamically loaded libraries.
522
523People want Exim to use dynamically loaded modules for a variety of reasons.
524When I started to create Exim, I never expected anything other than source
525distribution; the RPMs and inclusions in OS distributions caught me by
526surprise. I know very little about the mechanics of dynamic loading, but I'm
527aware that not all operating systems support it. I'm also aware that not all
528people support it!
529
530Furthermore, a way round this might be to supply more hooks along the lines of
531local_scan(). Then people can write their own dynamic loaders if they want.
532------------------------------------------------------------------------------
533
534(3) 01-Jan-02 U Test for over-quota at SMTP time
535
536This is a hard one, because the only way to test for over quota is to try to
537deliver a message, certainly if system quotas are being used. And also, the
538only available size at RCPT time is the SIZE option, though of course the test
539could be run at DATA time. I think maybe we leave this one to an external
540program, and require people to use ${run} to access the data. Let someone else
541figure out how to extract the current mailbox size!
542
543One suggestion is to implement
544
545 ${file_size:/path/to/file}
546 ${directory_size:/path/to/directory}
547
548so that explicit checks can be done. It may be necessary to have four
549operators, two being based on the block count, and two showing the "visible"
550size. Directory scanning is expensive; is there any scope for caching? It would
551seem not (you don't often get two addresses to the same user).
552------------------------------------------------------------------------------
553
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554(6) 01-Jan-02 S Option to disable the use of -t
555Dave C.
556
557Would require work so that Exim itself doesn't use -t.
558------------------------------------------------------------------------------
559
560(7) 01-Jan-02 M Avoid showing LDAP passwords in log lines for LDAP errors
561John W Baxter
562
563May be tricky, because at the higher levels, the format of the query is not
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564understood. // There is now a fudge that works in some cases. See ChangeLog
5654.51/PH/10. //
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566------------------------------------------------------------------------------
567
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568(9) 01-Jan-02 S Headers as well as body in file for autoreply
569Florian Laws
570------------------------------------------------------------------------------
571
572(10) 01-Jan-02 T Make "true" and "false" valid expansion conditions
573
574This might help with "and" and "or" when one of the sub-conditions is, for
575example, a lookup.
576------------------------------------------------------------------------------
577
578(11) 01-Jan-02 S Allow a filter to include another file.
579------------------------------------------------------------------------------
580
581(12) 01-Jan-02 M Support for different SQL servers per query
582
583In other words, the global mysql_servers etc. is too restrictive.
584------------------------------------------------------------------------------
585
586(14) 01-Jan-02 M? Support for Sendmail milters
587
588This could perhaps be done by extending the local_scan() idea and providing a
589"standard" module which interfaced to milter.
590------------------------------------------------------------------------------
591
592(15) 01-Jan-02 M More hooks like local_scan()
593
594One request has been for a similar hook at logging time. For other SMTP
0cf417c5 595interactions, maybe a hook into the ACL? See also 79 and 218 and 301.
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596------------------------------------------------------------------------------
597
598(17) 11-Jan-02 M The construction of config.h needs refactoring
599
600This has been hacked about substantially since the original implementation.
601Given that there is a program (buildconfig), the messing around with the
602environment could be abolished. Also, the distinction between "yes" and "no"
603isn't always properly made (tests for #ifdef don't care about the value).
604------------------------------------------------------------------------------
605
606(18) 24-Jan-02 S Make $value retain its value after a top-level expansion
607
608This was specifically for use in filter files. Currently it reverts to empty
609as a consequence of save/restore for every lookup. It might be confusing to
610do otherwise, however.
611------------------------------------------------------------------------------
612
613(19) 29-Jan-02 L Use of multiple DBM libraries
614
615The problem is how to handle conflicting function names. Much research is
616needed.
617------------------------------------------------------------------------------
618
619(20) 29-Jan-02 S Make system filter refreeze after manual thaw
620
621Currently, a "freeze" in a system filter doesn't freeze after a manual thaw.
622------------------------------------------------------------------------------
623
624(21) 12-Feb-02 S Expand return_size_limit
625Joachim Wieland
626
627Is this really worth it? A per-transport value is also suggested - that would
628mean remembering the value with each failed address and taking a minimum or
629a maximimum (which?).
630------------------------------------------------------------------------------
631
632(24) 21-Feb-02 ? A way of testing TLS using -bh
633------------------------------------------------------------------------------
634
635(27) 06-Mar-02 M Distinguishing between different temporary callout errors
636
637The request was to distinguish between a 4xx error and a failure to connect.
638Problem is: how to cope when there is more than one host? Maybe only if ALL
639fail to connect. An option like /callout_no_connect_ok.
640------------------------------------------------------------------------------
641
642(30) 12-Mar-02 S Add "recipients" precondition to routers.
643
644This would avoid having to use "condition". (See also requirement for $address
645mentioned above.) However, it would also require adding a caching feature, and
646probably $recipient_data (cf $domain_data).
647------------------------------------------------------------------------------
648
649(31) 21-Mar-02 S Variables that indicate 8-bit message and 8-bit host, and
650 a way of using them to suppress a transport filter
651
652A variable that is set if the message contains 8-bit characters, and another
653that is set during the smtp transport if the host supports 8-bit. Then we also
654need a condition that's expanded in the transport to control whether the filter
655is run or not (e.g. transport_filter_condition).
656------------------------------------------------------------------------------
657
658(32) 22-Mar-02 M More info about callout fails for header sender verify
659
660When there's a callout failure for an envelope address, the error message
661contains details (by default) of the callout commands. This doesn't happen
662for addresses in the header because there may be more than one of them, and
663deciding how to give that information is tricky. Can we do better?
664------------------------------------------------------------------------------
665
666(33) 25-Mar-02 S Option to assume nomatch in dnslist lookups that time out
667
668Currently this causes a DEFER.
669------------------------------------------------------------------------------
670
671(34) 26-Mar-02 S Access to DNS lookup functions via local_scan() API
672
673This would make local_scan() writers lives easier for DNS usage.
674------------------------------------------------------------------------------
675
676(36) 02-Apr-02 ? A way of throttling, but allowing, relaying that would
677 otherwise be denied
678
679This was suggested in connection with anonymizing messages. The "wait" command
680in ACLs goes some way towards this. Is it enough?
681------------------------------------------------------------------------------
682
683(41) 17-Apr-02 T Make config.samples available as a directory for ftp
684
685This is so that people can browse individual samples directly.
686------------------------------------------------------------------------------
687
688(42) 23-Apr-02 T An option not to flatten newlines in $message_body.
689
690Or maybe better to provide $message_body_nl so as to have both.
691------------------------------------------------------------------------------
692
693(43) 23-Apr-02 T An option to treat 4xx as 5xx from STARTTLS
694
695This would make Exim retry in clear unless the host is in hosts_require_tls.
696------------------------------------------------------------------------------
697
698(44) 24-Apr-02 ? Use errors_to for timeouts after redirect syntax errors
699
700A syntax error in redirection data (with skip_syntax_errors false) causes a
701defer. Eventually, the address may time out. This suggestion is that, when it
702does, the bounce is sent to errors_to rather than to the sender.
703------------------------------------------------------------------------------
704
705(45) 13-May-02 T smtp_etrn_serialize_id = ....
706
707The default behaviour would be equivalent to
708
709 smtp_etrn_serialize_id = $smtp_command_argument
710------------------------------------------------------------------------------
711
712(47) 16-May-02 S Access to all addresses in batched local delivery
713Miquel van Smoorenburg
714
715In a batched local delivery with more than one recipient, there's no way to
716access the list of recipients for doing custom things, such as stuffing them
717all into a header. (BSMTP is the only approach; not everybody can use it.)
718Suggested patch supplied.
