Commit | Line | Data |
---|---|---|
495ae4b0 PH |
1 | New Features in Exim |
2 | -------------------- | |
3 | ||
38a0a95f PH |
4 | This file contains descriptions of new features that have been added to Exim. |
5 | Before a formal release, there may be quite a lot of detail so that people can | |
33f316f2 | 6 | test from the snapshots or the Git before the documentation is updated. Once |
38a0a95f PH |
7 | the documentation is updated, this file is reduced to a short list. |
8 | ||
856d1e16 PP |
9 | Version 4.90 |
10 | ------------ | |
11 | ||
12 | 1. PKG_CONFIG_PATH can now be set in Local/Makefile; | |
13 | wildcards will be expanded, values are collapsed. | |
14 | ||
8de9db65 JH |
15 | 2. The ${readsocket } expansion now takes an option to not shutdown the |
16 | connection after sending the query string. The default remains to do so. | |
17 | ||
875512a3 JH |
18 | 3. An smtp transport option "hosts_noproxy_tls" to control whether multiple |
19 | deliveries on a single TCP connection can maintain a TLS connection | |
20 | open. By default disabled for all hosts, doing so saves the cost of | |
21 | making new TLS sessions, at the cost of having to proxy the data via | |
22 | another process. Logging is also affected. | |
23 | ||
71b32d41 ACK |
24 | 4. A malware connection type for the FPSCAND protocol. |
25 | ||
57cc2785 JH |
26 | 5. An option for recipient verify callouts to hold the connection open for |
27 | further recipients and for delivery. | |
28 | ||
6e411084 PP |
29 | 6. The reproducible build $SOURCE_DATE_EPOCH environment variable is now |
30 | supported. | |
31 | ||
328c5688 JH |
32 | 7. Optionally, an alternate format for spool data-files which matches the |
33 | wire format - meaning more efficient reception and transmission (at the | |
34 | cost of difficulty with standard Unix tools). Only used for messages | |
35 | received using the ESMTP CHUNKING option, and when a new main-section | |
36 | option "spool_wireformat" (false by default) is set. | |
37 | ||
f33875c3 PP |
38 | 8. New main configuration option "commandline_checks_require_admin" to |
39 | restrict who can use various introspection options. | |
40 | ||
d291c767 HSHR |
41 | 9. New option modifier "no_check" for quota and quota_filecount |
42 | appendfile transport. | |
43 | ||
a09f2942 JH |
44 | 10. Variable $smtp_command_history returning a comma-sep list of recent |
45 | SMTP commands. | |
46 | ||
0f1a8658 JH |
47 | 11. Millisecond timetamps in logs, on log_selector "millisec". Also affects |
48 | log elements QT, DT and D, and timstamps in debug output. | |
571b2715 | 49 | |
a2673768 JH |
50 | 12. TCP Fast Open logging. As a server, logs when the SMTP banner was sent |
51 | while still in SYN_RECV state; as a client logs when the connection | |
7d6ea1cd JH |
52 | is opened with a TFO cookie. Support varies between platforms |
53 | (Linux does both. FreeBSD server only, others unknown). | |
a2673768 | 54 | |
9e70917d JH |
55 | 13. DKIM support for multiple signing, by domain and/or key-selector. |
56 | DKIM support for multiple hashes. | |
d73e45df | 57 | |
c4d5e329 HSHR |
58 | 14. Exipick understands -C|--config for an alternative Exim |
59 | configuration file. | |
60 | ||
856d1e16 | 61 | |
fd047340 JH |
62 | Version 4.89 |
63 | ------------ | |
64 | ||
33f316f2 HSHR |
65 | 1. Allow relative config file names for ".include" |
66 | ||
64073d9c JH |
67 | 2. A main-section config option "debug_store" to control the checks on |
68 | variable locations during store-reset. Normally false but can be enabled | |
69 | when a memory corrution issue is suspected on a production system. | |
70 | ||
fd047340 | 71 | |
8d042305 JH |
72 | Version 4.88 |
73 | ------------ | |
74 | ||
fc16abb4 | 75 | 1. The new perl_taintmode option allows to run the embedded perl |
2f680c0c HSHR |
76 | interpreter in taint mode. |
77 | ||
fc16abb4 JH |
78 | 2. New log_selector: dnssec, adds a "DS" tag to acceptance and delivery lines. |
79 | ||
b0d68adc JH |
80 | 3. Speculative debugging, via a "kill" option to the "control=debug" ACL |
81 | modifier. | |
82 | ||
6e773413 JH |
83 | 4. New expansion item ${sha3:<string>} / ${sha3_<N>:<string>}. |
84 | N can be 224, 256 (default), 384, 512. | |
85 | With GnuTLS 3.5.0 or later, only. | |
86 | ||
f59aaaaa | 87 | 5. Facility for named queues: A command-line argument can specify |
55e70e76 | 88 | the queue name for a queue operation, and an ACL modifier can set |
0cd5fd23 JH |
89 | the queue to be used for a message. A $queue_name variable gives |
90 | visibility. | |
28b3821f | 91 | |
03ca21f8 JH |
92 | 6. New expansion operators base32/base32d. |
93 | ||
44bc8f0c | 94 | 7. The CHUNKING ESMTP extension from RFC 3030. May give some slight |
7e3ce68e | 95 | performance increase and network load decrease. Main config option |
15021e11 JH |
96 | chunking_advertise_hosts, and smtp transport option hosts_try_chunking |
97 | for control. | |
7e3ce68e | 98 | |
5bde3efa ACK |
99 | 8. LMDB lookup support, as Experimental. Patch supplied by Andrew Colin Kissa. |
100 | ||
3367f8c2 JH |
101 | 9. Expansion operator escape8bit, like escape but not touching newline etc.. |
102 | ||
fbbd45ff | 103 | 10. Feature macros, generated from compile options. All start with "_HAVE_" |
4945f557 | 104 | and go on with some roughly recognisable name. Driver macros, for |
383832ef | 105 | router, transport and authentication drivers; names starting with "_DRIVER_". |
4945f557 JH |
106 | Option macros, for each configuration-file option; all start with "_OPT_". |
107 | Use the "-bP macros" command-line option to see what is present. | |
fbbd45ff | 108 | |
dcb72db9 JH |
109 | 11. Integer values for options can take a "G" multiplier. |
110 | ||
ff5929e3 JH |
111 | 12. defer=pass option for the ACL control cutthrough_delivery, to reflect 4xx |
112 | returns from the target back to the initiator, rather than spooling the | |
113 | message. | |
114 | ||
317e40ac PP |
115 | 13. New built-in constants available for tls_dhparam and default changed. |
116 | ||
3369a853 ACK |
117 | 14. If built with EXPERIMENTAL_QUEUEFILE, a queuefile transport, for writing |
118 | out copies of the message spool files for use by 3rd-party scanners. | |
119 | ||
fb05276a JH |
120 | 15. A new option on the smtp transport, hosts_try_fastopen. If the system |
121 | supports it (on Linux it must be enabled in the kernel by the sysadmin) | |
122 | try to use RFC 7413 "TCP Fast Open". No data is sent on the SYN segment | |
123 | but it permits a peer that also supports the facility to send its SMTP | |
124 | banner immediately after the SYN,ACK segment rather then waiting for | |
125 | another ACK - so saving up to one roundtrip time. Because it requires | |
126 | previous communication with the peer (we save a cookie from it) this | |
f59aaaaa | 127 | will only become active on frequently-contacted destinations. |
fb05276a | 128 | |
446415f5 HSHR |
129 | 16. A new syslog_pid option to suppress PID duplication in syslog lines. |
130 | ||
8d042305 | 131 | |
0d9b78be JH |
132 | Version 4.87 |
133 | ------------ | |
134 | ||
f38917cc JH |
135 | 1. The ACL conditions regex and mime_regex now capture substrings |
136 | into numeric variables $regex1 to 9, like the "match" expansion condition. | |
137 | ||
055e2cb4 JH |
138 | 2. New $callout_address variable records the address used for a spam=, |
139 | malware= or verify= callout. | |
140 | ||
fa41615d JH |
141 | 3. Transports now take a "max_parallel" option, to limit concurrency. |
