(1) New Wish. (2) Typo and tabs in FAQ source.
[exim.git] / doc / doc-misc / WishList
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f0884f39 1$Cambridge: exim/doc/doc-misc/WishList,v 1.31 2005/05/06 08:28:16 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
75solved with a replace_header option.
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
127Such as "return-receipt-to". See also 41.
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
324any change be made?
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
369(172) 11-Sep-2000 S Allow file/directory in appendfile to override
370"Michael J. Tubby"
371
372When appendfile is called from forward or filter files, it ignores file or
373directory settings. Maybe they should override. The path set by the forward or
374filter is available in $address_file these days, so it could be used to create
375a longer path.
376------------------------------------------------------------------------------
377
378(173) 18-Sep-2000 S A way of doing lsearches with EOL terminated keys
379Jason Robertson
380
381This is for looking up things like subject contents. Probably need an option to
382exim_dbmbuild to make them into DBM files.
383------------------------------------------------------------------------------
384
385(174) 19-Sep-2000 S A way of using a different port for fallback hosts.
386Dean Brooks
387------------------------------------------------------------------------------
388
389(181) 10-Nov-2000 S Compile-time options for ignoring Sendmail options
390
391So that new ones could be accommodated easily.
392------------------------------------------------------------------------------
393
394(183) 04-Dec-2000 L dns_means_nonexist_after
395Dave C.
396
397In other words, wait a bit before giving up. This needs a mechanism for
398remembering, which is not currently available. To be borne in mind for the
399future.
400------------------------------------------------------------------------------
401
402(184) 04-Dec-2000 M Log more details of local caller
403J. Nick Koston
404
405"I was wondering if it was possible for exim to log the parent pid's cwd and
406exe when it is called from a script/invoked by actually running /usr/sbin/exim
407or /usr/sbin/sendmail." Question: is this information actually/easily
408available to Exim? Needs investigation.
409------------------------------------------------------------------------------
410
411(186) 19-Dec-2000 S A simple utility to reset a retry time
412Marc Haber
413
414Basically, to do what exim_fixdb "delete" can do, but straightforwardly. There
415could be an interface from eximon.
416------------------------------------------------------------------------------
417
418(187) 02-Jan-2001 M Wildcarding in headers_remove
419Tamas TEVESZ
420
421What I'd like to see is it to handle globs (or regexps, but i'm not sure this
422latter would worth the hassle), in a way like:
423
424 headers_remove = "X-*:Additional-header"
425------------------------------------------------------------------------------
426
427(188) 02-Jan-2001 S Make pipe timeout a temporary error
428Georg v.Zezschwitz
429
430A way to make a timeout into a temporary error.
431------------------------------------------------------------------------------
432
433(190) 03-Jan-2001 M Multiple message operations in eximon
434------------------------------------------------------------------------------
435
436(195) 19-Mar-2001 T TCP window size
437
438TCP window size for receiving/sending, SMTP client/server.
439------------------------------------------------------------------------------
440------------------------------------------------------------------------------
441
442
443
444------------------------------------------------------------------------------
445------------------------------------------------------------------------------
446----- Things that didn't make it into Exim 4 ------
447------------------------------------------------------------------------------
448------------------------------------------------------------------------------
449
450. An option to send messages to postmaster when ignore_errmsg_errors_after
451times out.
452
453. When an address is being routed, its constituents are in $local_part and
454$domain, but there is currently no variable that contains the whole thing. It
455could be put into $recipient, but that risks confusion with $recipients
456(which is available in system filters). Maybe $address could be used?
457
458. The ability to relay to host X without knowing all the domains that host X
459might have. At ACL time, one would need to verify the recipient, and determine
460that it routed to host X.
461
462. A new lookup library that operates on a specially prepared file of IP
463addresses and masks so that a single "lookup" yields a yes/no answer. This
464should be a freestanding thing - needs a utility to build the file from a list.
465
466. People want to change the wording of messages; can we find an efficient way
467of allowing this? (Maybe put all messages into a separate module?) The problem
468is not in the messages themselves, but in the values that get inserted into
469messages. Would have to invent a new kind of function that used identified
470values rather than positional ones. Use GNU gettext?
471
472. Invent lf_hosts for those that may use LF without CR. Any other RFC
473things we need to worry about?
474
475. A user would really like to see something similar, perhaps with
476"ID=$authenticated_id", similar to "helo=" and "ident=" in the default received
477header. BUT there are security issues. Maybe give it as a commented out option
478in the default configuration?
479
480. Consider expanding further options that take integer values. What about
481smtp_xxx options for different limits at different times of day (for example)?
482What about tls_advertise_hosts (so can look at incoming IP/port)?
483
484. How about a "hold hosts" option (cf hold_domains) to hold delivery to certain
485hosts?
486
487. Allow user filters to use "headers add", but probably not remove. Or maybe
488just implement "allow" options for both of these features.
489
490. Have the return from pipe in a variable, so that (e.g. error_message_file)
491can make use of it.
492
493. Implement randomize for ldap/sql servers.
494
495. Add an option for ETRN that says "wait for the command to finish, and use its
496stdout as the SMTP response."
497
498. -odsomething for "ignore retry when doing immediate delivery".
499
500. Add an option to the smtp transport to make it treat 5xx on connection as if
501it were 4xx. Or possible add a sophisticated "after command X, treat xxx as
502yyy".
503
504. A way of rewriting addresses in non-standard header lines such as
505Mail-Followup-To.
506
507. Global option to enable initgroups() for exim uid. Default off.
508
509. When verifying a sender, should it be rewritten with any T rewrites, because
510it would be so rewritten if it actually was a recipient in a message?
511
512. Sean Witham wants a way of defining macros that are not privileged, and a
513sort of #ifdef structure that allows for different configurations in the same
514file.
515
516. Allow :fail: to specify that 551 be used instead of 550. Maybe allow a code
517at the start, optionally? What about :defer:?
518
519. SMTP timeout in middle of receiving message: log sender address if known, and
520possibly message_id if known.
521
522. Make -brw show rewrites for transports too.
523
524. Have the MTA log destinations that have timed-out on a ident request and
525no longer send rfc1413_queries to them. Add an option for how not to cache
526these entries.
527
528. Options and/or a utility to enable non-privileged users to view the queue
529(e.g. -bpp), manipulate their own messages, etc.
530
531. Specify a port along with a host in a route_list.
532
533. A generalized "From" escaping scheme that also escapes >From so that the
534whole thing can be reversed.
535
536. There was a request for the \dns_again_means_nonexist\ option not to be
537instantaneous, but to operate only after the DNS has been giving "try again"
538for some time. Use the misc hints database.
539
540
541
542------------------------------------------------------------------------------
543------------------------------------------------------------------------------
544----- The Exim 4 Wish List ------
545------------------------------------------------------------------------------
546------------------------------------------------------------------------------
547
548(1) 01-Jan-02 U Use of dynamically loaded libraries.
549
550People want Exim to use dynamically loaded modules for a variety of reasons.
551When I started to create Exim, I never expected anything other than source
552distribution; the RPMs and inclusions in OS distributions caught me by
553surprise. I know very little about the mechanics of dynamic loading, but I'm
554aware that not all operating systems support it. I'm also aware that not all
555people support it!
556
557Furthermore, a way round this might be to supply more hooks along the lines of
558local_scan(). Then people can write their own dynamic loaders if they want.
559------------------------------------------------------------------------------
560
561(3) 01-Jan-02 U Test for over-quota at SMTP time
562
563This is a hard one, because the only way to test for over quota is to try to
564deliver a message, certainly if system quotas are being used. And also, the
565only available size at RCPT time is the SIZE option, though of course the test
566could be run at DATA time. I think maybe we leave this one to an external
567program, and require people to use ${run} to access the data. Let someone else
568figure out how to extract the current mailbox size!