719------------------------------------------------------------------------------
720
721(48) 21-May-02 M Support for ATRN (server and client)
722Brian Candler
723
724Server: If Exim had the ability to accept an ATRN command and then simply
725invoke an external program, passing the SMTP stream on stdin and stdout and
726the authenticated id as a parameter, that would do the job nicely.
727
728Client: We need a variant of 'exim -bs' which would connect to a specified
729host, send AUTH/ATRN, and then accept incoming messages as usual.
730------------------------------------------------------------------------------
731
fc9c2317 732(50) 22-May-02 S? Add comment (duplicate address) to Envelope-To:
e05f33e0 733
fc9c2317
PH
734This is just to minimize the confusion some people have. However, it is not
735trivially easy to decide which to label as duplicates because of complications
736with redirection. I'm not convinced it will actually reduce confusion.
e05f33e0
PH
737------------------------------------------------------------------------------
738
739(51) 07-Jun-02 S Option to use another address in callout MAIL FROM
740
741This would be an address to try if MAIL FROM:<> failed. Is this actually going
742to be helpful? See also 101.
743------------------------------------------------------------------------------
744
745(53) 11-Jun-02 S Make local_scan() dynamically loadable
746
747David Woodhouse sent a patch. There's a more sophisticated one from Marc
748Merlin. (See also Peter Benie's comments.) But should the base Exim have all
749this in it?
750------------------------------------------------------------------------------
751
752(54) 11-Jun-02 S Ignore -Ac if called as mailq
753
754I am not sure if this makes sense. This flag requests a listing of a different
755mail queue, but Exim doesn't work like that. Is is not better for people to be
756aware of this?
757------------------------------------------------------------------------------
758
759(55) 13-Jun-02 M Rewriting whole header lines
760Dave C.
761
762Current rewriting rules apply to individual addresses in header lines. This
763feature would use a regex to match whole lines and replace them. It could be
764useful for patching up syntactically invalid lines from crappy clients, before
765the syntax check kicks in. (It might also be useful for hiding local host names
4990831e 766in Received: headers.) See also 333.
e05f33e0
PH
767------------------------------------------------------------------------------
768
769(58) 26-Jun-02 ? Extend PAM support
770
771Apparently PAM can do challenge-response authentication. The Exim interface
772can't handle this. Investigate and think about how to do this.
773------------------------------------------------------------------------------
774
775(59) 26-Jun-02 M A "custom" authenticator
776
777... that is simply a front end to external code. For example, there may be
778an external API that hides the user password and does CRAM-MD5 when passed the
779details of the challenge and response.
780------------------------------------------------------------------------------
781
782(60) 27-Jun-02 S Make trusted_users a local part list
783
784So that it can use lsearch etc.
785------------------------------------------------------------------------------
786
787(62) 28-Jun-02 S Remove headers before DATA ACL
788Patrice Fournier
789
790"I'd like to be able to give Exim a list of headers that must be removed
791from the message at arrival, before data_acl processing (and before the
4990831e 792rcpt_acl warn headers are added to the message)." See also 333.
e05f33e0
PH
793------------------------------------------------------------------------------
794
795(63) 28-Jun-02 S Access to ACL-added headers in ACLs
796Patrice Fournier
797
798"I'd like also to be able to look at the already added headers by a
799rcpt_acl when still checking rcpt_acl (either later in the acl for the same
4990831e 800RCPT TO or for another RCPT TO)." See also 333.
e05f33e0
PH
801------------------------------------------------------------------------------
802
803(65) 28-Jun-02 M Expand fallback hosts
804
805See also 174 of the Exim 3 list.
806------------------------------------------------------------------------------
807
808(66) 01-Jul-02 M Use Berkeley DB 4 concurrent access features
809
810This might give better performance on very busy sites by reducing the
811contention for access to hints databases. Rob Butler points out that this could
812also be useful to allow updates of other DB files used by Exim to happen
813concurrently. Another thing to think about with BDB is the possible use of
814B-trees.
815------------------------------------------------------------------------------
816
817(68) 01-Jul-02 S Add sender host to delivery line
818
819"Would it be possible to have a "sending_host_on_delivery" option that
820logs the IP of the sending host in the => line?" Also requested was amount of
821data transmitted for a non-delivery attempt.
822------------------------------------------------------------------------------
823
824(69) 03-Jul-02 T Log selector to log whoson checs
825Matt Bernstein
826
827"I'd quite like a log_selector option which could spot you'd done a whoson
828lookup in your DATA ACL and maybe log it as W=user."
829------------------------------------------------------------------------------
830
831(70) 09-Jul-02 S A way of changing the RCPT address in an accept router
832
833So as to avoid duplication problems when sending multiple addresses in multiple
834copies to the same address.
835------------------------------------------------------------------------------
836
e05f33e0
PH
837(74) 22-Jul-02 M Extend -bV to do more semantic checking
838
839For example, diagnose "local_hosts" that should probably be "+local_hosts".
840------------------------------------------------------------------------------
841
842(75) 23-Jul-02 S Reference option on command line
843
844The idea here is that a spam scanner that re-injects a message can supply a
845reference on the command line that gets logged with R=.
846------------------------------------------------------------------------------
847
848(78) 30-Jul-02 S Expand queue_only (and/or queue_only_file)
849
850The requirement is to make it possible to queue messages if certain conditions
851are met (e.g. messages from certain local users). See also 93.
852
853This control can now be achieved in the ACL - is this still needed?
854------------------------------------------------------------------------------
855
856(79) 31-Jul-02 S Additional info for log lines
857
858An option to set an expanded string to be added to <= lines. And also for the
859other delivery lines? See also 15.
860------------------------------------------------------------------------------
861
862(84) 09-Aug-02 S Make interfaces available in a variable
863
864Something like $local_interfaces. Maybe limit the max length.
865------------------------------------------------------------------------------
866
867(85) 12-Aug-02 S/M Notice database connection failures
868
869The small version of this just removes a server from the list within a single
870Exim process when a connection to it fails. The bigger project would use the
871retry database - but that has implications for bottlenecking and may not be
872helpful. See also item 109. Another suggestion is to randomize the order in
873which database servers are tried (randomize_database_servers). And another is
874to measure response times and remember which server is fastest.
875------------------------------------------------------------------------------
876
877(87) 12-Aug-02 M Partial lookups for query-style lookups
878
879The suggestion is to allow the lookup to contain a keystring (same syntax as
880single-key lookups) which is then permuted and place in a suitable variable
881each time - $permuted_key or something.
882------------------------------------------------------------------------------
883
884(88) 20-Aug-02 S Allow special retrying for forced defer
885
886See also 146 in Exim 3 wish list above.
887------------------------------------------------------------------------------
888
889(89) 20-Aug-02 S Also allow retry rules on routers and transports
890------------------------------------------------------------------------------
891
892(90) 23-Aug-02 M Macros with arguments, a la C
893
894I don't like this, because of the cost of frequent interpretation.
895------------------------------------------------------------------------------
896
897(93) 27-Aug-02 S queue_only_condition
898Peter A. Savitch
899
900queue_only_condition global option, expanded string. This contain
901condition, which if evaluated to `no' or `false' or `0', behaves like
902queue_only (queue_only_load ?). Don't know what to do is the string
903expansion fails with DEFER (either force queueing or continue with
904immediate delivery). Another option can control Exim behaviour if the
905expansion fails. Don't know how the name for it ;-) See also 78.
906
907This control can now be achieved in the ACL - is the new feature now needed?
908------------------------------------------------------------------------------
909
910(95) 27-Aug-02 S Log all parents as a router option
911
912So that specific addresses can be logged like this. Should there be more log
913selector options per router? Per transport?
914------------------------------------------------------------------------------
915
916(99) 28-Aug-02 L Test pre-conditions in order given
917
918This would get round certain problems with require_files. However, it is
919totally incompatible, and therefore an "Exim 5" wish.