142 | ||
fc4a7f70 JH |
143 | 4. Expansion operators ${ipv6norm:<string>} and ${ipv6denorm:<string>}. |
144 | The latter expands to a 8-element colon-sep set of hex digits including | |
145 | leading zeroes. A trailing ipv4-style dotted-decimal set is converted | |
146 | to hex. Pure ipv4 addresses are converted to IPv4-mapped IPv6. | |
147 | The former operator strips leading zeroes and collapses the longest | |
148 | set of 0-groups to a double-colon. | |
149 | ||
240c288f JH |
150 | 5. New "-bP config" support, to dump the effective configuration. |
151 | ||
abe1010c JH |
152 | 6. New $dkim_key_length variable. |
153 | ||
9aa35e9c | 154 | 7. New base64d and base64 expansion items (the existing str2b64 being a |
59b87190 | 155 | synonym of the latter). Add support in base64 for certificates. |
9aa35e9c | 156 | |
62b7cd08 | 157 | 8. New main configuration option "bounce_return_linesize_limit" to |
f59aaaaa | 158 | avoid oversize bodies in bounces. The default value matches RFC |
62b7cd08 JH |
159 | limits. |
160 | ||
3615fa9a HSHR |
161 | 9. New $initial_cwd expansion variable. |
162 | ||
0d9b78be | 163 | |
71224040 JH |
164 | Version 4.86 |
165 | ------------ | |
166 | ||
167 | 1. Support for using the system standard CA bundle. | |
168 | ||
169 | 2. New expansion items $config_file, $config_dir, containing the file | |
170 | and directory name of the main configuration file. Also $exim_version. | |
171 | ||
b6fbf22d JH |
172 | 3. New "malware=" support for Avast. |
173 | ||
cc00f4af JH |
174 | 4. New "spam=" variant option for Rspamd. |
175 | ||
176 | 5. Assorted options on malware= and spam= scanners. | |
177 | ||
f59aaaaa | 178 | 6. A command-line option to write a comment into the logfile. |
cc00f4af | 179 | |
7eb6c37c | 180 | 7. If built with EXPERIMENTAL_SOCKS feature enabled, the smtp transport can |
3c8b3577 JH |
181 | be configured to make connections via socks5 proxies. |
182 | ||
183 | 8. If built with EXPERIMENTAL_INTERNATIONAL, support is included for | |
184 | the transmission of UTF-8 envelope addresses. | |
7eb6c37c | 185 | |
ed0512a1 JH |
186 | 9. If built with EXPERIMENTAL_INTERNATIONAL, an expansion item for a commonly |
187 | used encoding of Maildir folder names. | |
188 | ||
b3ef41c9 | 189 | 10. A logging option for slow DNS lookups. |
846430d9 | 190 | |
089fc87a JH |
191 | 11. New ${env {<variable>}} expansion. |
192 | ||
b3ef41c9 JH |
193 | 12. A non-SMTP authenticator using information from TLS client certificates. |
194 | ||
10ca4f1c | 195 | 13. Main option "tls_eccurve" for selecting an Elliptic Curve for TLS. |
65463bc9 | 196 | Patch originally by Wolfgang Breyha. |
10ca4f1c | 197 | |
09b80b4e JH |
198 | 14. Main option "dns_trust_aa" for trusting your local nameserver at the |
199 | same level as DNSSEC. | |
200 | ||
7eb6c37c | 201 | |
533fe9b8 TL |
202 | Version 4.85 |
203 | ------------ | |
204 | ||
205 | 1. If built with EXPERIMENTAL_DANE feature enabled, Exim will follow the | |
f59aaaaa | 206 | DANE SMTP draft to assess a secure chain of trust of the certificate |
533fe9b8 TL |
207 | used to establish the TLS connection based on a TLSA record in the |
208 | domain of the sender. | |
209 | ||
210 | 2. The EXPERIMENTAL_TPDA feature has been renamed to EXPERIMENTAL_EVENT | |
211 | and several new events have been created. The reason is because it has | |
212 | been expanded beyond just firing events during the transport phase. Any | |
213 | existing TPDA transport options will have to be rewritten to use a new | |
214 | $event_name expansion variable in a condition. Refer to the | |
215 | experimental-spec.txt for details and examples. | |
216 | ||
217 | 3. The EXPERIMENTAL_CERTNAMES features is an enhancement to verify that | |
218 | server certs used for TLS match the result of the MX lookup. It does | |
219 | not use the same mechanism as DANE. | |
220 | ||
221 | ||
1f0ebb98 TL |
222 | Version 4.84 |
223 | ------------ | |
224 | ||
225 | ||
6ece2e77 TL |
226 | Version 4.83 |
227 | ------------ | |
228 | ||
a3c86431 TL |
229 | 1. If built with the EXPERIMENTAL_PROXY feature enabled, Exim can be |
230 | configured to expect an initial header from a proxy that will make the | |
231 | actual external source IP:host be used in exim instead of the IP of the | |
232 | proxy that is connecting to it. | |
233 | ||
770747fd MFM |
234 | 2. New verify option header_names_ascii, which will check to make sure |
235 | there are no non-ASCII characters in header names. Exim itself handles | |
236 | those non-ASCII characters, but downstream apps may not, so Exim can | |
237 | detect and reject if those characters are present. | |
238 | ||
b9c2e32f AR |
239 | 3. New expansion operator ${utf8clean:string} to replace malformed UTF8 |
240 | codepoints with valid ones. | |
241 | ||
b1f8e4f8 JH |
242 | 4. New malware type "sock". Talks over a Unix or TCP socket, sending one |
243 | command line and matching a regex against the return data for trigger | |
007a2dee | 244 | and a second regex to extract malware_name. The mail spoolfile name can |
b1f8e4f8 JH |
245 | be included in the command line. |
246 | ||
dc4dc04e JH |
247 | 5. The smtp transport now supports options "tls_verify_hosts" and |
248 | "tls_try_verify_hosts". If either is set the certificate verification | |
249 | is split from the encryption operation. The default remains that a failed | |
250 | verification cancels the encryption. | |
214042d2 | 251 | |
deae092e HS |
252 | 6. New SERVERS override of default ldap server list. In the ACLs, an ldap |
253 | lookup can now set a list of servers to use that is different from the | |
254 | default list. | |
255 | ||
8d91c6dc LT |
256 | 7. New command-line option -C for exiqgrep to specify alternate exim.conf |
257 | file when searching the queue. | |
258 | ||
f2de3a33 | 259 | 8. OCSP now supports GnuTLS also, if you have version 3.1.3 or later of that. |
2b4a568d | 260 | |
578897ea JH |
261 | 9. Support for DNSSEC on outbound connections. |
262 | ||
9d1c15ef | 263 | 10. New variables "tls_(in,out)_(our,peer)cert" and expansion item |
6a8a60e0 | 264 | "certextract" to extract fields from them. Hash operators md5 and sha1 |
9ef9101c JH |
265 | work over them for generating fingerprints, and a new sha256 operator |
266 | for them added. | |
9d1c15ef | 267 | |
8ccd00b1 JH |
268 | 11. PRDR is now supported dy default. |
269 | ||
f2de3a33 JH |
270 | 12. OCSP stapling is now supported by default. |
271 | ||
272 | 13. If built with the EXPERIMENTAL_DSN feature enabled, Exim will output | |
4c04137d | 273 | Delivery Status Notification messages in MIME format, and negotiate |
f2de3a33 JH |
274 | DSN features per RFC 3461. |
275 | ||
6ece2e77 | 276 | |
2c422e6f | 277 | Version 4.82 |
98a90c36 PP |
278 | ------------ |
279 | ||
280 | 1. New command-line option -bI:sieve will list all supported sieve extensions | |
281 | of this Exim build on standard output, one per line. | |
282 | ManageSieve (RFC 5804) providers managing scripts for use by Exim should | |
283 | query this to establish the correct list to include in the protocol's | |
284 | SIEVE capability line. | |
285 | ||
12f69989 PP |
286 | 2. If the -n option is combined with the -bP option, then the name of an |
287 | emitted option is not output, only the value (if visible to you). | |
288 | For instance, "exim -n -bP pid_file_path" should just emit a pathname | |
289 | followed by a newline, and no other text. | |
290 | ||