569
570One suggestion is to implement
571
572 ${file_size:/path/to/file}
573 ${directory_size:/path/to/directory}
574
575so that explicit checks can be done. It may be necessary to have four
576operators, two being based on the block count, and two showing the "visible"
577size. Directory scanning is expensive; is there any scope for caching? It would
578seem not (you don't often get two addresses to the same user).
579------------------------------------------------------------------------------
580
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581(6) 01-Jan-02 S Option to disable the use of -t
582Dave C.
583
584Would require work so that Exim itself doesn't use -t.
585------------------------------------------------------------------------------
586
587(7) 01-Jan-02 M Avoid showing LDAP passwords in log lines for LDAP errors
588John W Baxter
589
590May be tricky, because at the higher levels, the format of the query is not
591understood.
592------------------------------------------------------------------------------
593
594(8) 01-Jan-02 S Expand once_repeat in autoreply
595John Jetmore
596------------------------------------------------------------------------------
597
598(9) 01-Jan-02 S Headers as well as body in file for autoreply
599Florian Laws
600------------------------------------------------------------------------------
601
602(10) 01-Jan-02 T Make "true" and "false" valid expansion conditions
603
604This might help with "and" and "or" when one of the sub-conditions is, for
605example, a lookup.
606------------------------------------------------------------------------------
607
608(11) 01-Jan-02 S Allow a filter to include another file.
609------------------------------------------------------------------------------
610
611(12) 01-Jan-02 M Support for different SQL servers per query
612
613In other words, the global mysql_servers etc. is too restrictive.
614------------------------------------------------------------------------------
615
616(14) 01-Jan-02 M? Support for Sendmail milters
617
618This could perhaps be done by extending the local_scan() idea and providing a
619"standard" module which interfaced to milter.
620------------------------------------------------------------------------------
621
622(15) 01-Jan-02 M More hooks like local_scan()
623
624One request has been for a similar hook at logging time. For other SMTP
0cf417c5 625interactions, maybe a hook into the ACL? See also 79 and 218 and 301.
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626------------------------------------------------------------------------------
627
628(17) 11-Jan-02 M The construction of config.h needs refactoring
629
630This has been hacked about substantially since the original implementation.
631Given that there is a program (buildconfig), the messing around with the
632environment could be abolished. Also, the distinction between "yes" and "no"
633isn't always properly made (tests for #ifdef don't care about the value).
634------------------------------------------------------------------------------
635
636(18) 24-Jan-02 S Make $value retain its value after a top-level expansion
637
638This was specifically for use in filter files. Currently it reverts to empty
639as a consequence of save/restore for every lookup. It might be confusing to
640do otherwise, however.
641------------------------------------------------------------------------------
642
643(19) 29-Jan-02 L Use of multiple DBM libraries
644
645The problem is how to handle conflicting function names. Much research is
646needed.
647------------------------------------------------------------------------------
648
649(20) 29-Jan-02 S Make system filter refreeze after manual thaw
650
651Currently, a "freeze" in a system filter doesn't freeze after a manual thaw.
652------------------------------------------------------------------------------
653
654(21) 12-Feb-02 S Expand return_size_limit
655Joachim Wieland
656
657Is this really worth it? A per-transport value is also suggested - that would
658mean remembering the value with each failed address and taking a minimum or
659a maximimum (which?).
660------------------------------------------------------------------------------
661
662(24) 21-Feb-02 ? A way of testing TLS using -bh
663------------------------------------------------------------------------------
664
665(27) 06-Mar-02 M Distinguishing between different temporary callout errors
666
667The request was to distinguish between a 4xx error and a failure to connect.
668Problem is: how to cope when there is more than one host? Maybe only if ALL
669fail to connect. An option like /callout_no_connect_ok.
670------------------------------------------------------------------------------
671
672(30) 12-Mar-02 S Add "recipients" precondition to routers.
673
674This would avoid having to use "condition". (See also requirement for $address
675mentioned above.) However, it would also require adding a caching feature, and
676probably $recipient_data (cf $domain_data).
677------------------------------------------------------------------------------
678
679(31) 21-Mar-02 S Variables that indicate 8-bit message and 8-bit host, and
680 a way of using them to suppress a transport filter
681
682A variable that is set if the message contains 8-bit characters, and another
683that is set during the smtp transport if the host supports 8-bit. Then we also
684need a condition that's expanded in the transport to control whether the filter
685is run or not (e.g. transport_filter_condition).
686------------------------------------------------------------------------------
687
688(32) 22-Mar-02 M More info about callout fails for header sender verify
689
690When there's a callout failure for an envelope address, the error message
691contains details (by default) of the callout commands. This doesn't happen
692for addresses in the header because there may be more than one of them, and
693deciding how to give that information is tricky. Can we do better?
694------------------------------------------------------------------------------
695
696(33) 25-Mar-02 S Option to assume nomatch in dnslist lookups that time out
697
698Currently this causes a DEFER.
699------------------------------------------------------------------------------
700
701(34) 26-Mar-02 S Access to DNS lookup functions via local_scan() API
702
703This would make local_scan() writers lives easier for DNS usage.
704------------------------------------------------------------------------------
705
706(36) 02-Apr-02 ? A way of throttling, but allowing, relaying that would
707 otherwise be denied
708
709This was suggested in connection with anonymizing messages. The "wait" command
710in ACLs goes some way towards this. Is it enough?
711------------------------------------------------------------------------------
712
713(41) 17-Apr-02 T Make config.samples available as a directory for ftp
714
715This is so that people can browse individual samples directly.
716------------------------------------------------------------------------------
717
718(42) 23-Apr-02 T An option not to flatten newlines in $message_body.
719
720Or maybe better to provide $message_body_nl so as to have both.
721------------------------------------------------------------------------------
722
723(43) 23-Apr-02 T An option to treat 4xx as 5xx from STARTTLS
724
725This would make Exim retry in clear unless the host is in hosts_require_tls.
726------------------------------------------------------------------------------
727
728(44) 24-Apr-02 ? Use errors_to for timeouts after redirect syntax errors
729
730A syntax error in redirection data (with skip_syntax_errors false) causes a
731defer. Eventually, the address may time out. This suggestion is that, when it
732does, the bounce is sent to errors_to rather than to the sender.
733------------------------------------------------------------------------------
734
735(45) 13-May-02 T smtp_etrn_serialize_id = ....
736
737The default behaviour would be equivalent to
738
739 smtp_etrn_serialize_id = $smtp_command_argument
740------------------------------------------------------------------------------
741
742(47) 16-May-02 S Access to all addresses in batched local delivery
743Miquel van Smoorenburg
744
745In a batched local delivery with more than one recipient, there's no way to
746access the list of recipients for doing custom things, such as stuffing them
747all into a header. (BSMTP is the only approach; not everybody can use it.)
748Suggested patch supplied.
749------------------------------------------------------------------------------
750
751(48) 21-May-02 M Support for ATRN (server and client)
752Brian Candler
753
754Server: If Exim had the ability to accept an ATRN command and then simply
755invoke an external program, passing the SMTP stream on stdin and stdout and
756the authenticated id as a parameter, that would do the job nicely.
757
758Client: We need a variant of 'exim -bs' which would connect to a specified
759host, send AUTH/ATRN, and then accept incoming messages as usual.
760------------------------------------------------------------------------------
761
fc9c2317 762(50) 22-May-02 S? Add comment (duplicate address) to Envelope-To:
e05f33e0 763
fc9c2317
PH
764This is just to minimize the confusion some people have. However, it is not
765trivially easy to decide which to label as duplicates because of complications
766with redirection. I'm not convinced it will actually reduce confusion.
e05f33e0
PH
767------------------------------------------------------------------------------
768
769(51) 07-Jun-02 S Option to use another address in callout MAIL FROM
770
771This would be an address to try if MAIL FROM:<> failed. Is this actually going
772to be helpful? See also 101.
773------------------------------------------------------------------------------
774
775(53) 11-Jun-02 S Make local_scan() dynamically loadable
776
777David Woodhouse sent a patch. There's a more sophisticated one from Marc
778Merlin. (See also Peter Benie's comments.) But should the base Exim have all
779this in it?