920------------------------------------------------------------------------------
921
922(101) 02-Oct-02 M Callout and <> rejections
923
924Some people don't want to fail the callout if the MAIL FROM:<> command is
925rejected. Think of a way of handling this tidily. See also 51.
926------------------------------------------------------------------------------
927
928(102) 03-Oct-02 M Log option to suppress message-id logging
929
930M because it would involve a change to eximstats.
931------------------------------------------------------------------------------
932
933(106) 09-Oct-02 S Appendfile to create directory not as user
934
935Arrange for the setup entry to appendfile to create the directory under some
936other uid (and with given owners/permissions?)
937------------------------------------------------------------------------------
938
939(109) 15-Oct-02 M Remember when LDAP (etc) servers are down
940
941The idea would be to use some kind of retry rule, just like for hosts.
942See also 85.
943------------------------------------------------------------------------------
944
945(110) 18-Oct-02 M errors_to for pipe command in filter
946
947To work in the same was as errors_to for deliver commands.
948------------------------------------------------------------------------------
949
950(113) 15-Nov-02 M support for XMLRPC
951
952Patch supplied for 4.10 by Joel Vandal.
953------------------------------------------------------------------------------
954
955(114) 04-Dec-02 M local_scan: return message on accept
956
957(This actually dates from earlier.) The problem with this is that the string
958currently passes into $local_scan_data. Thus, an incompatible change of some
959sort would be required. Possibly a global that local_scan can set?
960------------------------------------------------------------------------------
961
962(118) 10-Dec-02 S access to Perl from local_scan
963------------------------------------------------------------------------------
964
965(119) 12-Dec-02 M ability to specify additional headers in an autoreply
966
967This is so that vacation messages etc can have MIME headers that specify, for
968example, the character set.
969------------------------------------------------------------------------------
970
971(125) 02-Jan-03 M Per-host daemon logging
972
973"So what I would like is an option like debug_hosts, that allows to specify
974an hostlist, and if the current incoming/outgoing hosts matches, creates a
975logfile like $hostname_(in|out).log in my logdirectory."
976------------------------------------------------------------------------------
977
978(127) 06-Jan-03 M Different messages for different callout failures
979
980The real requirement here is to detect when a callout "MAIL FROM:<>" failed, so
981that a specific warning about that can be sent, different to the message when a
982callout "RCPT TO:" fails. I think this is in fact now mostly done.
983------------------------------------------------------------------------------
984
985(129) 09-Jan-03 M Keep track of DNSBL timeouts, and refrain from calling
986
987If so configured, keep track of DNSBL timeouts in a hints record, and don't
988retry that DNSBL for a while after (a sufficient number of) timeouts. It is
989effectively disabled for a while. Log enable/disable, of course. Another
990thought is an option not to apply +defer_unknown unless *all* DNSBL lookups in
991a list defer.
992------------------------------------------------------------------------------
993
994(130) 09-Jan-03 M A number of LDAP-related things
995Peter A. Savitch
996
997OpenLDAP 2.1 is going to be more popular (2.1.9 is available with many
998bug fixes). TLS-enabled LDAP is an interesting and usefull thing.
999I can try to implement some things and send the patches, like with
1000ldapi.
1001
1002How do You see:
1003
10041) The propagation of TLS options (key, certificate, CA certificate)
1005 to the OpenLDAP library.
1006
10072) (was dereferencing; done in 4.23).
1008------------------------------------------------------------------------------
1009
1010(131) 09-Jan-03 S Additional variables
1011Peter A. Savitch
1012
1013$root_uid Why?
1014
1015(Some that were previously here are done)
1016
1017$smtp_accept_count -- used for acl_smtp_connect
1018
1019$queue_runners -- children of the listening daemon could use this
1020 value for controlling the number of queue runners
1021
1022I don't like either of these because they cannot be real-time values. They
1023would be snapshots of the values at the time the process was forked from the
1024daemon, and I fear they would just be confusing. For processes that were not
1025forked from the daemon they couldn't be set at all.
1026------------------------------------------------------------------------------
1027
1028(131) 09-Jan-03 S Additional options
1029Peter A. Savitch
1030
1031exim_processes_max
1032exim_file_descriptors_max
1033queue_run_condition -- to deprecate queue_run_max, better system
1034 load control
1035
1036Given Exim's distributed nature, I'm not at all sure how the first two of these
1037can usefully be implemented.
1038------------------------------------------------------------------------------
1039
1040(132) 16-Jan-03 M Option for when a transport filter fails (crashes)
1041
1042Freezing is one obvious option. Currently, Exim just retries. Another user
1043wanted to retry without the filter, but that is much harder.
1044------------------------------------------------------------------------------
1045
1046(136) 24-Jan-03 M Make "personal" available as a condition for use in routers
1047------------------------------------------------------------------------------
1048
1049(138) 28-Jan-03 M A variable containing what was matched in a host list
1050
1051Or, presumably, other lists. This is so that ACL messages can say things like
1052"your host name matches xxxx". Note: not the same as $domain_data. Also, this
1053could be tricky with lookups and things that match in files.
1054------------------------------------------------------------------------------
1055
1056(143) 06-Mar-03 L Ability to have multiple authenticators of same type
1057
1058For example, to have two PLAIN authenticators; if the first fails, try the
1059second.
1060------------------------------------------------------------------------------
1061
1062(144) 07-Mar-03 T ACL control = local_scan_skip to skip the local scan
1063
1064A bigger project would be control = local_scan <xxx> where xxx could select
1065different local_scan functions (possibly by dynamic loading).
1066
1067This can now be simulated using the fact that ACL variables are preserved,
1068so it doesn't look as it once did.
1069------------------------------------------------------------------------------
1070
1071(145) 07-Mar-03 T Export string_cat() to local_scan()
1072------------------------------------------------------------------------------
1073
1074(147) 17-Mar-03 T Option to treat 5xx as 4xx if received on initial connection
1075
1076This issue is controversial. That may be a good reason for not changing
1077anything.
1078------------------------------------------------------------------------------
1079
1080(153) 25-Apr-03 S A way of making log_as_local apply to the smtp transport
1081
1082Either an option on the transport, or log_remote_as_local for the router.
1083Messy, either way. Maybe log_local_as_local and log_remote_as_local, and
1084deprecate log_as_local?
1085------------------------------------------------------------------------------
1086
1087(154) 01-May-03 M Teergrubing at the CR/LF level
1088
1089It is believed that the most effective way to teergrube is to insert a delay
1090between transmitting CR and LF in the SMTP response. Furthermore, this is also
1091the best place to test for bad synchronization (i.e. at the last possible
1092time).
1093------------------------------------------------------------------------------
1094
1095(155) 01-May-03 S "control=no_pipelining" for connect and EHLO ACLs
1096
1097Yet more flexibility! Maybe this should be a more general control for what is
1098sent in response to EHLO.
1099------------------------------------------------------------------------------
1100
1101(156) 06-May-02 M Finer-grained synchronisation checking
1102
1103On operating systems that can be asked whether any sent bytes have not yet been
1104ACK'd at the TCP/IP level, a finer-grained check for proper synchronisation can
1105be done. All bytes must have been ACK'd if the client has received the previous
1106response before sending the next command. See also 293.
1107------------------------------------------------------------------------------
1108
1109(157) 07-May-03 M Newline as a list item separator
1110
1111This will make life easier for lists obtained form databases where the
1112separator is naturally a newline.
1113------------------------------------------------------------------------------
1114
1115(158) 13-May-03 M Ability to add to OK message for SMTP commands
1116
1117For sending reasons for slow response, etc.
1118------------------------------------------------------------------------------
1119
1120(160) 19-May-03 M Remove headers using wild cards
4990831e
PH
1121
1122See also 333.
e05f33e0
PH
1123------------------------------------------------------------------------------
1124
1125(162) 28-May-03 M/L Use of real numbers in filters, expansions, and options
1126
1127The motivation for this is for handling spam scores that are real numbers. The
1128questions are (a) how widely should it spread and (b) whether floating point or
1129fixed point representations should be used. And what about the eval operator?