54c90be1 PP |
291 | 3. When built with SUPPORT_TLS and USE_GNUTLS, the SMTP transport driver now |
292 | has a "tls_dh_min_bits" option, to set the minimum acceptable number of | |
293 | bits in the Diffie-Hellman prime offered by a server (in DH ciphersuites) | |
294 | acceptable for security. (Option accepted but ignored if using OpenSSL). | |
295 | Defaults to 1024, the old value. May be lowered only to 512, or raised as | |
296 | far as you like. Raising this may hinder TLS interoperability with other | |
297 | sites and is not currently recommended. Lowering this will permit you to | |
298 | establish a TLS session which is not as secure as you might like. | |
299 | ||
300 | Unless you really know what you are doing, leave it alone. | |
301 | ||
1f4a55da | 302 | 4. If not built with DISABLE_DNSSEC, Exim now has the main option |
0fbd9bff | 303 | dns_dnssec_ok; if set to 1 then Exim will initialise the resolver library |
1f4a55da PP |
304 | to send the DO flag to your recursive resolver. If you have a recursive |
305 | resolver, which can set the Authenticated Data (AD) flag in results, Exim | |
0fbd9bff PP |
306 | can now detect this. Exim does not perform validation itself, instead |
307 | relying upon a trusted path to the resolver. | |
1f4a55da PP |
308 | |
309 | Current status: work-in-progress; $sender_host_dnssec variable added. | |
310 | ||
36a3ae5f PP |
311 | 5. DSCP support for outbound connections: on a transport using the smtp driver, |
312 | set "dscp = ef", for instance, to cause the connections to have the relevant | |
13363eba PP |
313 | DSCP (IPv4 TOS or IPv6 TCLASS) value in the header. |
314 | ||
315 | Similarly for inbound connections, there is a new control modifier, dscp, | |
316 | so "warn control = dscp/ef" in the connect ACL, or after authentication. | |
317 | ||
318 | Supported values depend upon system libraries. "exim -bI:dscp" to list the | |
319 | ones Exim knows of. You can also set a raw number 0..0x3F. | |
36a3ae5f | 320 | |
f4ee74ac PP |
321 | 6. The -G command-line flag is no longer ignored; it is now equivalent to an |
322 | ACL setting "control = suppress_local_fixups". The -L command-line flag | |
323 | is now accepted and forces use of syslog, with the provided tag as the | |
324 | process name. A few other flags used by Sendmail are now accepted and | |
325 | ignored. | |
326 | ||
976b7e9f | 327 | 7. New cutthrough routing feature. Requested by a "control = cutthrough_delivery" |
4c04137d | 328 | ACL modifier; works for single-recipient mails which are received on and |
976b7e9f JH |
329 | deliverable via SMTP. Using the connection made for a recipient verify, |
330 | if requested before the verify, or a new one made for the purpose while | |
331 | the inbound connection is still active. The bulk of the mail item is copied | |
332 | direct from the inbound socket to the outbound (as well as the spool file). | |
333 | When the source notifies the end of data, the data acceptance by the destination | |
4c04137d | 334 | is negotiated before the acceptance is sent to the source. If the destination |
976b7e9f JH |
335 | does not accept the mail item, for example due to content-scanning, the item |
336 | is not accepted from the source and therefore there is no need to generate | |
337 | a bounce mail. This is of benefit when providing a secondary-MX service. | |
338 | The downside is that delays are under the control of the ultimate destination | |
339 | system not your own. | |
340 | ||
4c04137d | 341 | The Received-by: header on items delivered by cutthrough is generated |
042eb971 | 342 | early in reception rather than at the end; this will affect any timestamp |
976b7e9f JH |
343 | included. The log line showing delivery is recorded before that showing |
344 | reception; it uses a new ">>" tag instead of "=>". | |
06a6f4ed | 345 | |
976b7e9f JH |
346 | To support the feature, verify-callout connections can now use ESMTP and TLS. |
347 | The usual smtp transport options are honoured, plus a (new, default everything) | |
348 | hosts_verify_avoid_tls. | |
349 | ||
350 | New variable families named tls_in_cipher, tls_out_cipher etc. are introduced | |
351 | for specific access to the information for each connection. The old names | |
352 | are present for now but deprecated. | |
353 | ||
fcc8e047 | 354 | Not yet supported: IGNOREQUOTA, SIZE, PIPELINING. |
976b7e9f | 355 | |
a64a3dfa JH |
356 | 8. New expansion operators ${listnamed:name} to get the content of a named list |
357 | and ${listcount:string} to count the items in a list. | |
98a90c36 | 358 | |
2519e60d | 359 | 9. New global option "gnutls_allow_auto_pkcs11", defaults false. The GnuTLS |
a5f239e4 PP |
360 | rewrite in 4.80 combines with GnuTLS 2.12.0 or later, to autoload PKCS11 |
361 | modules. For some situations this is desirable, but we expect admin in | |
362 | those situations to know they want the feature. More commonly, it means | |
363 | that GUI user modules get loaded and are broken by the setuid Exim being | |
364 | unable to access files specified in environment variables and passed | |
365 | through, thus breakage. So we explicitly inhibit the PKCS11 initialisation | |
366 | unless this new option is set. | |
367 | ||
2519e60d TL |
368 | Some older OS's with earlier versions of GnuTLS might not have pkcs11 ability, |
369 | so have also added a build option which can be used to build Exim with GnuTLS | |
370 | but without trying to use any kind of PKCS11 support. Uncomment this in the | |
371 | Local/Makefile: | |
372 | ||
373 | AVOID_GNUTLS_PKCS11=yes | |
374 | ||
3e8abda0 | 375 | 10. The "acl = name" condition on an ACL now supports optional arguments. |
bef3ea7f JH |
376 | New expansion item "${acl {name}{arg}...}" and expansion condition |
377 | "acl {{name}{arg}...}" are added. In all cases up to nine arguments | |
378 | can be used, appearing in $acl_arg1 to $acl_arg9 for the called ACL. | |
379 | Variable $acl_narg contains the number of arguments. If the ACL sets | |
380 | a "message =" value this becomes the result of the expansion item, | |
381 | or the value of $value for the expansion condition. If the ACL returns | |
382 | accept the expansion condition is true; if reject, false. A defer | |
383 | return results in a forced fail. | |
a5f239e4 | 384 | |
846726c5 JH |
385 | 11. Routers and transports can now have multiple headers_add and headers_remove |
386 | option lines. The concatenated list is used. | |
387 | ||
e7568d51 TL |
388 | 12. New ACL modifier "remove_header" can remove headers before message gets |
389 | handled by routers/transports. | |
390 | ||
3a796370 JH |
391 | 13. New dnsdb lookup pseudo-type "a+". A sequence of "a6" (if configured), |
392 | "aaaa" and "a" lookups is done and the full set of results returned. | |
393 | ||
362145b5 | 394 | 14. New expansion variable $headers_added with content from ACL add_header |
85ffcba6 | 395 | modifier (but not yet added to message). |
362145b5 | 396 | |
bd0fff00 | 397 | 15. New 8bitmime status logging option for received messages. Log field "M8S". |
3c0a92dc | 398 | |
c8e2fc1e JH |
399 | 16. New authenticated_sender logging option, adding to log field "A". |
400 | ||
181d9bf8 | 401 | 17. New expansion variables $router_name and $transport_name. Useful |
f59aaaaa | 402 | particularly for debug_print as -bt command-line option does not |
2a47f028 | 403 | require privilege whereas -d does. |
181d9bf8 | 404 | |
fd98a5c6 JH |