780------------------------------------------------------------------------------
781
782(54) 11-Jun-02 S Ignore -Ac if called as mailq
783
784I am not sure if this makes sense. This flag requests a listing of a different
785mail queue, but Exim doesn't work like that. Is is not better for people to be
786aware of this?
787------------------------------------------------------------------------------
788
789(55) 13-Jun-02 M Rewriting whole header lines
790Dave C.
791
792Current rewriting rules apply to individual addresses in header lines. This
793feature would use a regex to match whole lines and replace them. It could be
794useful for patching up syntactically invalid lines from crappy clients, before
795the syntax check kicks in. (It might also be useful for hiding local host names
796in Received: headers.)
797------------------------------------------------------------------------------
798
799(58) 26-Jun-02 ? Extend PAM support
800
801Apparently PAM can do challenge-response authentication. The Exim interface
802can't handle this. Investigate and think about how to do this.
803------------------------------------------------------------------------------
804
805(59) 26-Jun-02 M A "custom" authenticator
806
807... that is simply a front end to external code. For example, there may be
808an external API that hides the user password and does CRAM-MD5 when passed the
809details of the challenge and response.
810------------------------------------------------------------------------------
811
812(60) 27-Jun-02 S Make trusted_users a local part list
813
814So that it can use lsearch etc.
815------------------------------------------------------------------------------
816
817(62) 28-Jun-02 S Remove headers before DATA ACL
818Patrice Fournier
819
820"I'd like to be able to give Exim a list of headers that must be removed
821from the message at arrival, before data_acl processing (and before the
822rcpt_acl warn headers are added to the message)."
823------------------------------------------------------------------------------
824
825(63) 28-Jun-02 S Access to ACL-added headers in ACLs
826Patrice Fournier
827
828"I'd like also to be able to look at the already added headers by a
829rcpt_acl when still checking rcpt_acl (either later in the acl for the same
830RCPT TO or for another RCPT TO)."
831------------------------------------------------------------------------------
832
833(65) 28-Jun-02 M Expand fallback hosts
834
835See also 174 of the Exim 3 list.
836------------------------------------------------------------------------------
837
838(66) 01-Jul-02 M Use Berkeley DB 4 concurrent access features
839
840This might give better performance on very busy sites by reducing the
841contention for access to hints databases. Rob Butler points out that this could
842also be useful to allow updates of other DB files used by Exim to happen
843concurrently. Another thing to think about with BDB is the possible use of
844B-trees.
845------------------------------------------------------------------------------
846
847(68) 01-Jul-02 S Add sender host to delivery line
848
849"Would it be possible to have a "sending_host_on_delivery" option that
850logs the IP of the sending host in the => line?" Also requested was amount of
851data transmitted for a non-delivery attempt.
852------------------------------------------------------------------------------
853
854(69) 03-Jul-02 T Log selector to log whoson checs
855Matt Bernstein
856
857"I'd quite like a log_selector option which could spot you'd done a whoson
858lookup in your DATA ACL and maybe log it as W=user."
859------------------------------------------------------------------------------
860
861(70) 09-Jul-02 S A way of changing the RCPT address in an accept router
862
863So as to avoid duplication problems when sending multiple addresses in multiple
864copies to the same address.
865------------------------------------------------------------------------------
866
867(73) 17-Jul-02 M Match a list from within a condition
868
869e.g. ${if matchdomain {$domain}{+domainlist} ...
870 ${if matchhost {$sender_host_address}{1.2.3.4/10:2.3.4.5/16}...
871
872Thought needed about how to handle host names. This may be too messy to specify
873cleanly.
874
87522-Apr-04: Implemented for domains, addresses, and local parts. Hosts are
876too messy!
f7b63901
PH
877
878The only sensible approach seems to be to allow IP address arguments only.
879Anything else should be diagnosed as an error. However, if a name appears in
880the list, a PTR lookup should be done. This may require a lot of refactoring
fc9c2317
PH
881in the code, because of the current assumption that were are (almost) always
882dealing with THE sending host.
e05f33e0
PH
883------------------------------------------------------------------------------
884
885(74) 22-Jul-02 M Extend -bV to do more semantic checking
886
887For example, diagnose "local_hosts" that should probably be "+local_hosts".
888------------------------------------------------------------------------------
889
890(75) 23-Jul-02 S Reference option on command line
891
892The idea here is that a spam scanner that re-injects a message can supply a
893reference on the command line that gets logged with R=.
894------------------------------------------------------------------------------
895
896(78) 30-Jul-02 S Expand queue_only (and/or queue_only_file)
897
898The requirement is to make it possible to queue messages if certain conditions
899are met (e.g. messages from certain local users). See also 93.
900
901This control can now be achieved in the ACL - is this still needed?
902------------------------------------------------------------------------------
903
904(79) 31-Jul-02 S Additional info for log lines
905
906An option to set an expanded string to be added to <= lines. And also for the
907other delivery lines? See also 15.
908------------------------------------------------------------------------------
909
910(84) 09-Aug-02 S Make interfaces available in a variable
911
912Something like $local_interfaces. Maybe limit the max length.
913------------------------------------------------------------------------------
914
915(85) 12-Aug-02 S/M Notice database connection failures
916
917The small version of this just removes a server from the list within a single
918Exim process when a connection to it fails. The bigger project would use the
919retry database - but that has implications for bottlenecking and may not be
920helpful. See also item 109. Another suggestion is to randomize the order in
921which database servers are tried (randomize_database_servers). And another is
922to measure response times and remember which server is fastest.
923------------------------------------------------------------------------------
924
925(87) 12-Aug-02 M Partial lookups for query-style lookups
926
927The suggestion is to allow the lookup to contain a keystring (same syntax as
928single-key lookups) which is then permuted and place in a suitable variable
929each time - $permuted_key or something.
930------------------------------------------------------------------------------
931
932(88) 20-Aug-02 S Allow special retrying for forced defer
933
934See also 146 in Exim 3 wish list above.
935------------------------------------------------------------------------------
936
937(89) 20-Aug-02 S Also allow retry rules on routers and transports
938------------------------------------------------------------------------------
939
940(90) 23-Aug-02 M Macros with arguments, a la C
941
942I don't like this, because of the cost of frequent interpretation.
943------------------------------------------------------------------------------
944
945(93) 27-Aug-02 S queue_only_condition
946Peter A. Savitch
947
948queue_only_condition global option, expanded string. This contain
949condition, which if evaluated to `no' or `false' or `0', behaves like
950queue_only (queue_only_load ?). Don't know what to do is the string
951expansion fails with DEFER (either force queueing or continue with
952immediate delivery). Another option can control Exim behaviour if the
953expansion fails. Don't know how the name for it ;-) See also 78.
954
955This control can now be achieved in the ACL - is the new feature now needed?
956------------------------------------------------------------------------------
957
958(95) 27-Aug-02 S Log all parents as a router option
959
960So that specific addresses can be logged like this. Should there be more log
961selector options per router? Per transport?
962------------------------------------------------------------------------------
963
964(99) 28-Aug-02 L Test pre-conditions in order given
965
966This would get round certain problems with require_files. However, it is
967totally incompatible, and therefore an "Exim 5" wish.
968------------------------------------------------------------------------------
969
970(101) 02-Oct-02 M Callout and <> rejections
971
972Some people don't want to fail the callout if the MAIL FROM:<> command is
973rejected. Think of a way of handling this tidily. See also 51.
974------------------------------------------------------------------------------
975
976(102) 03-Oct-02 M Log option to suppress message-id logging
977
978M because it would involve a change to eximstats.
979------------------------------------------------------------------------------
980
981(106) 09-Oct-02 S Appendfile to create directory not as user
982
983Arrange for the setup entry to appendfile to create the directory under some
984other uid (and with given owners/permissions?)