1130------------------------------------------------------------------------------
1131
1132(164) 02-Jun-03 S Set variables for interface and port in smtp transport
1133
1134These could be useful for varying HELO data etc. See also several other
1135items about interfaces above.
1136------------------------------------------------------------------------------
1137
1138(166) 18-Jun-03 S CN verification in client TLS code
1139
1140A tls_verify_cn option is suggested by Sven Geggus.
1141------------------------------------------------------------------------------
1142
1143(168) 19-Jun-03 S Ability to add a header recording envelope rewrites
1144
1145Current code adds a deleted header with only some information. Maybe what is
1146needed is a flag for a rewrite rule.
1147------------------------------------------------------------------------------
1148
1149(169) 19-Jun-03 M A way of detecting timeouts in callout returns
1150
1151------------------------------------------------------------------------------
1152
1153(170) 23-Jun-03 S Option to accept rather than defer after local scan timeout
1154
1155Suggested patch supplied.
1156------------------------------------------------------------------------------
1157
e05f33e0
PH
1158(172) 23-Jun-03 M Option to make SQL query to specific server
1159
1160------------------------------------------------------------------------------
1161
1162(175) 04-Jul-03 S show_all_ancestors_in_errmsg for the redirect router
1163
1164This is the opposite of hide_child_in_errmsg in effect.
1165------------------------------------------------------------------------------
1166
1167(180) 14-Jul-03 M Extend never_users to be more flexible
1168
1169e.g. never_users = ! mailnull : ! cyrus : !mailman : 0-100
1170------------------------------------------------------------------------------
1171
1172(183) 16-Jul-03 S freeze_tell_text to add custom text to the message
1173
1174------------------------------------------------------------------------------
1175
1176(185) 24-Jul-03 S An expansion operator that decodes RFC 2047 strings
1177
1178------------------------------------------------------------------------------
1179
1180(188) 13-Aug-03 T batch_max=0 to mean unlimited
1181
1182------------------------------------------------------------------------------
1183
1184(189) 22-Aug-03 S Allow filter "logwrite" to write to syslog
1185
1186I feel this is a dangerous facility, and also of very minority interest, at
1187least for user's filters. Allowing a system filter to write to mainlog or
1188syslog may be different. However, writing the main log would only be possible
1189if the filter runs as root or exim.
1190------------------------------------------------------------------------------
1191
1192(190) 22-Aug-03 S A way of testing "forced delivery" in filter and routers
1193------------------------------------------------------------------------------
1194
1195(191) 26-Aug-03 M Preserve $address_data for a verified recipient
1196
1197The idea is to preserve it in the recipients data structure so that local_scan
1198can have access to it. The value could also be used as the initial value of
1199$address_data while routing.
1200------------------------------------------------------------------------------
1201
1202(192) 05-Sep-03 M Better handling of TXT records for dnslists
1203
1204When multiple lists are accessible via a merged lookup, handling TXT records
1205is difficult. An option for doing the TXT lookup in a sub-list has been
1206suggested, with syntax such as
1207
1208 dnslists = list.example.org=127.0.0.2%dialups \
1209 ,127.0.0.3%relays \
1210 ,127.0.0.5%spews
1211------------------------------------------------------------------------------
1212
1213(194) 10-Sep-03 M $addresslist_data to be like $host_data/$domain_data
1214
1215------------------------------------------------------------------------------
1216
1217(195) 29-Sep-03 M A variable containing the error for verify = header_syntax
1218
1219Maybe there should always be a variable with the error message for all the
1220different kinds of verify failure.
1221------------------------------------------------------------------------------
1222
1223(196) 30-Sep-03 S A way of detecting whether it was HELO or EHLO in the ACL
1224
1225$received_protocol isn't reset until after the command is accepted (which
1226seems right), and $smtp_data shows only the arguments. Maybe $smtp_command?
1227------------------------------------------------------------------------------
1228
1229(197) 30-Sep-03 S MACROS_DROP_PRIVS and ALT_CONFIG_DROP_PRIVS
1230
1231Now that alternative configurations can be restricted to certain directories,
1232some more flexibility can be allowed. Not by default, though.
1233------------------------------------------------------------------------------
1234
1235(198) 01-Oct-03 M Accept mail after local_scan() crash instead of defer
1236
1237This may not be as easy to implement as it sounds; one is never sure of the
1238environment after a crash. Is is actually a good idea? The crashing local_scan
1239may have wrecked the memory in arbitrary ways; for example, screwing up the
1240recipients list...
1241------------------------------------------------------------------------------
1242
1243(199) 01-Oct-03 M ${pipe which will pipe the message to a script ...
1244
1245... and otherwise behave as ${run. Probably needs to have locking out features
1246so that it can be turned off for users .forwards if the sysadmin so desires.
1247------------------------------------------------------------------------------
1248
1249(200) 07-Oct-03 L Alternative ways of storing hints
1250
1251People want to store hints in databases. Some assert that SQL databases can
1252be made to perform satisfactorily. If a general interface could be worked on,
1253people could at least try different strategies. See also 66 above, which is
1254specifically concerned with Berkeley DB. Another possible option is a switch to
1255disable smtp-wait hints - to avoid contention problems.
1256------------------------------------------------------------------------------
1257
1258(201) 07-Oct-03 M A "soft bounce" feature
1259
1260This is an option that turns all hard bounces into soft bounces. The idea is
1261that it can be used as a safety-net while testing configurations. Instead of a
1262local bounce, the message stays on the queue; instead of 5xx SMTP responses,
12634xx ones are given.
1264
1265The ability to do the opposite - turn 4xx into 5xx under certain circumstances
1266might also be useful (e.g. after a certain time). This might best be done by
1267extending the retry logic to recognize 4xx as a special error. (This is now
1268done.)
1269------------------------------------------------------------------------------
1270
1271(202) 10-Oct-03 S -bvsomething to do a callout after the verify
fb636a0f
PH
1272
1273For example: -bvc and -bvsc. The problem now (Nov 04) is that there are quite a
1274few possible callout options that can be specified in an ACL, and they would
1275have to be replicated here.
e05f33e0
PH
1276------------------------------------------------------------------------------
1277
1278(203) 14-Oct-03 S verify=something to easily check for header presence
1279
1280This is purely cosmetic; "condition" can already be used.
1281------------------------------------------------------------------------------
1282
1283(204) 27-Oct-03 S an inverted queue_only_file
1284
1285That is, queue if a file does NOT exist.
1286------------------------------------------------------------------------------
1287
1288(205) 27-Oct-03 S expand smtp_accept_queue_per_connection
1289
1290------------------------------------------------------------------------------
1291
1292(206) 27-Oct-03 S appendfile: a variable containing the maildir base name
1293
1294------------------------------------------------------------------------------
1295
1296(207) 29-Oct-03 S ability to keep trusted users in a file - expand it.
1297------------------------------------------------------------------------------
1298
1299(208) 31-Oct-03 M cache temporary verification errors and fail after a time
1300
1301This request was for a way of turning temporary verification failures into
1302permanent ones after some fixed time.
1303------------------------------------------------------------------------------
1304
1305(209) 31-Oct-03 S a way of making crashes in pipe commands temporary errors
1306
1307------------------------------------------------------------------------------
1308
1309(210) 31-Oct-03 S runtime option to change the daemon name used for tcprwappers
1310
1311A patch for compile time was supplied, but this seems better as a runtime
1312option, for use with multiple Exim daemons.
1313------------------------------------------------------------------------------
1314
1315(211) 31-Oct-03 S ability to disable debugging output from -bh & -bhc
1316------------------------------------------------------------------------------
1317
1318(212) 31-Oct-03 M specify headers lines in HELO ACL to be added to all msgs
4990831e
PH
1319
1320See also 333.
e05f33e0
PH
1321------------------------------------------------------------------------------
1322
1323(214) 05-Nov-03 S Put the wild part of local part prefix/suffx in variables
1324
1325Unfortunately, this isn't quite as trivial as it seems.