405 | 18. If built with EXPERIMENTAL_PRDR, per-recipient data responses per a |
406 | proposed extension to SMTP from Eric Hall. | |
407 | ||
700d22f3 PP |
408 | 19. The pipe transport has gained the force_command option, to allow |
409 | decorating commands from user .forward pipe aliases with prefix | |
410 | wrappers, for instance. | |
411 | ||
fcc8e047 JH |
412 | 20. Callout connections can now AUTH; the same controls as normal delivery |
413 | connections apply. | |
414 | ||
b1f37849 TL |
415 | 21. Support for DMARC, using opendmarc libs, can be enabled. It adds new |
416 | options: dmarc_forensic_sender, dmarc_history_file, and dmarc_tld_file. | |
417 | It adds new expansion variables $dmarc_ar_header, $dmarc_status, | |
418 | $dmarc_status_text, and $dmarc_used_domain. It adds a new acl modifier | |
419 | dmarc_status. It adds new control flags dmarc_disable_verify and | |
687cac44 HSHR |
420 | dmarc_enable_forensic. The default for the dmarc_tld_file option is |
421 | "/etc/exim/opendmarc.tlds" and can be changed via EDITME. | |
b1f37849 TL |
422 | |
423 | 22. Add expansion variable $authenticated_fail_id, which is the username | |
424 | provided to the authentication method which failed. It is available | |
425 | for use in subsequent ACL processing (typically quit or notquit ACLs). | |
426 | ||
4c04137d | 427 | 23. New ACL modifier "udpsend" can construct a UDP packet to send to a given |
7142daca PP |
428 | UDP host and port. |
429 | ||
430 | 24. New ${hexquote:..string..} expansion operator converts non-printable | |
431 | characters in the string to \xNN form. | |
432 | ||
1a7b746d TL |
433 | 25. Experimental TPDA (Transport Post Delivery Action) function added. |
434 | Patch provided by Axel Rau. | |
435 | ||
4dd78911 TL |
436 | 26. Experimental Redis lookup added. Patch provided by Warren Baker. |
437 | ||
181d9bf8 | 438 | |
b1770b6e | 439 | Version 4.80 |
c1e794ba PP |
440 | ------------ |
441 | ||
442 | 1. New authenticator driver, "gsasl". Server-only (at present). | |
443 | This is a SASL interface, licensed under GPL, which can be found at | |
444 | http://www.gnu.org/software/gsasl/. | |
445 | This system does not provide sources of data for authentication, so | |
3b4f55a3 | 446 | careful use needs to be made of the conditions in Exim. |
c1e794ba | 447 | |
97753960 PP |
448 | 2. New authenticator driver, "heimdal_gssapi". Server-only. |
449 | A replacement for using cyrus_sasl with Heimdal, now that $KRB5_KTNAME | |
450 | is no longer honoured for setuid programs by Heimdal. Use the | |
451 | "server_keytab" option to point to the keytab. | |
452 | ||
252e0c7b PP |
453 | 3. The "pkg-config" system can now be used when building Exim to reference |
454 | cflags and library information for lookups and authenticators, rather | |
455 | than having to update "CFLAGS", "AUTH_LIBS", "LOOKUP_INCLUDE" and | |
7e6a8985 PP |
456 | "LOOKUP_LIBS" directly. Similarly for handling the TLS library support |
457 | without adjusting "TLS_INCLUDE" and "TLS_LIBS". | |
252e0c7b | 458 | |
6a6084f8 PP |
459 | In addition, setting PCRE_CONFIG=yes will query the pcre-config tool to |
460 | find the headers and libraries for PCRE. | |
461 | ||
f1e05cc7 | 462 | 4. New expansion variable $tls_bits. |
20aa9dbd | 463 | |
4a6a987a PP |
464 | 5. New lookup type, "dbmjz". Key is an Exim list, the elements of which will |
465 | be joined together with ASCII NUL characters to construct the key to pass | |
3b4f55a3 PP |
466 | into the DBM library. Can be used with gsasl to access sasldb2 files as |
467 | used by Cyrus SASL. | |
4a6a987a | 468 | |
da3ad30d PP |
469 | 6. OpenSSL now supports TLS1.1 and TLS1.2 with OpenSSL 1.0.1. |
470 | ||
471 | Avoid release 1.0.1a if you can. Note that the default value of | |
472 | "openssl_options" is no longer "+dont_insert_empty_fragments", as that | |
473 | increased susceptibility to attack. This may still have interoperability | |
474 | implications for very old clients (see version 4.31 change 37) but | |
475 | administrators can choose to make the trade-off themselves and restore | |
476 | compatibility at the cost of session security. | |
477 | ||
7be682ca PP |
478 | 7. Use of the new expansion variable $tls_sni in the main configuration option |
479 | tls_certificate will cause Exim to re-expand the option, if the client | |
480 | sends the TLS Server Name Indication extension, to permit choosing a | |
481 | different certificate; tls_privatekey will also be re-expanded. You must | |
482 | still set these options to expand to valid files when $tls_sni is not set. | |
3f0945ff PP |
483 | |
484 | The SMTP Transport has gained the option tls_sni, which will set a hostname | |
485 | for outbound TLS sessions, and set $tls_sni too. | |
486 | ||
487 | A new log_selector, +tls_sni, has been added, to log received SNI values | |
488 | for Exim as a server. | |
489 | ||
9cbad13b PP |
490 | 8. The existing "accept_8bitmime" option now defaults to true. This means |
491 | that Exim is deliberately not strictly RFC compliant. We're following | |
492 | Dan Bernstein's advice in http://cr.yp.to/smtp/8bitmime.html by default. | |
493 | Those who disagree, or know that they are talking to mail servers that, | |
494 | even today, are not 8-bit clean, need to turn off this option. | |
495 | ||
9ee44efb PP |
496 | 9. Exim can now be started with -bw (with an optional timeout, given as |
497 | -bw<timespec>). With this, stdin at startup is a socket that is | |
498 | already listening for connections. This has a more modern name of | |
499 | "socket activation", but forcing the activated socket to fd 0. We're | |
500 | interested in adding more support for modern variants. | |
501 | ||
eae0036b | 502 | 10. ${eval } now uses 64-bit values on supporting platforms. A new "G" suffix |
97d17305 JH |
503 | for numbers indicates multiplication by 1024^3. |
504 | ||
17c76198 PP |
505 | 11. The GnuTLS support has been revamped; the three options gnutls_require_kx, |
506 | gnutls_require_mac & gnutls_require_protocols are no longer supported. | |
507 | tls_require_ciphers is now parsed by gnutls_priority_init(3) as a priority | |
508 | string, documentation for which is at: | |
42bfef1e | 509 | http://www.gnutls.org/manual/html_node/Priority-Strings.html |
17c76198 PP |
510 | |
511 | SNI support has been added to Exim's GnuTLS integration too. | |
512 | ||
af3498d6 PP |
513 | For sufficiently recent GnuTLS libraries, ${randint:..} will now use |
514 | gnutls_rnd(), asking for GNUTLS_RND_NONCE level randomness. | |
515 | ||
53947857 | 516 | 12. With OpenSSL, if built with EXPERIMENTAL_OCSP, a new option tls_ocsp_file |
3f7eeb86 PP |
517 | is now available. If the contents of the file are valid, then Exim will |
518 | send that back in response to a TLS status request; this is OCSP Stapling. | |
519 | Exim will not maintain the contents of the file in any way: administrators | |
520 | are responsible for ensuring that it is up-to-date. | |
521 | ||
522 | See "experimental-spec.txt" for more details. | |
523 | ||
eae0036b PP |
524 | 13. ${lookup dnsdb{ }} supports now SPF record types. They are handled |
525 | identically to TXT record lookups. | |
526 | ||
2605c55b | 527 | 14. New expansion variable $tod_epoch_l for higher-precision time. |
c1e794ba | 528 | |
3375e053 PP |
529 | 15. New global option tls_dh_max_bits, defaulting to current value of NSS |
530 | hard-coded limit of DH ephemeral bits, to fix interop problems caused by | |