985------------------------------------------------------------------------------
986
987(109) 15-Oct-02 M Remember when LDAP (etc) servers are down
988
989The idea would be to use some kind of retry rule, just like for hosts.
990See also 85.
991------------------------------------------------------------------------------
992
993(110) 18-Oct-02 M errors_to for pipe command in filter
994
995To work in the same was as errors_to for deliver commands.
996------------------------------------------------------------------------------
997
998(113) 15-Nov-02 M support for XMLRPC
999
1000Patch supplied for 4.10 by Joel Vandal.
1001------------------------------------------------------------------------------
1002
1003(114) 04-Dec-02 M local_scan: return message on accept
1004
1005(This actually dates from earlier.) The problem with this is that the string
1006currently passes into $local_scan_data. Thus, an incompatible change of some
1007sort would be required. Possibly a global that local_scan can set?
1008------------------------------------------------------------------------------
1009
1010(118) 10-Dec-02 S access to Perl from local_scan
1011------------------------------------------------------------------------------
1012
1013(119) 12-Dec-02 M ability to specify additional headers in an autoreply
1014
1015This is so that vacation messages etc can have MIME headers that specify, for
1016example, the character set.
1017------------------------------------------------------------------------------
1018
1019(125) 02-Jan-03 M Per-host daemon logging
1020
1021"So what I would like is an option like debug_hosts, that allows to specify
1022an hostlist, and if the current incoming/outgoing hosts matches, creates a
1023logfile like $hostname_(in|out).log in my logdirectory."
1024------------------------------------------------------------------------------
1025
1026(127) 06-Jan-03 M Different messages for different callout failures
1027
1028The real requirement here is to detect when a callout "MAIL FROM:<>" failed, so
1029that a specific warning about that can be sent, different to the message when a
1030callout "RCPT TO:" fails. I think this is in fact now mostly done.
1031------------------------------------------------------------------------------
1032
1033(129) 09-Jan-03 M Keep track of DNSBL timeouts, and refrain from calling
1034
1035If so configured, keep track of DNSBL timeouts in a hints record, and don't
1036retry that DNSBL for a while after (a sufficient number of) timeouts. It is
1037effectively disabled for a while. Log enable/disable, of course. Another
1038thought is an option not to apply +defer_unknown unless *all* DNSBL lookups in
1039a list defer.
1040------------------------------------------------------------------------------
1041
1042(130) 09-Jan-03 M A number of LDAP-related things
1043Peter A. Savitch
1044
1045OpenLDAP 2.1 is going to be more popular (2.1.9 is available with many
1046bug fixes). TLS-enabled LDAP is an interesting and usefull thing.
1047I can try to implement some things and send the patches, like with
1048ldapi.
1049
1050How do You see:
1051
10521) The propagation of TLS options (key, certificate, CA certificate)
1053 to the OpenLDAP library.
1054
10552) (was dereferencing; done in 4.23).
1056------------------------------------------------------------------------------
1057
1058(131) 09-Jan-03 S Additional variables
1059Peter A. Savitch
1060
1061$root_uid Why?
1062
1063(Some that were previously here are done)
1064
1065$smtp_accept_count -- used for acl_smtp_connect
1066
1067$queue_runners -- children of the listening daemon could use this
1068 value for controlling the number of queue runners
1069
1070I don't like either of these because they cannot be real-time values. They
1071would be snapshots of the values at the time the process was forked from the
1072daemon, and I fear they would just be confusing. For processes that were not
1073forked from the daemon they couldn't be set at all.
1074------------------------------------------------------------------------------
1075
1076(131) 09-Jan-03 S Additional options
1077Peter A. Savitch
1078
1079exim_processes_max
1080exim_file_descriptors_max
1081queue_run_condition -- to deprecate queue_run_max, better system
1082 load control
1083
1084Given Exim's distributed nature, I'm not at all sure how the first two of these
1085can usefully be implemented.
1086------------------------------------------------------------------------------
1087
1088(132) 16-Jan-03 M Option for when a transport filter fails (crashes)
1089
1090Freezing is one obvious option. Currently, Exim just retries. Another user
1091wanted to retry without the filter, but that is much harder.
1092------------------------------------------------------------------------------
1093
1094(136) 24-Jan-03 M Make "personal" available as a condition for use in routers
1095------------------------------------------------------------------------------
1096
1097(138) 28-Jan-03 M A variable containing what was matched in a host list
1098
1099Or, presumably, other lists. This is so that ACL messages can say things like
1100"your host name matches xxxx". Note: not the same as $domain_data. Also, this
1101could be tricky with lookups and things that match in files.
1102------------------------------------------------------------------------------
1103
1104(143) 06-Mar-03 L Ability to have multiple authenticators of same type
1105
1106For example, to have two PLAIN authenticators; if the first fails, try the
1107second.
1108------------------------------------------------------------------------------
1109
1110(144) 07-Mar-03 T ACL control = local_scan_skip to skip the local scan
1111
1112A bigger project would be control = local_scan <xxx> where xxx could select
1113different local_scan functions (possibly by dynamic loading).
1114
1115This can now be simulated using the fact that ACL variables are preserved,
1116so it doesn't look as it once did.
1117------------------------------------------------------------------------------
1118
1119(145) 07-Mar-03 T Export string_cat() to local_scan()
1120------------------------------------------------------------------------------
1121
1122(147) 17-Mar-03 T Option to treat 5xx as 4xx if received on initial connection
1123
1124This issue is controversial. That may be a good reason for not changing
1125anything.
1126------------------------------------------------------------------------------
1127
1128(153) 25-Apr-03 S A way of making log_as_local apply to the smtp transport
1129
1130Either an option on the transport, or log_remote_as_local for the router.
1131Messy, either way. Maybe log_local_as_local and log_remote_as_local, and
1132deprecate log_as_local?
1133------------------------------------------------------------------------------
1134
1135(154) 01-May-03 M Teergrubing at the CR/LF level
1136
1137It is believed that the most effective way to teergrube is to insert a delay
1138between transmitting CR and LF in the SMTP response. Furthermore, this is also
1139the best place to test for bad synchronization (i.e. at the last possible
1140time).
1141------------------------------------------------------------------------------
1142
1143(155) 01-May-03 S "control=no_pipelining" for connect and EHLO ACLs
1144
1145Yet more flexibility! Maybe this should be a more general control for what is
1146sent in response to EHLO.
1147------------------------------------------------------------------------------
1148
1149(156) 06-May-02 M Finer-grained synchronisation checking
1150
1151On operating systems that can be asked whether any sent bytes have not yet been
1152ACK'd at the TCP/IP level, a finer-grained check for proper synchronisation can
1153be done. All bytes must have been ACK'd if the client has received the previous
1154response before sending the next command. See also 293.
1155------------------------------------------------------------------------------
1156
1157(157) 07-May-03 M Newline as a list item separator
1158
1159This will make life easier for lists obtained form databases where the
1160separator is naturally a newline.
1161------------------------------------------------------------------------------
1162
1163(158) 13-May-03 M Ability to add to OK message for SMTP commands
1164
1165For sending reasons for slow response, etc.
1166------------------------------------------------------------------------------
1167
1168(160) 19-May-03 M Remove headers using wild cards
1169------------------------------------------------------------------------------
1170
1171(162) 28-May-03 M/L Use of real numbers in filters, expansions, and options
1172
1173The motivation for this is for handling spam scores that are real numbers. The
1174questions are (a) how widely should it spread and (b) whether floating point or
1175fixed point representations should be used. And what about the eval operator?
1176------------------------------------------------------------------------------
1177
1178(164) 02-Jun-03 S Set variables for interface and port in smtp transport
1179
1180These could be useful for varying HELO data etc. See also several other
1181items about interfaces above.
1182------------------------------------------------------------------------------
1183
1184(166) 18-Jun-03 S CN verification in client TLS code
1185
1186A tls_verify_cn option is suggested by Sven Geggus.