1326------------------------------------------------------------------------------
1327
1328(215) 14-Nov-03 S A way of turning off message-submission fix-ups
1329
1330Globally, and perhaps also via an ACL control so that it can be done on a
fb636a0f
PH
1331per-message basis. Is this still needed? Since this item was added to this
1332list, default fixups for non-local messages have been removed, and control =
1333submission has been added.
e05f33e0
PH
1334------------------------------------------------------------------------------
1335
1336(215) 26-Nov-03 M/L Conversion of IDNA domain names for logging
1337
1338IDNA (RFCs 3490-3492) converts domains names containing non-ASCII characters
1339into ASCII strings of a special form. Exim will of course handle these.
1340However, it might be nice to convert them to a local code for logging. This
1341might be quite a big project: there's also output from -bp and eximon queue
1342display and no doubt other places as well. (Utilities that process the logs,
1343e.g. exigrep, eximstats, will be automatically handled if the logs are
1344changed.)
1345------------------------------------------------------------------------------
1346
1347(216) 27-Nov-03 S Option to bounce if required TLS doesn't happen
1348
1349This is for the smtp transport with hosts_require_tls set. Currently, it
1350defers. Possibly the best approach is to make the error one that can be seen by
1351the retry logic.
1352------------------------------------------------------------------------------
1353
1354(217) 27-Nov-03 M A function to pass back variables from Perl
1355
1356This is a function that can be called from Perl, to take a name and a value and
1357put that value into an Exim variable.
1358------------------------------------------------------------------------------
1359
1360(218) 01-Dec-03 M A local_scan-like hook at system filter time
1361
1362That is, make a C API available for custom filtering at this point.
1363------------------------------------------------------------------------------
1364
1365(221) 18-Dec-03 U Merge routers and ACLs - or at least make more similar
1366
1367"It will be very useful to be able to use most of the ACL conditions
1368(authenticated, hosts, senders, sender_domains, ... ) in routers and also the
1369possibility to have multiple conditions in routers. It will be great to also
1370be able to set variables in routers like in acl's." This is effectively a
1371radical suggestion for a complete re-design, and is therefore BIG.
1372------------------------------------------------------------------------------
1373
e05f33e0 1374(223) 22-Dec-03 S Support SOA lookup in dnsdb lookups
fb636a0f
PH
1375
1376This could be like zns, and climb up the tree till it hits a zone. Would the
1377name of the zone be required?
e05f33e0
PH
1378------------------------------------------------------------------------------
1379
1380(225) 22-Dec-03 M Add acl= to routers
1381
1382This would use an ACL to "control access" to a router, opening up a number
1383of interesting possibilities. Details of possible limitations need to be
1384investigated.
1385------------------------------------------------------------------------------
1386
1387(226) 23-Dec-03 S A way of treating DEFER as fail in dnsdb lookups
1388
1389(i.e. the dnsdb lookup failed, so accept the message)
1390------------------------------------------------------------------------------
1391
1392(227) 30-Jan-04 M A configuration .if facility
1393
1394"Second with the .ifdef and such, it would be nice to have a base .if,
1395so I could do something like
1396.if DEFINED_DATA == xyz
1397configuration here
1398.elseif DEFINED_DATA == abc
1399configuration here
1400.else
1401configuration here
1402.endif
1403also this would be nice at least in my case in the system filters, but
1404isn't required but you could pass the defined data to the system, in
1405variables."
1406------------------------------------------------------------------------------
1407
1408(229) 30-Jan-04 M New expansion mechanism: {list ...}
1409
1410"Proposed syntax: {list {separator}{item}{item}...}
1411This first expands the contents of {separator} and all of the {item}s,
1412then constructs a separator-delimited list. The twist is: if an {item}
1413generates the empty string, no separator will be generated for it.
1414The entire construct will fail is {separator} fails, or all {item}s
1415fail. If just some {item}s fail, they will be treated as if they
1416generated empty strings.
1417Examples:
1418 {list {,}{aaaaaa}{bbbbbb}{cccccc}} -> aaaaaa,bbbbbb,cccccc
1419 {list {,}{:fail:}{bbbbbb}{cccccc}} -> bbbbbb,cccccc
1420 {list {,}{aaaaaa}{:fail:}{cccccc}} -> aaaaaa,cccccc
1421 {list { }{aaaaaa}{bbbbbb}{}} -> aaaaaa bbbbbb
1422 {list { }{:fail:}{:fail:}{:fail:}} -> :fail:
1423 {list {:fail:}{aaaaa}{bbbb}{cccc}} -> :fail:
1424See particularly examples 2-4, which handle the case of a missing first
1425and last item with ease; doing this using {if ...} would be quite difficult!"
1426------------------------------------------------------------------------------
1427
1428(230) 30-Jan-04 M Find IP addresses of a domain's nameservers
1429
1430This needs some way of processing a list of things in a similar way, which
fc9c2317
PH
1431should perhaps be a more general facility. // This can now be done using the
1432list facilities of dnsdb; verbose, but it can be done. //
e05f33e0
PH
1433------------------------------------------------------------------------------
1434
1435(231) 30-Jan-04 ? -C has a number of problems when used for real
1436
1437-C was intended for testing; people are using it for "alternate"
1438configurations, and it doesn't work too well. Can a better way of doing this be
1439invented?
1440------------------------------------------------------------------------------
1441
1442(232) 02-Feb-04 ? Make parts of the code loadable
1443
1444The idea being that drivers, etc. could be compiled separately. There are, of
1445course, security issues. This is not something I want to go into at present.
1446------------------------------------------------------------------------------
1447
1448(235) 02-Feb-04 T Make smtp_accept_count available as a variable
1449
1450This is for use in ACLs. Of course, it is a snapshot of the count at the
fc9c2317
PH
1451start of the receiving process. As such, it could be confusing because if a
1452connection lasts a long time, the "true" value could be very different. For
1453this reason, I don't really like this idea.
e05f33e0
PH
1454------------------------------------------------------------------------------
1455
1456(236) 02-Feb-04 S String in local_scan that's added to the binary version string
1457------------------------------------------------------------------------------
1458
1459(237) 02-Feb-04 M Add_header in ACLs because "message" is overloaded
1460
4990831e
PH
1461This would be useful for verbs where "message" is an error message. See also
1462333.
e05f33e0
PH
1463------------------------------------------------------------------------------
1464
1465(238) 05-Feb-04 S ${address to handle multiple addresses
1466
1467At present, ${address expects to see just one address. An extension would let
1468it handle header lines with multiple addresses, just retaining the actual
1469addresses. Or perhaps a new operator is needed?
1470------------------------------------------------------------------------------
1471
1472(239) 23-Feb-04 ? Expansion items for encryption/decryption
1473
1474Perhaps for some kind of cookie handling? This would need an external crypto
1475library, because there's no crypto code in Exim itself.
1476------------------------------------------------------------------------------
1477
1478(240) 23-Feb-04 ? Some way to know if a ip is a mx for a given domain
1479
1480Some kind of iterative operation for dnsdb might be a general way of providing
fc9c2317
PH
1481this. // This can now be done using the list facilities of dnsdb; verbose, but
1482it can be done. //
e05f33e0
PH
1483------------------------------------------------------------------------------
1484
1485(242) 01-Mar-04 ? Run a filter from an expansion condition
1486
1487This would add a lot of power to ACLs, but its implementation might be tricky
1488because of the possibility of recursion.
1489------------------------------------------------------------------------------
1490
1491(243) 01-Mar-04 ? Run an ACL from an expansion condition
1492
1493The problem here is knowing what data is available at an arbitrary time.