531 | GnuTLS 2.12 library recommending a bit count higher than NSS supports. | |
532 | ||
a799883d PP |
533 | 16. tls_dhparam now used by both OpenSSL and GnuTLS, can be path or identifier. |
534 | Option can now be a path or an identifier for a standard prime. | |
535 | If unset, we use the DH prime from section 2.2 of RFC 5114, "ike23". | |
536 | Set to "historic" to get the old GnuTLS behaviour of auto-generated DH | |
537 | primes. | |
538 | ||
3ecab157 | 539 | 17. SSLv2 now disabled by default in OpenSSL. (Never supported by GnuTLS). |
f0f5a555 PP |
540 | Use "openssl_options -no_sslv2" to re-enable support, if your OpenSSL |
541 | install was not built with OPENSSL_NO_SSL2 ("no-ssl2"). | |
542 | ||
9e45c72b | 543 | |
3ce96ada TF |
544 | Version 4.77 |
545 | ------------ | |
546 | ||
547 | 1. New options for the ratelimit ACL condition: /count= and /unique=. | |
548 | The /noupdate option has been replaced by a /readonly option. | |
549 | ||
061b7ebd PP |
550 | 2. The SMTP transport's protocol option may now be set to "smtps", to |
551 | use SSL-on-connect outbound. | |
552 | ||
9e949f00 PP |
553 | 3. New variable $av_failed, set true if the AV scanner deferred; ie, when |
554 | there is a problem talking to the AV scanner, or the AV scanner running. | |
555 | ||
39257585 PP |
556 | 4. New expansion conditions, "inlist" and "inlisti", which take simple lists |
557 | and check if the search item is a member of the list. This does not | |
558 | support named lists, but does subject the list part to string expansion. | |
559 | ||
560 | 5. Unless the new EXPAND_LISTMATCH_RHS build option is set when Exim was | |
561 | built, Exim no longer performs string expansion on the second string of | |
562 | the match_* expansion conditions: "match_address", "match_domain", | |
563 | "match_ip" & "match_local_part". Named lists can still be used. | |
564 | ||
7c6d71af | 565 | |
e97d1f08 PP |
566 | Version 4.76 |
567 | ------------ | |
568 | ||
569 | 1. The global option "dns_use_edns0" may be set to coerce EDNS0 usage on | |
570 | or off in the resolver library. | |
571 | ||
572 | ||
bc19a55b PP |
573 | Version 4.75 |
574 | ------------ | |
575 | ||
576 | 1. In addition to the existing LDAP and LDAP/SSL ("ldaps") support, there | |
577 | is now LDAP/TLS support, given sufficiently modern OpenLDAP client | |
578 | libraries. The following global options have been added in support of | |
579 | this: ldap_ca_cert_dir, ldap_ca_cert_file, ldap_cert_file, ldap_cert_key, | |
580 | ldap_cipher_suite, ldap_require_cert, ldap_start_tls. | |
581 | ||
2fe76745 PP |
582 | 2. The pipe transport now takes a boolean option, "freeze_signal", default |
583 | false. When true, if the external delivery command exits on a signal then | |
584 | Exim will freeze the message in the queue, instead of generating a bounce. | |
585 | ||
f1e5fef5 PP |
586 | 3. Log filenames may now use %M as an escape, instead of %D (still available). |
587 | The %M pattern expands to yyyymm, providing month-level resolution. | |
588 | ||
332f5cf3 PP |
589 | 4. The $message_linecount variable is now updated for the maildir_tag option, |
590 | in the same way as $message_size, to reflect the real number of lines, | |
591 | including any header additions or removals from transport. | |
592 | ||
29cfeb94 PP |
593 | 5. When contacting a pool of SpamAssassin servers configured in spamd_address, |
594 | Exim now selects entries randomly, to better scale in a cluster setup. | |
595 | ||
bc19a55b | 596 | |
a01ba081 PP |
597 | Version 4.74 |
598 | ------------ | |
599 | ||
1670ef10 PP |
600 | 1. SECURITY FIX: privilege escalation flaw fixed. On Linux (and only Linux) |
601 | the flaw permitted the Exim run-time user to cause root to append to | |
602 | arbitrary files of the attacker's choosing, with the content based | |
603 | on content supplied by the attacker. | |
604 | ||
605 | 2. Exim now supports loading some lookup types at run-time, using your | |
a01ba081 PP |
606 | platform's dlopen() functionality. This has limited platform support |
607 | and the intention is not to support every variant, it's limited to | |
608 | dlopen(). This permits the main Exim binary to not be linked against | |
609 | all the libraries needed for all the lookup types. | |
610 | ||
611 | ||
77bb000f PP |
612 | Version 4.73 |
613 | ------------ | |
614 | ||
2cfd3221 PP |
615 | NOTE: this version is not guaranteed backwards-compatible, please read the |
616 | items below carefully | |
617 | ||
77bb000f PP |
618 | 1. A new main configuration option, "openssl_options", is available if Exim |
619 | is built with SSL support provided by OpenSSL. The option allows | |
620 | administrators to specify OpenSSL options to be used on connections; | |
621 | typically this is to set bug compatibility features which the OpenSSL | |
622 | developers have not enabled by default. There may be security | |
623 | consequences for certain options, so these should not be changed | |
624 | frivolously. | |
625 | ||
a29e5231 PP |
626 | 2. A new pipe transport option, "permit_coredumps", may help with problem |
627 | diagnosis in some scenarios. Note that Exim is typically installed as | |
628 | a setuid binary, which on most OSes will inhibit coredumps by default, | |
43236f35 | 629 | so that safety mechanism would have to be overridden for this option to |
a29e5231 PP |
630 | be able to take effect. |
631 | ||
8544e77a PP |
632 | 3. ClamAV 0.95 is now required for ClamAV support in Exim, unless |
633 | Local/Makefile sets: WITH_OLD_CLAMAV_STREAM=yes | |
634 | Note that this switches Exim to use a new API ("INSTREAM") and a future | |
635 | release of ClamAV will remove support for the old API ("STREAM"). | |
636 | ||
637 | The av_scanner option, when set to "clamd", now takes an optional third | |
638 | part, "local", which causes Exim to pass a filename to ClamAV instead of | |
639 | the file content. This is the same behaviour as when clamd is pointed at | |
640 | a Unix-domain socket. For example: | |
641 | ||
642 | av_scanner = clamd:192.0.2.3 1234:local | |
643 | ||
491fab4c PP |
644 | ClamAV's ExtendedDetectionInfo response format is now handled. |
645 | ||
8544e77a PP |
646 | 4. There is now a -bmalware option, restricted to admin users. This option |
647 | takes one parameter, a filename, and scans that file with Exim's | |
648 | malware-scanning framework. This is intended purely as a debugging aid | |
649 | to ensure that Exim's scanning is working, not to replace other tools. | |
a9622bc6 PP |
650 | Note that the ACL framework is not invoked, so if av_scanner references |
651 | ACL variables without a fallback then this will fail. | |
8544e77a | 652 | |
83e029d5 PP |
653 | 5. There is a new expansion operator, "reverse_ip", which will reverse IP |
654 | addresses; IPv4 into dotted quad, IPv6 into dotted nibble. Examples: | |
655 | ||
656 | ${reverse_ip:192.0.2.4} | |
657 | -> 4.2.0.192 | |
658 | ${reverse_ip:2001:0db8:c42:9:1:abcd:192.0.2.3} | |
659 | -> 3.0.2.0.0.0.0.c.d.c.b.a.1.0.0.0.9.0.0.0.2.4.c.0.8.b.d.0.1.0.0.2 | |
660 | ||
ed7f7860 PP |
661 | 6. There is a new ACL control called "debug", to enable debug logging. |
662 | This allows selective logging of certain incoming transactions within | |
663 | production environments, with some care. It takes two options, "tag" | |
664 | and "opts"; "tag" is included in the filename of the log and "opts" | |
665 | is used as per the -d<options> command-line option. Examples, which | |