1187------------------------------------------------------------------------------
1188
1189(168) 19-Jun-03 S Ability to add a header recording envelope rewrites
1190
1191Current code adds a deleted header with only some information. Maybe what is
1192needed is a flag for a rewrite rule.
1193------------------------------------------------------------------------------
1194
1195(169) 19-Jun-03 M A way of detecting timeouts in callout returns
1196
1197------------------------------------------------------------------------------
1198
1199(170) 23-Jun-03 S Option to accept rather than defer after local scan timeout
1200
1201Suggested patch supplied.
1202------------------------------------------------------------------------------
1203
1204(171) 23-Jun-03 S Option to make timeout a soft failure on pipe transport
1205
1206------------------------------------------------------------------------------
1207
1208(172) 23-Jun-03 M Option to make SQL query to specific server
1209
1210------------------------------------------------------------------------------
1211
1212(175) 04-Jul-03 S show_all_ancestors_in_errmsg for the redirect router
1213
1214This is the opposite of hide_child_in_errmsg in effect.
1215------------------------------------------------------------------------------
1216
1217(180) 14-Jul-03 M Extend never_users to be more flexible
1218
1219e.g. never_users = ! mailnull : ! cyrus : !mailman : 0-100
1220------------------------------------------------------------------------------
1221
1222(183) 16-Jul-03 S freeze_tell_text to add custom text to the message
1223
1224------------------------------------------------------------------------------
1225
1226(185) 24-Jul-03 S An expansion operator that decodes RFC 2047 strings
1227
1228------------------------------------------------------------------------------
1229
1230(188) 13-Aug-03 T batch_max=0 to mean unlimited
1231
1232------------------------------------------------------------------------------
1233
1234(189) 22-Aug-03 S Allow filter "logwrite" to write to syslog
1235
1236I feel this is a dangerous facility, and also of very minority interest, at
1237least for user's filters. Allowing a system filter to write to mainlog or
1238syslog may be different. However, writing the main log would only be possible
1239if the filter runs as root or exim.
1240------------------------------------------------------------------------------
1241
1242(190) 22-Aug-03 S A way of testing "forced delivery" in filter and routers
1243------------------------------------------------------------------------------
1244
1245(191) 26-Aug-03 M Preserve $address_data for a verified recipient
1246
1247The idea is to preserve it in the recipients data structure so that local_scan
1248can have access to it. The value could also be used as the initial value of
1249$address_data while routing.
1250------------------------------------------------------------------------------
1251
1252(192) 05-Sep-03 M Better handling of TXT records for dnslists
1253
1254When multiple lists are accessible via a merged lookup, handling TXT records
1255is difficult. An option for doing the TXT lookup in a sub-list has been
1256suggested, with syntax such as
1257
1258 dnslists = list.example.org=127.0.0.2%dialups \
1259 ,127.0.0.3%relays \
1260 ,127.0.0.5%spews
1261------------------------------------------------------------------------------
1262
1263(194) 10-Sep-03 M $addresslist_data to be like $host_data/$domain_data
1264
1265------------------------------------------------------------------------------
1266
1267(195) 29-Sep-03 M A variable containing the error for verify = header_syntax
1268
1269Maybe there should always be a variable with the error message for all the
1270different kinds of verify failure.
1271------------------------------------------------------------------------------
1272
1273(196) 30-Sep-03 S A way of detecting whether it was HELO or EHLO in the ACL
1274
1275$received_protocol isn't reset until after the command is accepted (which
1276seems right), and $smtp_data shows only the arguments. Maybe $smtp_command?
1277------------------------------------------------------------------------------
1278
1279(197) 30-Sep-03 S MACROS_DROP_PRIVS and ALT_CONFIG_DROP_PRIVS
1280
1281Now that alternative configurations can be restricted to certain directories,
1282some more flexibility can be allowed. Not by default, though.
1283------------------------------------------------------------------------------
1284
1285(198) 01-Oct-03 M Accept mail after local_scan() crash instead of defer
1286
1287This may not be as easy to implement as it sounds; one is never sure of the
1288environment after a crash. Is is actually a good idea? The crashing local_scan
1289may have wrecked the memory in arbitrary ways; for example, screwing up the
1290recipients list...
1291------------------------------------------------------------------------------
1292
1293(199) 01-Oct-03 M ${pipe which will pipe the message to a script ...
1294
1295... and otherwise behave as ${run. Probably needs to have locking out features
1296so that it can be turned off for users .forwards if the sysadmin so desires.
1297------------------------------------------------------------------------------
1298
1299(200) 07-Oct-03 L Alternative ways of storing hints
1300
1301People want to store hints in databases. Some assert that SQL databases can
1302be made to perform satisfactorily. If a general interface could be worked on,
1303people could at least try different strategies. See also 66 above, which is
1304specifically concerned with Berkeley DB. Another possible option is a switch to
1305disable smtp-wait hints - to avoid contention problems.
1306------------------------------------------------------------------------------
1307
1308(201) 07-Oct-03 M A "soft bounce" feature
1309
1310This is an option that turns all hard bounces into soft bounces. The idea is
1311that it can be used as a safety-net while testing configurations. Instead of a
1312local bounce, the message stays on the queue; instead of 5xx SMTP responses,
13134xx ones are given.
1314
1315The ability to do the opposite - turn 4xx into 5xx under certain circumstances
1316might also be useful (e.g. after a certain time). This might best be done by
1317extending the retry logic to recognize 4xx as a special error. (This is now
1318done.)
1319------------------------------------------------------------------------------
1320
1321(202) 10-Oct-03 S -bvsomething to do a callout after the verify
fb636a0f
PH
1322
1323For example: -bvc and -bvsc. The problem now (Nov 04) is that there are quite a
1324few possible callout options that can be specified in an ACL, and they would
1325have to be replicated here.
e05f33e0
PH
1326------------------------------------------------------------------------------
1327
1328(203) 14-Oct-03 S verify=something to easily check for header presence
1329
1330This is purely cosmetic; "condition" can already be used.
1331------------------------------------------------------------------------------
1332
1333(204) 27-Oct-03 S an inverted queue_only_file
1334
1335That is, queue if a file does NOT exist.
1336------------------------------------------------------------------------------
1337
1338(205) 27-Oct-03 S expand smtp_accept_queue_per_connection
1339
1340------------------------------------------------------------------------------
1341
1342(206) 27-Oct-03 S appendfile: a variable containing the maildir base name
1343
1344------------------------------------------------------------------------------
1345
1346(207) 29-Oct-03 S ability to keep trusted users in a file - expand it.
1347------------------------------------------------------------------------------
1348
1349(208) 31-Oct-03 M cache temporary verification errors and fail after a time
1350
1351This request was for a way of turning temporary verification failures into
1352permanent ones after some fixed time.
1353------------------------------------------------------------------------------
1354
1355(209) 31-Oct-03 S a way of making crashes in pipe commands temporary errors
1356
1357------------------------------------------------------------------------------
1358
1359(210) 31-Oct-03 S runtime option to change the daemon name used for tcprwappers
1360
1361A patch for compile time was supplied, but this seems better as a runtime
1362option, for use with multiple Exim daemons.
1363------------------------------------------------------------------------------
1364
1365(211) 31-Oct-03 S ability to disable debugging output from -bh & -bhc
1366------------------------------------------------------------------------------
1367
1368(212) 31-Oct-03 M specify headers lines in HELO ACL to be added to all msgs
1369------------------------------------------------------------------------------
1370
1371(214) 05-Nov-03 S Put the wild part of local part prefix/suffx in variables
1372
1373Unfortunately, this isn't quite as trivial as it seems.