1494------------------------------------------------------------------------------
1495
1496(244) 01-Mar-04 ? Add an on-success event to transports
1497
1498This could just be an expansion string, whose value is either ignored or
1499logged, but it could be used to run SQL updates or run programs etc.
1500However, what is "success" when a transport has multiple recipients?
1501------------------------------------------------------------------------------
1502
1503(245) 01-Mar-04 M Add all the string expansion conditions to filters
1504
1505Some thought would be needed on how to design the syntax for this.
1506------------------------------------------------------------------------------
1507
1508(247) 09-Mar-04 S IP addresses that are never looked up
1509
1510It would be nice if we could prevent this for certain IP addresses for
1511which we _know_ we'll never get a valid PTR record, like 2002::/16.
1512So a new option might reasonably default to:
1513
1514 hosts_never_lookup = <; 2002::/16
1515------------------------------------------------------------------------------
1516
1517(253) 05-Apr-04 M Use ESMTP and TLS for recipient callout verification
1518
1519The best way to do this would involve quite a bit of refactoring so as to
1520abstract some of the code from the smtp transport into subroutines that could
1521also be used from the callout code. The tls parameters should probably be
1522taken from the transport. That might also require some substantial code
1523refactoring. See also 294.
1524------------------------------------------------------------------------------
1525
1526(260) 30-Apr-04 S Respect +tls_cipher +tls_peerdn in rejectlog entries
1527
1528------------------------------------------------------------------------------
1529
1530(261) 05-May-04 S Add a "required_version" option
1531
1532So that configurations can insist on a specific Exim version.
1533------------------------------------------------------------------------------
1534
1535(262) 10-May-04 S Add "scratch" ACL variables
1536
1537The idea is for variables that are flushed at the start of each ACL. I'm not
1538really convinced that these are worth implementing.
1539------------------------------------------------------------------------------
1540
1541(263) 10-May-04 S Add variable $router_name $transport_name
1542
1543These could be used in debug_print settings, which are output during -bt, and
1544thus don't need the privilege to run with -d.
1545------------------------------------------------------------------------------
1546
1547(265) 25-May-04 M An init.d script for exim is needed
1548
1549The old sendmail script used to "just work" because it just did -bd -q 20m or
1550whatever. Newer versions start more than one sendmail daemon, so do not work.
1551------------------------------------------------------------------------------
1552
1553(267) 25-May-04 S tarpitting delay option
1554
1555A modifier that sets a delay between lines for multiline responses.
1556------------------------------------------------------------------------------
1557
1558(268) 25-May-04 S? Add a PID to every log line
1559
1560Given that pids are reused non-cyclically these days, is this actually useful?
1561------------------------------------------------------------------------------
1562
e05f33e0
PH
1563(270) 01-Jun-04 M Add headers at top and middle
1564
1565Various initiatives like SPF and DomainKeys require header lines to be added
1566above or in the middle of existing headers. Exim always adds at the bottom.
1567When these requirements are more standard and clearer, some way of controlling
1568where header lines are added will probably become necessary. Some new syntax
1569will be required.
1570
1571This can now be done fairly generally from local_scan(), and at the start and
4990831e 1572after the Received: block from an ACL. Is anything more needed? See also 333.
e05f33e0
PH
1573------------------------------------------------------------------------------
1574
1575(271) 02-Jun-04 L Callouts at routing time
1576
1577From a user's message:
1578
1579> I would like to be able to:
1580>[...]
1581> 2) Forcing callouts as address verification at router level
1582> [ check_callout just like check_local_user ]
1583>
1584> I would like to redirect messages in some domain to "domain with callout
1585> verification" and to "domain without callout verification"
1586>
1587> e.g.
1588> userA@domain.in -> userX@doamin.out-verify (use callout to verify)
1589> userB@domain.in -> userY@doamin.out-noverify (do not use callout verify)
1590>
1591> [both out-* domains delivered via "callout ready" transports]
1592
1593Other versions of the wish:
1594* limiting callouts in acls to specific transport
1595 verify = recipient/callout=5s,transport:intranet_smtp
1596* adding "select transport" to ACL conditions
1597 accept domains = +local_domains
1598 transport = cyrus_ltcp
1599 verify = recipient/callout=5s
1600------------------------------------------------------------------------------
1601
1602(272) 07-Jun-04 S Expand hosts_randomize
1603
1604It occurs in manualroute and in smtp.
1605------------------------------------------------------------------------------
1606
1607(278) 21-Jun-04 M quota_warn_message_file option
1608
1609Similar to the bounce and delivery warn message files.
1610------------------------------------------------------------------------------
1611
1612(280) 23-Jun-04 M A way of adding a header line after callout defer_ok
1613
1614This would record that, e.g., a sender domain verified, but the callout
fb636a0f
PH
1615could not be done. There are ways of fudging this, using ACL variables and
1616"warn" statements.
e05f33e0
PH
1617------------------------------------------------------------------------------
1618
1619(285) 16-Jul-04 M Separate and independent log_selector for rejectlog
1620
1621For example: mainlog_selector and rejectlog_selector, with log_selector setting
1622both of them.
1623------------------------------------------------------------------------------
1624
1625(286) 21-Jul-04 M Distinguishing a larger number of errors
1626
1627For instance, detecting "connection reset by peer" (ENETRESET or ECONNRESET)
1628might be useful.
1629------------------------------------------------------------------------------
1630
1631(288) 10-Aug-04 M Option for verify to require MX
1632
1633e.g. verify=sender/require_mx
1634I'm not too keen because this is rather special purpose, and of course could
1635only apply if the verification happened to hit a dnslookup router.
1636------------------------------------------------------------------------------
1637
1638(289) 10-Aug-04 L Option to treat defers in database lookups as "not found"
1639
1640This is so that alternatives can be coded for when databases are down. A
1641suggested patch has been sent, but it just catches all instances of "defer"
1642from a lookup in an expansion string. These can occur for a number of different
1643reasons, not just connection failures. I think that we need a specific
1644"connection failed" indicator. Also, what about lookups in lists?
1645------------------------------------------------------------------------------
1646
1647(291) 13-Aug-04 M An ACL or "local_scan()" to be run on size excession
1648
1649The idea is to give something a chance to look at the data so far received when
1650more than message_size_limit (or some other limit) has arrived. I am not sure
1651how useful this would actually be in practice.
1652------------------------------------------------------------------------------
1653
1654(292) 13-Aug-04 M Overall timeout for message reception
1655
1656A client could in priciple keep an SMTP connection open for a very long time by
1657trickling in data very slowly. Also, after message_size_limit is exceeded, Exim
1658continues to swallow the data (though it does not write it to disk) until the
1659end is reached. Again, the connection could be held open for a very long time.
1660Some kind of overall time limit for an SMTP connection, possibly reset at the
1661start of each message, might be helpful in these situations.
1662------------------------------------------------------------------------------
1663
1664(294) 23-Aug-04 L Callouts and AUTH and LMTP
1665
1666People want to do callouts using LMTP as well as SMTP, and that would also
1667include sockets as well as TCP/IP connections. Also, people want to make use of
1668AUTH during the callout checking, on all types of connection. I suppose that
1669means making TLS available as well. This probably means a rewrite of the code
1670that actually does the callout. Should we use the relevant transport in a new
fdfdba09 1671"callout" mode instead of keeping things separate? See also 253 and 323.
461f4862
PH
1672
1673And here's another submitted idea: "My actual suggestion is that if this model
1674is followed, the parent process doesn't have to stop the callout process if it
1675is taking too long to respond: it can return 450 to the incoming connection
1676within the 5 minute SMTP command timeout and leave the callout process to
1677continue, in the hope that it will eventually get a result and store it in the
1678callout cache in time for the sender's next attempt."
e05f33e0
PH
1679------------------------------------------------------------------------------
1680
1681(296) 09-Sep-04 S Make deliver_time work for == lines as well as =>
1682
1683What about ** lines?