666 | don't all make sense in all contexts: | |
667 | ||
668 | control = debug | |
669 | control = debug/tag=.$sender_host_address | |
670 | control = debug/opts=+expand+acl | |
671 | control = debug/tag=.$message_exim_id/opts=+expand | |
672 | ||
10385c15 PP |
673 | 7. It has always been implicit in the design and the documentation that |
674 | "the Exim user" is not root. src/EDITME said that using root was | |
675 | "very strongly discouraged". This is not enough to keep people from | |
676 | shooting themselves in the foot in days when many don't configure Exim | |
677 | themselves but via package build managers. The security consequences of | |
678 | running various bits of network code are severe if there should be bugs in | |
679 | them. As such, the Exim user may no longer be root. If configured | |
680 | statically, Exim will refuse to build. If configured as ref:user then Exim | |
681 | will exit shortly after start-up. If you must shoot yourself in the foot, | |
682 | then henceforth you will have to maintain your own local patches to strip | |
683 | the safeties off. | |
684 | ||
06a6f4ed | 685 | 8. There is a new expansion condition, bool_lax{}. Where bool{} uses the ACL |
6a8de854 PP |
686 | condition logic to determine truth/failure and will fail to expand many |
687 | strings, bool_lax{} uses the router condition logic, where most strings | |
688 | do evaluate true. | |
689 | Note: bool{00} is false, bool_lax{00} is true. | |
690 | ||
06a6f4ed | 691 | 9. Routers now support multiple "condition" tests. |
532be449 | 692 | |
5dc43717 JJ |
693 | 10. There is now a runtime configuration option "tcp_wrappers_daemon_name". |
694 | Setting this allows an admin to define which entry in the tcpwrappers | |
695 | config file will be used to control access to the daemon. This option | |
696 | is only available when Exim is built with USE_TCP_WRAPPERS. The | |
697 | default value is set at build time using the TCP_WRAPPERS_DAEMON_NAME | |
698 | build option. | |
699 | ||
79d4bc3d PP |
700 | 11. [POSSIBLE CONFIG BREAKAGE] The default value for system_filter_user is now |
701 | the Exim run-time user, instead of root. | |
702 | ||
2cfd3221 PP |
703 | 12. [POSSIBLE CONFIG BREAKAGE] ALT_CONFIG_ROOT_ONLY is no longer optional and |
704 | is forced on. This is mitigated by the new build option | |
90b6341f | 705 | TRUSTED_CONFIG_LIST which defines a list of configuration files which |
7f7f0545 DW |
706 | are trusted; one per line. If a config file is owned by root and matches |
707 | a pathname in the list, then it may be invoked by the Exim build-time | |
708 | user without Exim relinquishing root privileges. | |
2cfd3221 PP |
709 | |
710 | 13. [POSSIBLE CONFIG BREAKAGE] The Exim user is no longer automatically | |
711 | trusted to supply -D<Macro[=Value]> overrides on the command-line. Going | |
90b6341f DW |
712 | forward, we recommend using TRUSTED_CONFIG_LIST with shim configs that |
713 | include the main config. As a transition mechanism, we are temporarily | |
714 | providing a work-around: the new build option WHITELIST_D_MACROS provides | |
43236f35 | 715 | a colon-separated list of macro names which may be overridden by the Exim |
90b6341f DW |
716 | run-time user. The values of these macros are constrained to the regex |
717 | ^[A-Za-z0-9_/.-]*$ (which explicitly does allow for empty values). | |
2cfd3221 | 718 | |
77bb000f | 719 | |
3fc596e4 NM |
720 | Version 4.72 |
721 | ------------ | |
722 | ||
b26eacf1 PP |
723 | 1. TWO SECURITY FIXES: one relating to mail-spools which are globally |
724 | writable, the other to locking of MBX folders (not mbox). | |
725 | ||
726 | 2. MySQL stored procedures are now supported. | |
727 | ||
728 | 3. The dkim_domain transport option is now a list, not a single string, and | |
729 | messages will be signed for each element in the list (discarding | |
730 | duplicates). | |
731 | ||
732 | 4. The 4.70 release unexpectedly changed the behaviour of dnsdb TXT lookups | |
733 | in the presence of multiple character strings within the RR. Prior to 4.70, | |
734 | only the first string would be returned. The dnsdb lookup now, by default, | |
735 | preserves the pre-4.70 semantics, but also now takes an extended output | |
8f425947 PP |
736 | separator specification. The separator can be followed by a semicolon, to |
737 | concatenate the individual text strings together with no join character, | |
738 | or by a comma and a second separator character, in which case the text | |
739 | strings within a TXT record are joined on that second character. | |
740 | Administrators are reminded that DNS provides no ordering guarantees | |
741 | between multiple records in an RRset. For example: | |
b26eacf1 PP |
742 | |
743 | foo.example. IN TXT "a" "b" "c" | |
744 | foo.example. IN TXT "d" "e" "f" | |
745 | ||
746 | ${lookup dnsdb{>/ txt=foo.example}} -> "a/d" | |
747 | ${lookup dnsdb{>/; txt=foo.example}} -> "def/abc" | |
8f425947 | 748 | ${lookup dnsdb{>/,+ txt=foo.example}} -> "a+b+c/d+e+f" |
b26eacf1 | 749 | |
3fc596e4 | 750 | |
f33253cc NM |
751 | Version 4.70 / 4.71 |
752 | ------------------- | |
65a7d8c3 | 753 | |
7c6d71af | 754 | 1. Native DKIM support without an external library. |
a8c8d6b5 JJ |
755 | (Note that if no action to prevent it is taken, a straight upgrade will |
756 | result in DKIM verification of all signed incoming emails. See spec | |
757 | for details on conditionally disabling) | |
7c6d71af NM |
758 | |
759 | 2. Experimental DCC support via dccifd (contributed by Wolfgang Breyha). | |
65a7d8c3 | 760 | |
f33253cc | 761 | 3. There is now a bool{} expansion condition which maps certain strings to |
7d9f747b | 762 | true/false condition values (most likely of use in conjunction with the |
f33253cc NM |
763 | and{} expansion operator). |
764 | ||
765 | 4. The $spam_score, $spam_bar and $spam_report variables are now available | |
766 | at delivery time. | |
767 | ||
768 | 5. exim -bP now supports "macros", "macro_list" or "macro MACRO_NAME" as | |
769 | options, provided that Exim is invoked by an admin_user. | |
770 | ||
771 | 6. There is a new option gnutls_compat_mode, when linked against GnuTLS, | |
772 | which increases compatibility with older clients at the cost of decreased | |
773 | security. Don't set this unless you need to support such clients. | |
774 | ||
775 | 7. There is a new expansion operator, ${randint:...} which will produce a | |
776 | "random" number less than the supplied integer. This randomness is | |
777 | not guaranteed to be cryptographically strong, but depending upon how | |
778 | Exim was built may be better than the most naive schemes. | |
779 | ||
780 | 8. Exim now explicitly ensures that SHA256 is available when linked against | |
781 | OpenSSL. | |
782 | ||
783 | 9. The transport_filter_timeout option now applies to SMTP transports too. | |
784 | ||
65a7d8c3 | 785 | |
7d9f747b PP |
786 | Version 4.69 |
787 | ------------ | |
788 | ||
789 | 1. Preliminary DKIM support in Experimental. | |
790 | ||
791 | ||
2b85bce7 PH |
792 | Version 4.68 |
793 | ------------ | |
794 | ||
795 | 1. The body_linecount and body_zerocount C variables are now exported in the | |
796 | local_scan API. | |
797 | ||
93655c46 PH |
798 | 2. When a dnslists lookup succeeds, the key that was looked up is now placed |
799 | in $dnslist_matched. When the key is an IP address, it is not reversed in | |
800 | this variable (though it is, of course, in the actual lookup). In simple | |