1374------------------------------------------------------------------------------
1375
1376(215) 14-Nov-03 S A way of turning off message-submission fix-ups
1377
1378Globally, and perhaps also via an ACL control so that it can be done on a
fb636a0f
PH
1379per-message basis. Is this still needed? Since this item was added to this
1380list, default fixups for non-local messages have been removed, and control =
1381submission has been added.
e05f33e0
PH
1382------------------------------------------------------------------------------
1383
1384(215) 26-Nov-03 M/L Conversion of IDNA domain names for logging
1385
1386IDNA (RFCs 3490-3492) converts domains names containing non-ASCII characters
1387into ASCII strings of a special form. Exim will of course handle these.
1388However, it might be nice to convert them to a local code for logging. This
1389might be quite a big project: there's also output from -bp and eximon queue
1390display and no doubt other places as well. (Utilities that process the logs,
1391e.g. exigrep, eximstats, will be automatically handled if the logs are
1392changed.)
1393------------------------------------------------------------------------------
1394
1395(216) 27-Nov-03 S Option to bounce if required TLS doesn't happen
1396
1397This is for the smtp transport with hosts_require_tls set. Currently, it
1398defers. Possibly the best approach is to make the error one that can be seen by
1399the retry logic.
1400------------------------------------------------------------------------------
1401
1402(217) 27-Nov-03 M A function to pass back variables from Perl
1403
1404This is a function that can be called from Perl, to take a name and a value and
1405put that value into an Exim variable.
1406------------------------------------------------------------------------------
1407
1408(218) 01-Dec-03 M A local_scan-like hook at system filter time
1409
1410That is, make a C API available for custom filtering at this point.
1411------------------------------------------------------------------------------
1412
1413(221) 18-Dec-03 U Merge routers and ACLs - or at least make more similar
1414
1415"It will be very useful to be able to use most of the ACL conditions
1416(authenticated, hosts, senders, sender_domains, ... ) in routers and also the
1417possibility to have multiple conditions in routers. It will be great to also
1418be able to set variables in routers like in acl's." This is effectively a
1419radical suggestion for a complete re-design, and is therefore BIG.
1420------------------------------------------------------------------------------
1421
e05f33e0 1422(223) 22-Dec-03 S Support SOA lookup in dnsdb lookups
fb636a0f
PH
1423
1424This could be like zns, and climb up the tree till it hits a zone. Would the
1425name of the zone be required?
e05f33e0
PH
1426------------------------------------------------------------------------------
1427
1428(225) 22-Dec-03 M Add acl= to routers
1429
1430This would use an ACL to "control access" to a router, opening up a number
1431of interesting possibilities. Details of possible limitations need to be
1432investigated.
1433------------------------------------------------------------------------------
1434
1435(226) 23-Dec-03 S A way of treating DEFER as fail in dnsdb lookups
1436
1437(i.e. the dnsdb lookup failed, so accept the message)
1438------------------------------------------------------------------------------
1439
1440(227) 30-Jan-04 M A configuration .if facility
1441
1442"Second with the .ifdef and such, it would be nice to have a base .if,
1443so I could do something like
1444.if DEFINED_DATA == xyz
1445configuration here
1446.elseif DEFINED_DATA == abc
1447configuration here
1448.else
1449configuration here
1450.endif
1451also this would be nice at least in my case in the system filters, but
1452isn't required but you could pass the defined data to the system, in
1453variables."
1454------------------------------------------------------------------------------
1455
1456(229) 30-Jan-04 M New expansion mechanism: {list ...}
1457
1458"Proposed syntax: {list {separator}{item}{item}...}
1459This first expands the contents of {separator} and all of the {item}s,
1460then constructs a separator-delimited list. The twist is: if an {item}
1461generates the empty string, no separator will be generated for it.
1462The entire construct will fail is {separator} fails, or all {item}s
1463fail. If just some {item}s fail, they will be treated as if they
1464generated empty strings.
1465Examples:
1466 {list {,}{aaaaaa}{bbbbbb}{cccccc}} -> aaaaaa,bbbbbb,cccccc
1467 {list {,}{:fail:}{bbbbbb}{cccccc}} -> bbbbbb,cccccc
1468 {list {,}{aaaaaa}{:fail:}{cccccc}} -> aaaaaa,cccccc
1469 {list { }{aaaaaa}{bbbbbb}{}} -> aaaaaa bbbbbb
1470 {list { }{:fail:}{:fail:}{:fail:}} -> :fail:
1471 {list {:fail:}{aaaaa}{bbbb}{cccc}} -> :fail:
1472See particularly examples 2-4, which handle the case of a missing first
1473and last item with ease; doing this using {if ...} would be quite difficult!"
1474------------------------------------------------------------------------------
1475
1476(230) 30-Jan-04 M Find IP addresses of a domain's nameservers
1477
1478This needs some way of processing a list of things in a similar way, which
fc9c2317
PH
1479should perhaps be a more general facility. // This can now be done using the
1480list facilities of dnsdb; verbose, but it can be done. //
e05f33e0
PH
1481------------------------------------------------------------------------------
1482
1483(231) 30-Jan-04 ? -C has a number of problems when used for real
1484
1485-C was intended for testing; people are using it for "alternate"
1486configurations, and it doesn't work too well. Can a better way of doing this be
1487invented?
1488------------------------------------------------------------------------------
1489
1490(232) 02-Feb-04 ? Make parts of the code loadable
1491
1492The idea being that drivers, etc. could be compiled separately. There are, of
1493course, security issues. This is not something I want to go into at present.
1494------------------------------------------------------------------------------
1495
1496(235) 02-Feb-04 T Make smtp_accept_count available as a variable
1497
1498This is for use in ACLs. Of course, it is a snapshot of the count at the
fc9c2317
PH
1499start of the receiving process. As such, it could be confusing because if a
1500connection lasts a long time, the "true" value could be very different. For
1501this reason, I don't really like this idea.
e05f33e0
PH
1502------------------------------------------------------------------------------
1503
1504(236) 02-Feb-04 S String in local_scan that's added to the binary version string
1505------------------------------------------------------------------------------
1506
1507(237) 02-Feb-04 M Add_header in ACLs because "message" is overloaded
1508
1509This would be useful for verbs where "message" is an error message.
1510------------------------------------------------------------------------------
1511
1512(238) 05-Feb-04 S ${address to handle multiple addresses
1513
1514At present, ${address expects to see just one address. An extension would let
1515it handle header lines with multiple addresses, just retaining the actual
1516addresses. Or perhaps a new operator is needed?
1517------------------------------------------------------------------------------
1518
1519(239) 23-Feb-04 ? Expansion items for encryption/decryption
1520
1521Perhaps for some kind of cookie handling? This would need an external crypto
1522library, because there's no crypto code in Exim itself.
1523------------------------------------------------------------------------------
1524
1525(240) 23-Feb-04 ? Some way to know if a ip is a mx for a given domain
1526
1527Some kind of iterative operation for dnsdb might be a general way of providing
fc9c2317
PH
1528this. // This can now be done using the list facilities of dnsdb; verbose, but
1529it can be done. //
e05f33e0
PH
1530------------------------------------------------------------------------------
1531
1532(242) 01-Mar-04 ? Run a filter from an expansion condition
1533
1534This would add a lot of power to ACLs, but its implementation might be tricky
1535because of the possibility of recursion.
1536------------------------------------------------------------------------------
1537
1538(243) 01-Mar-04 ? Run an ACL from an expansion condition
1539
1540The problem here is knowing what data is available at an arbitrary time.
1541------------------------------------------------------------------------------
1542
1543(244) 01-Mar-04 ? Add an on-success event to transports
1544
1545This could just be an expansion string, whose value is either ignored or
1546logged, but it could be used to run SQL updates or run programs etc.
1547However, what is "success" when a transport has multiple recipients?
1548------------------------------------------------------------------------------
1549
1550(245) 01-Mar-04 M Add all the string expansion conditions to filters
1551
1552Some thought would be needed on how to design the syntax for this.
1553------------------------------------------------------------------------------
1554
1555(247) 09-Mar-04 S IP addresses that are never looked up
1556
1557It would be nice if we could prevent this for certain IP addresses for
1558which we _know_ we'll never get a valid PTR record, like 2002::/16.