1684------------------------------------------------------------------------------
35f53bf6 1685
35f53bf6
PH
1686(299) 25-Oct-04 S Options to make Sieve "keep" pass to next router
1687
1688Currently, "keep" saves in the mailbox. Probably need two options, for implicit
1689and explicit keep commands.
1690------------------------------------------------------------------------------
1691
0cf417c5
PH
1692(301) 27-Oct-04 M Use an "ACL" to filter logging
1693
1694This idea was for ACL syntax to be able to "accept" or "deny" individual log
1695lines. This would make it possible to have, for example, per-host logging for
1696certain things. See also 15 above.
1697------------------------------------------------------------------------------
32aaebb6
PH
1698
1699(302) 28-Oct-04 M Expand pass_router and redirect_router
1700
1701Doing this would mean postponing the validity checks till the router was
1702actually used instead of doing them at start up. It does not seem to be a
1703facility that will be widely used.
1704------------------------------------------------------------------------------
1705
1706(303) 28-Oct-04 M Support SQL relay
1707
1708This would make it easier for packagers to support "generic SQL" without having
1709to choose which one. It can be slotted in using a MySQL interface without
1710modifying Exim, but native support would be nice.
1711------------------------------------------------------------------------------
1712
1713(304) 02-Nov-04 M A way of seeing the whole message in Perl or ${run
1714
1715At present, the headers are available in $message_headers, but only part of
1716the body is visible. The only way to pass the whole body would be as a file
1717descriptor because it can be very large. See also (42).
1718------------------------------------------------------------------------------
1719
1720(305) 02-Nov-04 M A Perl transport
1721
1722The suggestion here is that an embedded Perl function takes responsibility for
1723doing the delivery. I am not at all keen on this. One way of doing it would be
1724to implement (244), which provides an "on success" string expansion. Then
1725anyone who wants this could run that on a transport that does nothing.
1726------------------------------------------------------------------------------
b5c45968
PH
1727
1728(306) 09-Nov-04 M Make the search type partial-lsearch*@ be useful
1729
1730At present, it treats the whole key as a domain for the partial search, then
1731does the *@ thing. A more sensible plan would be something like:
1732
1733 user@company.com
1734 *@company.com
1735 user@*.company.com
1736 *@*.company.com
1737 *
1738
1739That is, try the local part and * at each of the partial domain values.
1740------------------------------------------------------------------------------
5b1fde4d
PH
1741
1742(307) 24-Nov-04 S Check the syntax of Message-ID: header lines
1743
1744This could be added to "verify=header_syntax" or, if the incompatibility is
1745felt to be too great, an additional condition, or a sub-option, could be added.
1746------------------------------------------------------------------------------
908acc4e
PH
1747
1748(308) 24-Nov-04 S Add $body_longlinecount and $header_longlinecount
1749
1750These variables would hold the number of physical lines in the body and header
1751that were longer than 998 bytes. This would be fiddly to implement because of
1752the way Exim currently reads the input. It isn't just a trivial patch.
1753------------------------------------------------------------------------------
a78fb8ef
PH
1754
1755(309) 01-Dec-04 S/M Queue runners should get locks before forking
1756
1757If a queue-runner opened the -D file and took out the lock before forking, it
1758would waste fewer resources if the message was already being delivered. But how
1759often would this actually matter in practice?
1760------------------------------------------------------------------------------
fbbf1e99
PH
1761
1762(310) 06-Dec-04 S After "personal" save what matched
1763
1764The idea is to save the email address that actually was found in the message
1765in a variable so it can be used (e.g. as the From: address in an autoreply).
1766------------------------------------------------------------------------------
59e88703
PH
1767
1768(311) 07-Dec-04 ? More flexible SMTP response codes
1769
1770The requestor wanted to be able to specify, for example, 551 in an ACL deny
1771instead of 550, and also vary the defer code. The first digit, however, should
1772remain fixed. In addition to main codes, enhanced status codes (RFC 2034) were
1773requested. (As far as I can tell, they have never been highly popular.)
1774------------------------------------------------------------------------------
f7b63901
PH
1775
1776(312) 10-Dec-04 ? Shadow remote transports
1777
1778Unless a lot of work is done, this would be restricted to another remote
1779transport. A similar effect could therefore be achieved with "shadow_hosts"
1780which are like fallback_hosts but which operate on success.
1781------------------------------------------------------------------------------
23fd96b1
PH
1782
1783(313) 21-Jan-05 ? Multiple queues
1784
1785Exim runs poorly if its queue gets too big. Various ways round this are all
1786to some extent kludges. There has been a suggestion of using multiple
1787directories instead of just "input". (Originally it was for a whole set of
1788spool directories, but that introduces complications with the hint files.)
1789On message arrival, somehow a selection of "input" must be made. Then queue
1790runners must be startable for the different "queues". Don't forget that the
1791"msglog" directory is also involved. Perhaps add a new level of indirection:
1792/var/spool/exim/queue1/{input,msglog}, /var/spool/exim/queue2/....
1793------------------------------------------------------------------------------
7163d8cf
PH
1794
1795(314) 15-Feb-05 M Multiple headers_{add,remove} for routers
1796
1797If headers_{add,remove} could be specified multiple times, it would be easier
4990831e
PH
1798for those people that construct configs using .ifdef or .include, etc. See also
1799333.
7163d8cf 1800------------------------------------------------------------------------------
54a4fbd5
PH
1801
1802(315) 15-Feb-05 M String variables for use in filters.
1803
1804Currently, only numerical variables are supported.
1805------------------------------------------------------------------------------
46c23dba
PH
1806
1807(316) 21-Feb-05 M Put callout response into a variable
1808
1809When a callout fails, put the entire SMTP response into a variable. This is not
1810trivial because we probably should retain it in the cache as well.
1811------------------------------------------------------------------------------
a6c11ddf
PH
1812
1813(317) 25-Feb-05 S Delete the pid file when the daemon exits
1814
1815At least try to catch some of the exit routes from the daemon and either delete
1816or empty the pid file.
1817------------------------------------------------------------------------------
09a23feb 1818
6758c780 1819(318) 02-Mar-05 S Add current connection count to daemon's exiwhat output
09a23feb 1820------------------------------------------------------------------------------
6758c780
PH
1821
1822(319) 03-Mar-05 ? Allow file rather than directory for scanning call
1823
1824"I can call arbitrary scanning software by specifying the full path. I can pass
1825a directory to be scanned in the arguments. I'd like to be able to pass a
1826specific file name instead of a directory. I think this would allow me to call
1827Bogofilter at smtp time. Bogofilter requires a filename, not a directory. The
1828file would contain the complete email. I suppose there may be other scanning
1829solutions with a similar requirement."
1830------------------------------------------------------------------------------
1831
45b1794b
PH
1832(321) 07-Mar-05 S Run an ACL on a sync error
1833
1834... and possibly "accept" or "deny" it.
1835------------------------------------------------------------------------------
596875b3
PH
1836
1837(322) 15-Mar-05 M Add a /defer_ok option to verify=reverse_host_lookup
1838------------------------------------------------------------------------------
fdfdba09
PH
1839
1840(323) 15-Mar-05 M Make callouts use smtp_data from the smtp transport
1841
1842This is yet another problem caused by duplicating the SMTP code between the
1843transport and the callout verification. See item 294 above. Merging the
1844transport and the callout code could prevent this kind of thing from happening.
1845------------------------------------------------------------------------------
fb6f3d5c
PH
1846
1847(324) 04-Apr-05 ? Make -bP show ACLs
1848
1849This is in the Bugzilla as #10.
1850------------------------------------------------------------------------------
4e714aed 1851
f331f3b6
PH
1852(326) 03-May-05 ? Queue-only on memory shortage
1853
1854This is bugzilla #17. The idea is to have something like queue_only_load that
1855triggers on a shortage of main memory.