801 | cases, for example: | |
802 | ||
803 | deny dnslists = spamhaus.example | |
804 | ||
805 | the key is also available in another variable (in this case, | |
806 | $sender_host_address). In more complicated cases, however, this is not | |
807 | true. For example, using a data lookup might generate a dnslists lookup | |
808 | like this: | |
809 | ||
810 | deny dnslists = spamhaus.example/<|192.168.1.2|192.168.6.7|... | |
811 | ||
812 | If this condition succeeds, the value in $dnslist_matched might be | |
813 | 192.168.6.7 (for example). | |
814 | ||
6c512171 PH |
815 | 3. Authenticators now have a client_condition option. When Exim is running as |
816 | a client, it skips an authenticator whose client_condition expansion yields | |
817 | "0", "no", or "false". This can be used, for example, to skip plain text | |
818 | authenticators when the connection is not encrypted by a setting such as: | |
819 | ||
820 | client_condition = ${if !eq{$tls_cipher}{}} | |
821 | ||
822 | Note that the 4.67 documentation states that $tls_cipher contains the | |
823 | cipher used for incoming messages. In fact, during SMTP delivery, it | |
824 | contains the cipher used for the delivery. The same is true for | |
825 | $tls_peerdn. | |
826 | ||
a96603a0 PH |
827 | 4. There is now a -Mvc <message-id> option, which outputs a copy of the |
828 | message to the standard output, in RFC 2822 format. The option can be used | |
829 | only by an admin user. | |
830 | ||
8f240103 PH |
831 | 5. There is now a /noupdate option for the ratelimit ACL condition. It |
832 | computes the rate and checks the limit as normal, but it does not update | |
833 | the saved data. This means that, in relevant ACLs, it is possible to lookup | |
834 | the existence of a specified (or auto-generated) ratelimit key without | |
835 | incrementing the ratelimit counter for that key. | |
836 | ||
837 | In order for this to be useful, another ACL entry must set the rate | |
838 | for the same key somewhere (otherwise it will always be zero). | |
839 | ||
840 | Example: | |
841 | ||
842 | acl_check_connect: | |
843 | # Read the rate; if it doesn't exist or is below the maximum | |
844 | # we update it below | |
845 | deny ratelimit = 100 / 5m / strict / noupdate | |
846 | log_message = RATE: $sender_rate / $sender_rate_period \ | |
847 | (max $sender_rate_limit) | |
848 | ||
849 | [... some other logic and tests...] | |
850 | ||
851 | warn ratelimit = 100 / 5m / strict / per_cmd | |
852 | log_message = RATE UPDATE: $sender_rate / $sender_rate_period \ | |
853 | (max $sender_rate_limit) | |
854 | condition = ${if le{$sender_rate}{$sender_rate_limit}} | |
855 | ||
856 | accept | |
857 | ||
d677b2f2 PH |
858 | 6. The variable $max_received_linelength contains the number of bytes in the |
859 | longest line that was received as part of the message, not counting the | |
860 | line termination character(s). | |
861 | ||
d52120f2 PH |
862 | 7. Host lists can now include +ignore_defer and +include_defer, analagous to |
863 | +ignore_unknown and +include_unknown. These options should be used with | |
864 | care, probably only in non-critical host lists such as whitelists. | |
865 | ||
8669f003 PH |
866 | 8. There's a new option called queue_only_load_latch, which defaults true. |
867 | If set false when queue_only_load is greater than zero, Exim re-evaluates | |
868 | the load for each incoming message in an SMTP session. Otherwise, once one | |
869 | message is queued, the remainder are also. | |
870 | ||
4f054c63 | 871 | 9. There is a new ACL, specified by acl_smtp_notquit, which is run in most |
8f128379 PH |
872 | cases when an SMTP session ends without sending QUIT. However, when Exim |
873 | itself is is bad trouble, such as being unable to write to its log files, | |
874 | this ACL is not run, because it might try to do things (such as write to | |
875 | log files) that make the situation even worse. | |
876 | ||
877 | Like the QUIT ACL, this new ACL is provided to make it possible to gather | |
878 | statistics. Whatever it returns (accept or deny) is immaterial. The "delay" | |
879 | modifier is forbidden in this ACL. | |
880 | ||
881 | When the NOTQUIT ACL is running, the variable $smtp_notquit_reason is set | |
882 | to a string that indicates the reason for the termination of the SMTP | |
883 | connection. The possible values are: | |
884 | ||
885 | acl-drop Another ACL issued a "drop" command | |
886 | bad-commands Too many unknown or non-mail commands | |
887 | command-timeout Timeout while reading SMTP commands | |
888 | connection-lost The SMTP connection has been lost | |
889 | data-timeout Timeout while reading message data | |
890 | local-scan-error The local_scan() function crashed | |
891 | local-scan-timeout The local_scan() function timed out | |
892 | signal-exit SIGTERM or SIGINT | |
893 | synchronization-error SMTP synchronization error | |
894 | tls-failed TLS failed to start | |
895 | ||
896 | In most cases when an SMTP connection is closed without having received | |
897 | QUIT, Exim sends an SMTP response message before actually closing the | |
898 | connection. With the exception of acl-drop, the default message can be | |
899 | overridden by the "message" modifier in the NOTQUIT ACL. In the case of a | |
900 | "drop" verb in another ACL, it is the message from the other ACL that is | |
901 | used. | |
902 | ||
b7670459 PH |
903 | 10. For MySQL and PostgreSQL lookups, it is now possible to specify a list of |
904 | servers with individual queries. This is done by starting the query with | |
905 | "servers=x:y:z;", where each item in the list may take one of two forms: | |
906 | ||
907 | (1) If it is just a host name, the appropriate global option (mysql_servers | |
908 | or pgsql_servers) is searched for a host of the same name, and the | |
909 | remaining parameters (database, user, password) are taken from there. | |
910 | ||
911 | (2) If it contains any slashes, it is taken as a complete parameter set. | |
912 | ||
913 | The list of servers is used in exactly the same was as the global list. | |
914 | Once a connection to a server has happened and a query has been | |
915 | successfully executed, processing of the lookup ceases. | |
916 | ||
917 | This feature is intended for use in master/slave situations where updates | |
918 | are occurring, and one wants to update a master rather than a slave. If the | |
919 | masters are in the list for reading, you might have: | |
920 | ||
921 | mysql_servers = slave1/db/name/pw:slave2/db/name/pw:master/db/name/pw | |
922 | ||
923 | In an updating lookup, you could then write | |
924 | ||
925 | ${lookup mysql{servers=master; UPDATE ...} | |
926 | ||
927 | If, on the other hand, the master is not to be used for reading lookups: | |
928 | ||
929 | pgsql_servers = slave1/db/name/pw:slave2/db/name/pw | |
930 | ||
931 | you can still update the master by | |
932 | ||
933 | ${lookup pgsql{servers=master/db/name/pw; UPDATE ...} | |
934 | ||
ddea74fa PH |
935 | 11. The message_body_newlines option (default FALSE, for backwards |
936 | compatibility) can be used to control whether newlines are present in | |
937 | $message_body and $message_body_end. If it is FALSE, they are replaced by | |
938 | spaces. | |
939 | ||
2b85bce7 | 940 | |
b4ed4da0 PH |
941 | Version 4.67 |
942 | ------------ | |
943 | ||
944 | 1. There is a new log selector called smtp_no_mail, which is not included in | |
945 | the default setting. When it is set, a line is written to the main log | |