1559So a new option might reasonably default to:
1560
1561 hosts_never_lookup = <; 2002::/16
1562------------------------------------------------------------------------------
1563
1564(253) 05-Apr-04 M Use ESMTP and TLS for recipient callout verification
1565
1566The best way to do this would involve quite a bit of refactoring so as to
1567abstract some of the code from the smtp transport into subroutines that could
1568also be used from the callout code. The tls parameters should probably be
1569taken from the transport. That might also require some substantial code
1570refactoring. See also 294.
1571------------------------------------------------------------------------------
1572
1573(260) 30-Apr-04 S Respect +tls_cipher +tls_peerdn in rejectlog entries
1574
1575------------------------------------------------------------------------------
1576
1577(261) 05-May-04 S Add a "required_version" option
1578
1579So that configurations can insist on a specific Exim version.
1580------------------------------------------------------------------------------
1581
1582(262) 10-May-04 S Add "scratch" ACL variables
1583
1584The idea is for variables that are flushed at the start of each ACL. I'm not
1585really convinced that these are worth implementing.
1586------------------------------------------------------------------------------
1587
1588(263) 10-May-04 S Add variable $router_name $transport_name
1589
1590These could be used in debug_print settings, which are output during -bt, and
1591thus don't need the privilege to run with -d.
1592------------------------------------------------------------------------------
1593
1594(265) 25-May-04 M An init.d script for exim is needed
1595
1596The old sendmail script used to "just work" because it just did -bd -q 20m or
1597whatever. Newer versions start more than one sendmail daemon, so do not work.
1598------------------------------------------------------------------------------
1599
1600(267) 25-May-04 S tarpitting delay option
1601
1602A modifier that sets a delay between lines for multiline responses.
1603------------------------------------------------------------------------------
1604
1605(268) 25-May-04 S? Add a PID to every log line
1606
1607Given that pids are reused non-cyclically these days, is this actually useful?
1608------------------------------------------------------------------------------
1609
e05f33e0
PH
1610(270) 01-Jun-04 M Add headers at top and middle
1611
1612Various initiatives like SPF and DomainKeys require header lines to be added
1613above or in the middle of existing headers. Exim always adds at the bottom.
1614When these requirements are more standard and clearer, some way of controlling
1615where header lines are added will probably become necessary. Some new syntax
1616will be required.
1617
1618This can now be done fairly generally from local_scan(), and at the start and
1619after the Received: block from an ACL. Is anything more needed?
1620------------------------------------------------------------------------------
1621
1622(271) 02-Jun-04 L Callouts at routing time
1623
1624From a user's message:
1625
1626> I would like to be able to:
1627>[...]
1628> 2) Forcing callouts as address verification at router level
1629> [ check_callout just like check_local_user ]
1630>
1631> I would like to redirect messages in some domain to "domain with callout
1632> verification" and to "domain without callout verification"
1633>
1634> e.g.
1635> userA@domain.in -> userX@doamin.out-verify (use callout to verify)
1636> userB@domain.in -> userY@doamin.out-noverify (do not use callout verify)
1637>
1638> [both out-* domains delivered via "callout ready" transports]
1639
1640Other versions of the wish:
1641* limiting callouts in acls to specific transport
1642 verify = recipient/callout=5s,transport:intranet_smtp
1643* adding "select transport" to ACL conditions
1644 accept domains = +local_domains
1645 transport = cyrus_ltcp
1646 verify = recipient/callout=5s
1647------------------------------------------------------------------------------
1648
1649(272) 07-Jun-04 S Expand hosts_randomize
1650
1651It occurs in manualroute and in smtp.
1652------------------------------------------------------------------------------
1653
1654(278) 21-Jun-04 M quota_warn_message_file option
1655
1656Similar to the bounce and delivery warn message files.
1657------------------------------------------------------------------------------
1658
1659(280) 23-Jun-04 M A way of adding a header line after callout defer_ok
1660
1661This would record that, e.g., a sender domain verified, but the callout
fb636a0f
PH
1662could not be done. There are ways of fudging this, using ACL variables and
1663"warn" statements.
e05f33e0
PH
1664------------------------------------------------------------------------------
1665
1666(285) 16-Jul-04 M Separate and independent log_selector for rejectlog
1667
1668For example: mainlog_selector and rejectlog_selector, with log_selector setting
1669both of them.
1670------------------------------------------------------------------------------
1671
1672(286) 21-Jul-04 M Distinguishing a larger number of errors
1673
1674For instance, detecting "connection reset by peer" (ENETRESET or ECONNRESET)
1675might be useful.
1676------------------------------------------------------------------------------
1677
1678(288) 10-Aug-04 M Option for verify to require MX
1679
1680e.g. verify=sender/require_mx
1681I'm not too keen because this is rather special purpose, and of course could
1682only apply if the verification happened to hit a dnslookup router.
1683------------------------------------------------------------------------------
1684
1685(289) 10-Aug-04 L Option to treat defers in database lookups as "not found"
1686
1687This is so that alternatives can be coded for when databases are down. A
1688suggested patch has been sent, but it just catches all instances of "defer"
1689from a lookup in an expansion string. These can occur for a number of different
1690reasons, not just connection failures. I think that we need a specific
1691"connection failed" indicator. Also, what about lookups in lists?
1692------------------------------------------------------------------------------
1693
1694(291) 13-Aug-04 M An ACL or "local_scan()" to be run on size excession
1695
1696The idea is to give something a chance to look at the data so far received when
1697more than message_size_limit (or some other limit) has arrived. I am not sure
1698how useful this would actually be in practice.
1699------------------------------------------------------------------------------
1700
1701(292) 13-Aug-04 M Overall timeout for message reception
1702
1703A client could in priciple keep an SMTP connection open for a very long time by
1704trickling in data very slowly. Also, after message_size_limit is exceeded, Exim
1705continues to swallow the data (though it does not write it to disk) until the
1706end is reached. Again, the connection could be held open for a very long time.
1707Some kind of overall time limit for an SMTP connection, possibly reset at the
1708start of each message, might be helpful in these situations.
1709------------------------------------------------------------------------------
1710
1711(294) 23-Aug-04 L Callouts and AUTH and LMTP
1712
1713People want to do callouts using LMTP as well as SMTP, and that would also
1714include sockets as well as TCP/IP connections. Also, people want to make use of
1715AUTH during the callout checking, on all types of connection. I suppose that
1716means making TLS available as well. This probably means a rewrite of the code
1717that actually does the callout. Should we use the relevant transport in a new
fdfdba09 1718"callout" mode instead of keeping things separate? See also 253 and 323.
461f4862
PH
1719
1720And here's another submitted idea: "My actual suggestion is that if this model
1721is followed, the parent process doesn't have to stop the callout process if it
1722is taking too long to respond: it can return 450 to the incoming connection
1723within the 5 minute SMTP command timeout and leave the callout process to
1724continue, in the hope that it will eventually get a result and store it in the
1725callout cache in time for the sender's next attempt."
e05f33e0
PH
1726------------------------------------------------------------------------------
1727
1728(296) 09-Sep-04 S Make deliver_time work for == lines as well as =>
1729
1730What about ** lines?
1731------------------------------------------------------------------------------
35f53bf6 1732
35f53bf6
PH
1733(299) 25-Oct-04 S Options to make Sieve "keep" pass to next router
1734
1735Currently, "keep" saves in the mailbox. Probably need two options, for implicit
1736and explicit keep commands.
1737------------------------------------------------------------------------------
1738
0cf417c5
PH
1739(301) 27-Oct-04 M Use an "ACL" to filter logging
1740
1741This idea was for ACL syntax to be able to "accept" or "deny" individual log
1742lines. This would make it possible to have, for example, per-host logging for
1743certain things. See also 15 above.
1744------------------------------------------------------------------------------
32aaebb6
PH
1745
1746(302) 28-Oct-04 M Expand pass_router and redirect_router
1747
1748Doing this would mean postponing the validity checks till the router was
1749actually used instead of doing them at start up. It does not seem to be a
1750facility that will be widely used.