1856------------------------------------------------------------------------------
f0884f39
PH
1857
1858(327) 06-May-05 ? Break delay if connection drops
1859
1860Currently, "delay=5m" (e.g.) waits for 5 minutes. If we can detect that the
1861connection has died in the meantime, it would make sense to break the delay.
ec798043
PH
1862However, it doesn't seem possible to detect a dropped connection without trying
1863to read from it.
f0884f39 1864------------------------------------------------------------------------------
22907b39 1865
c9f149f5 1866(328) 10-May-05 S After "unseen" routing, pass on header additions/deletions
22907b39
PH
1867
1868Currently, when an "unseen" router accepts an address, header additions and
1869deletions stick with that address, and the "clone" address that continues to be
1870routed starts off without any additions or removals. This request is for an
1871option to select other actions: retain header actions with the clone only, or
4990831e 1872pass them on to both addresses. See also 333.
22907b39 1873------------------------------------------------------------------------------
c9f149f5
PH
1874
1875(329) 12-May-05 S Create message ID at MAIL FROM time
1876
1877Currently, the ID is created only when Exim is about to create the data (-D)
1878file for an incoming message. In other words, after it knows it really is going
1879to accept the message. Creating the ID earlier would mean that rejection
1880messages in the log would be tagged with an ID, and this is seen as desirable
1881by some people.
1882------------------------------------------------------------------------------
ec798043
PH
1883
1884(330) 31-May-05 ? Default interface for -bh and default port for -oMi
1885
1886I do not think it worth putting effort in here for these reasons: If a host has
1887multiple interfaces, there's no easy way to choose one to be the default for
1888$interface_address when -bh is used. If the host does not have multiple
1889interfaces, chances are the configuration won't be looking at
1890$interface_address anyway. If you are setting -oMi, and care about the port, it
1891isn't much effort to tack on a port number, though in this case, I suppose a
1892default of 25 is "obvious".
1893------------------------------------------------------------------------------
1894
1895(331) 31-May-05 M More than one retry time per host
1896
1897Consider this example: an attempt to start a TLS connection to a host gets a
1898temporary error. This stops *all* connections, both for TLS and otherwise.
1899Different retry times for different circumstances are needed to get round this.
1900What are the circumstances? TLS/not-TLS is clearly one, but sometimes you don't
1901know if you are going to try TLS until you have connected. So this makes sense
1902only if require_tls is used. Perhaps the multiple retry times should just be
1903per-transport, to avoid these difficulties. If we made all retry keys depend on
1904the transport, this would happen automatically.
1905------------------------------------------------------------------------------
857c3b3f
PH
1906
1907(332) 03-Jun-05 S A "receive time taken" log selector
1908
1909This suggestion is to at an RT= item to the <= line, giving the time it
1910actually took to receive the message.
1911------------------------------------------------------------------------------
4990831e
PH
1912
1913(333) 06-Jun-05 L Re-think and re-implement header handling
1914
1915There are a number of items related to headers above. Better facilities for
1916handling headers at ACL time are needed. The whole way in which Exim handles
1917headers should be re-planned and re-implemented in a more consistent manner.
1918
1919These are the main previous items:
1920
1921Exim 3 Wish List: 41, 85, 149, 187.
1922Exim 4 Wish List: 55, 62, 63, 160, 212, 237, 270, 314, 328.
1923------------------------------------------------------------------------------
2db98699
PH
1924
1925(334) 07-Jun-05 M Support for messages larger than 2G
1926
1927This is probably a longish-term thing at the moment. Quotas over 2G are now
1928supported, but not individual messages; no doubt one day this will be wanted.
1929------------------------------------------------------------------------------
8783ca69 1930
4aac9b49
PH
1931(336) 16-Jun-05 M Show recipient(s) after header check failure
1932
1933The mainlog line for "There is no valid sender in any header line" shows the
1934sending host and the envelope sender, but does not show any recipients. There
1935has been a request to show recipients. Presumably this should be on some new
1936log selector, and it must have a cutoff maximum number of recipients. NOTE: the
1937data in the reject log does show the envelope recipients as part of its
1938additional data.
1939------------------------------------------------------------------------------
14c6eb72 1940
128376c1 1941(337) 29-Jun-05 S Add "defer" to $recipient_verify_failure
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1942
1943This is for when defer_ok was set when verifying recipients. Since this isn't
1944for a failure, we probably also need "ok" for the non-fail case.
1945------------------------------------------------------------------------------
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1946
1947(338) 14-Jul-05 M Change to Bind 9 API
1948
1949Exim uses the original API for calling the DNS resolver. There is a newer API
1950available, and noises are being made in some OS that compatibility with the old
1951API is going to be dropped. Nevertheless, there are sure to be systems about
1952for ages that require the use of the old API. Therefore, we will have to
1953implement not only an interface to the new API, but a backwards compatibility
1954feature. It would be nice if this was automatic.
1955------------------------------------------------------------------------------
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1956
1957(339) 28-Jul-05 S Log name of maildir file
1958
1959This wish is for an option to log the name of the file that is written in
1960maildir format (e.g. time.pid.host).
1961------------------------------------------------------------------------------
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1962
1963(340) 30-Aug-05 M Match more than one item
1964
1965match_address, for instance, matches one address to a list. The wish is to be
1966able to supply two lists; for each address in the first list, search the
1967second. Maybe something like ${match_any{...}{...}} is needed.
1968------------------------------------------------------------------------------
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1969
1970(341) 15-Sep-05 S Add /return_path_retain to submission mode
1971
1972This would re-instate the behaviour prior to change 4.52/TF/02.
1973------------------------------------------------------------------------------
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1974
1975(342) 26-Sep-05 T Log and maybe defer odd values for condition pre-condition
1976
1977Odd values for "condition" in an ACL cause it to defer. In a router, they are
1978treated as "true". At least they should be logged in a router, and perhaps they
1979should also defer, for compatibility with ACLs.
1980------------------------------------------------------------------------------
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1981
1982(343) 03-Oct-05 M A query-style lookup for scanning flat files
1983
1984The natural syntax for this would be to use a regex, like this:
1985${lookup regex{/some/file regex}{found-string}{not-found-string}}
1986------------------------------------------------------------------------------
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1987
1988(344) 10-Oct-05 M Make debug_print work in authenticators
1989------------------------------------------------------------------------------
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1990
1991(345) 14-Oct-05 M Standardize rejection messages
1992
1993"The parsing for rejection lines is a bit of a mess, and fairly
1994unmaintainable. Do you think it would be possible to standardise
1995rejection/refusal log messages? How about something like:
1996
1997(<ID>|16 Spaces) *< (Connection|MAIL|RCPT|HELO|EHLO|DATA) rejected (from
1998<Address>)?: <Reason> (\(<Detail>\))?"
1999------------------------------------------------------------------------------
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2000
2001(346) 20-Oct-05 S Set $domain and $local_part in retry matching
2002
2003Currently, these variables are unset. Make it like rewrite matching.
2004------------------------------------------------------------------------------
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2005
2006(347) 15-Nov-05 M Arrange to expand data from wildlsearch
2007
2008This would allow keys that are regular expressions to set up numerical
2009variables that are included in the data. This has to be done inside the lookup
2010code, because of caching. Probably means we have to invent ewildlsearch and
2011enwildlsearch.
2012------------------------------------------------------------------------------
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2013
2014(348) 17-Nov-05 S Option to allow AUTH when not advertised.
2015
2016It seems that there are clients that send AUTH when it hasn't been advertised,
2017some even after HELO, not even EHLO. Sigh. Possibly this should be an ACL
2018control, to enable it to be restricted to certain hosts.
2019------------------------------------------------------------------------------
5ef84b08 2020--- HWM 349 ------------------------------------------------------------------
e05f33e0 2021---------------------------- End of WishList ---------------------------------