1751------------------------------------------------------------------------------
1752
1753(303) 28-Oct-04 M Support SQL relay
1754
1755This would make it easier for packagers to support "generic SQL" without having
1756to choose which one. It can be slotted in using a MySQL interface without
1757modifying Exim, but native support would be nice.
1758------------------------------------------------------------------------------
1759
1760(304) 02-Nov-04 M A way of seeing the whole message in Perl or ${run
1761
1762At present, the headers are available in $message_headers, but only part of
1763the body is visible. The only way to pass the whole body would be as a file
1764descriptor because it can be very large. See also (42).
1765------------------------------------------------------------------------------
1766
1767(305) 02-Nov-04 M A Perl transport
1768
1769The suggestion here is that an embedded Perl function takes responsibility for
1770doing the delivery. I am not at all keen on this. One way of doing it would be
1771to implement (244), which provides an "on success" string expansion. Then
1772anyone who wants this could run that on a transport that does nothing.
1773------------------------------------------------------------------------------
b5c45968
PH
1774
1775(306) 09-Nov-04 M Make the search type partial-lsearch*@ be useful
1776
1777At present, it treats the whole key as a domain for the partial search, then
1778does the *@ thing. A more sensible plan would be something like:
1779
1780 user@company.com
1781 *@company.com
1782 user@*.company.com
1783 *@*.company.com
1784 *
1785
1786That is, try the local part and * at each of the partial domain values.
1787------------------------------------------------------------------------------
5b1fde4d
PH
1788
1789(307) 24-Nov-04 S Check the syntax of Message-ID: header lines
1790
1791This could be added to "verify=header_syntax" or, if the incompatibility is
1792felt to be too great, an additional condition, or a sub-option, could be added.
1793------------------------------------------------------------------------------
908acc4e
PH
1794
1795(308) 24-Nov-04 S Add $body_longlinecount and $header_longlinecount
1796
1797These variables would hold the number of physical lines in the body and header
1798that were longer than 998 bytes. This would be fiddly to implement because of
1799the way Exim currently reads the input. It isn't just a trivial patch.
1800------------------------------------------------------------------------------
a78fb8ef
PH
1801
1802(309) 01-Dec-04 S/M Queue runners should get locks before forking
1803
1804If a queue-runner opened the -D file and took out the lock before forking, it
1805would waste fewer resources if the message was already being delivered. But how
1806often would this actually matter in practice?
1807------------------------------------------------------------------------------
fbbf1e99
PH
1808
1809(310) 06-Dec-04 S After "personal" save what matched
1810
1811The idea is to save the email address that actually was found in the message
1812in a variable so it can be used (e.g. as the From: address in an autoreply).
1813------------------------------------------------------------------------------
59e88703
PH
1814
1815(311) 07-Dec-04 ? More flexible SMTP response codes
1816
1817The requestor wanted to be able to specify, for example, 551 in an ACL deny
1818instead of 550, and also vary the defer code. The first digit, however, should
1819remain fixed. In addition to main codes, enhanced status codes (RFC 2034) were
1820requested. (As far as I can tell, they have never been highly popular.)
1821------------------------------------------------------------------------------
f7b63901
PH
1822
1823(312) 10-Dec-04 ? Shadow remote transports
1824
1825Unless a lot of work is done, this would be restricted to another remote
1826transport. A similar effect could therefore be achieved with "shadow_hosts"
1827which are like fallback_hosts but which operate on success.
1828------------------------------------------------------------------------------
23fd96b1
PH
1829
1830(313) 21-Jan-05 ? Multiple queues
1831
1832Exim runs poorly if its queue gets too big. Various ways round this are all
1833to some extent kludges. There has been a suggestion of using multiple
1834directories instead of just "input". (Originally it was for a whole set of
1835spool directories, but that introduces complications with the hint files.)
1836On message arrival, somehow a selection of "input" must be made. Then queue
1837runners must be startable for the different "queues". Don't forget that the
1838"msglog" directory is also involved. Perhaps add a new level of indirection:
1839/var/spool/exim/queue1/{input,msglog}, /var/spool/exim/queue2/....
1840------------------------------------------------------------------------------
7163d8cf
PH
1841
1842(314) 15-Feb-05 M Multiple headers_{add,remove} for routers
1843
1844If headers_{add,remove} could be specified multiple times, it would be easier
1845for those people that construct configs using .ifdef or .include, etc.
1846------------------------------------------------------------------------------
54a4fbd5
PH
1847
1848(315) 15-Feb-05 M String variables for use in filters.
1849
1850Currently, only numerical variables are supported.
1851------------------------------------------------------------------------------
46c23dba
PH
1852
1853(316) 21-Feb-05 M Put callout response into a variable
1854
1855When a callout fails, put the entire SMTP response into a variable. This is not
1856trivial because we probably should retain it in the cache as well.
1857------------------------------------------------------------------------------
a6c11ddf
PH
1858
1859(317) 25-Feb-05 S Delete the pid file when the daemon exits
1860
1861At least try to catch some of the exit routes from the daemon and either delete
1862or empty the pid file.
1863------------------------------------------------------------------------------
09a23feb 1864
6758c780 1865(318) 02-Mar-05 S Add current connection count to daemon's exiwhat output
09a23feb 1866------------------------------------------------------------------------------
6758c780
PH
1867
1868(319) 03-Mar-05 ? Allow file rather than directory for scanning call
1869
1870"I can call arbitrary scanning software by specifying the full path. I can pass
1871a directory to be scanned in the arguments. I'd like to be able to pass a
1872specific file name instead of a directory. I think this would allow me to call
1873Bogofilter at smtp time. Bogofilter requires a filename, not a directory. The
1874file would contain the complete email. I suppose there may be other scanning
1875solutions with a similar requirement."
1876------------------------------------------------------------------------------
1877
1878(320) 03-Mar-05 T Options to control daemon retry binding
1879
1880Currently the daemon tries 10 times at 30-second intervals to listen on an IP
1881address. The wish is for options to control these numbers.
1882------------------------------------------------------------------------------
45b1794b
PH
1883
1884(321) 07-Mar-05 S Run an ACL on a sync error
1885
1886... and possibly "accept" or "deny" it.
1887------------------------------------------------------------------------------
596875b3
PH
1888
1889(322) 15-Mar-05 M Add a /defer_ok option to verify=reverse_host_lookup
1890------------------------------------------------------------------------------
fdfdba09
PH
1891
1892(323) 15-Mar-05 M Make callouts use smtp_data from the smtp transport
1893
1894This is yet another problem caused by duplicating the SMTP code between the
1895transport and the callout verification. See item 294 above. Merging the
1896transport and the callout code could prevent this kind of thing from happening.
1897------------------------------------------------------------------------------
fb6f3d5c
PH
1898
1899(324) 04-Apr-05 ? Make -bP show ACLs
1900
1901This is in the Bugzilla as #10.
1902------------------------------------------------------------------------------
4e714aed
PH
1903
1904(325) 28-Apr-05 ? Support for quotas over 2G in appendfile.
1905
1906Things get bigger far more quickly than I ever imagine...
1907------------------------------------------------------------------------------
f331f3b6
PH
1908
1909(326) 03-May-05 ? Queue-only on memory shortage
1910
1911This is bugzilla #17. The idea is to have something like queue_only_load that
1912triggers on a shortage of main memory.
1913------------------------------------------------------------------------------
f0884f39
PH
1914
1915(327) 06-May-05 ? Break delay if connection drops
1916
1917Currently, "delay=5m" (e.g.) waits for 5 minutes. If we can detect that the
1918connection has died in the meantime, it would make sense to break the delay.
1919------------------------------------------------------------------------------
1920--- HWM 327 ------------------------------------------------------------------
e05f33e0 1921---------------------------- End of WishList ---------------------------------