946 | whenever an accepted SMTP connection terminates without having issued a | |
4aa45c31 | 947 | MAIL command. |
b4ed4da0 | 948 | |
431b7361 | 949 | 2. When an item in a dnslists list is followed by = and & and a list of IP |
4aa45c31 PH |
950 | addresses, the behaviour was not clear when the lookup returned more than |
951 | one IP address. This has been solved by the addition of == and =& for "all" | |
93655c46 | 952 | rather than the default "any" matching. |
431b7361 | 953 | |
4aa45c31 PH |
954 | 3. Up till now, the only control over which cipher suites GnuTLS uses has been |
955 | for the cipher algorithms. New options have been added to allow some of the | |
956 | other parameters to be varied. | |
431b7361 | 957 | |
4aa45c31 PH |
958 | 4. There is a new compile-time option called ENABLE_DISABLE_FSYNC. When it is |
959 | set, Exim compiles a runtime option called disable_fsync. | |
431b7361 | 960 | |
4aa45c31 | 961 | 5. There is a new variable called $smtp_count_at_connection_start. |
431b7361 | 962 | |
4aa45c31 | 963 | 6. There's a new control called no_pipelining. |
cf8b11a5 | 964 | |
41c7c167 | 965 | 7. There are two new variables called $sending_ip_address and $sending_port. |
4aa45c31 | 966 | These are set whenever an SMTP connection to another host has been set up. |
41c7c167 PH |
967 | |
968 | 8. The expansion of the helo_data option in the smtp transport now happens | |
4aa45c31 | 969 | after the connection to the server has been made. |
41c7c167 | 970 | |
9c57cbc0 | 971 | 9. There is a new expansion operator ${rfc2047d: that decodes strings that |
4aa45c31 | 972 | are encoded as per RFC 2047. |
9c57cbc0 | 973 | |
f3f065bb PH |
974 | 10. There is a new log selector called "pid", which causes the current process |
975 | id to be added to every log line, in square brackets, immediately after the | |
976 | time and date. | |
977 | ||
047bdd8c | 978 | 11. Exim has been modified so that it flushes SMTP output before implementing |
4c590bd1 PH |
979 | a delay in an ACL. It also flushes the output before performing a callout, |
980 | as this can take a substantial time. These behaviours can be disabled by | |
981 | obeying control = no_delay_flush or control = no_callout_flush, | |
4aa45c31 | 982 | respectively, at some earlier stage of the connection. |
047bdd8c | 983 | |
0ce9abe6 | 984 | 12. There are two new expansion conditions that iterate over a list. They are |
4aa45c31 | 985 | called forany and forall. |
0ce9abe6 | 986 | |
0e22dfd1 PH |
987 | 13. There's a new global option called dsn_from that can be used to vary the |
988 | contents of From: lines in bounces and other automatically generated | |
989 | messages ("delivery status notifications" - hence the name of the option). | |
0e22dfd1 | 990 | |
4aa45c31 | 991 | 14. The smtp transport has a new option called hosts_avoid_pipelining. |
c51b8e75 | 992 | |
75b1493f | 993 | 15. By default, exigrep does case-insensitive matches. There is now a -I option |
4aa45c31 | 994 | that makes it case-sensitive. |
29f89cad | 995 | |
4aa45c31 PH |
996 | 16. A number of new features ("addresses", "map", "filter", and "reduce") have |
997 | been added to string expansions to make it easier to process lists of | |
998 | items, typically addresses. | |
29f89cad | 999 | |
c3611384 PH |
1000 | 17. There's a new ACL modifier called "continue". It does nothing of itself, |
1001 | and processing of the ACL always continues with the next condition or | |
1002 | modifier. It is provided so that the side effects of expanding its argument | |
4aa45c31 | 1003 | can be used. |
c3611384 | 1004 | |
ec95d1a6 | 1005 | 18. It is now possible to use newline and other control characters (those with |
4aa45c31 | 1006 | values less than 32, plus DEL) as separators in lists. |
ec95d1a6 | 1007 | |
b2d5182b PH |
1008 | 19. The exigrep utility now has a -v option, which inverts the matching |
1009 | condition. | |
1010 | ||
c456d9bb | 1011 | 20. The host_find_failed option in the manualroute router can now be set to |
4aa45c31 | 1012 | "ignore". |
c456d9bb | 1013 | |
b4ed4da0 PH |
1014 | |
1015 | Version 4.66 | |
1016 | ------------ | |
1017 | ||
1018 | No new features were added to 4.66. | |
1019 | ||
1020 | ||
1021 | Version 4.65 | |
1022 | ------------ | |
1023 | ||
1024 | No new features were added to 4.65. | |
1025 | ||
38a0a95f PH |
1026 | |
1027 | Version 4.64 | |
1028 | ------------ | |
1029 | ||
af561417 PH |
1030 | 1. ACL variables can now be given arbitrary names, as long as they start with |
1031 | "acl_c" or "acl_m" (for connection variables and message variables), are at | |
1032 | least six characters long, with the sixth character being either a digit or | |
883335dc | 1033 | an underscore. |
af561417 PH |
1034 | |
1035 | 2. There is a new ACL modifier called log_reject_target. It makes it possible | |
883335dc | 1036 | to specify which logs are used for messages about ACL rejections. |
af561417 PH |
1037 | |
1038 | 3. There is a new authenticator called "dovecot". This is an interface to the | |
1039 | authentication facility of the Dovecot POP/IMAP server, which can support a | |
883335dc | 1040 | number of authentication methods. |
af561417 PH |
1041 | |
1042 | 4. The variable $message_headers_raw provides a concatenation of all the | |
1043 | messages's headers without any decoding. This is in contrast to | |
1044 | $message_headers, which does RFC2047 decoding on the header contents. | |
1045 | ||
883335dc PH |
1046 | 5. In a DNS black list, if two domain names, comma-separated, are given, the |
1047 | second is used first to do an initial check, making use of any IP value | |
1048 | restrictions that are set. If there is a match, the first domain is used, | |
1049 | without any IP value restrictions, to get the TXT record. | |
af561417 | 1050 | |
883335dc | 1051 | 6. All authenticators now have a server_condition option. |
af561417 PH |
1052 | |
1053 | 7. There is a new command-line option called -Mset. It is useful only in | |
1054 | conjunction with -be (that is, when testing string expansions). It must be | |
1055 | followed by a message id; Exim loads the given message from its spool | |
883335dc | 1056 | before doing the expansions. |
af561417 PH |
1057 | |
1058 | 8. Another similar new command-line option is called -bem. It operates like | |
883335dc PH |
1059 | -be except that it must be followed by the name of a file that contains a |
1060 | message. | |
af561417 PH |
1061 | |
1062 | 9. When an address is delayed because of a 4xx response to a RCPT command, it | |
1063 | is now the combination of sender and recipient that is delayed in | |
883335dc | 1064 | subsequent queue runs until its retry time is reached. |
af561417 PH |
1065 | |
1066 | 10. Unary negation and the bitwise logical operators and, or, xor, not, and | |
883335dc | 1067 | shift, have been added to the eval: and eval10: expansion items. |
48c7f9e2 | 1068 | |
194cc0e4 PH |
1069 | 11. The variables $interface_address and $interface_port have been renamed |
1070 | as $received_ip_address and $received_port, to make it clear that they | |
1071 | relate to message reception rather than delivery. (The old names remain | |
1072 | available for compatibility.) | |
1073 | ||
883335dc PH |
1074 | 12. The "message" modifier can now be used on "accept" and "discard" acl verbs |
1075 | to vary the message that is sent when an SMTP command is accepted. | |
4e88a19f | 1076 | |
495ae4b0 | 1077 | |
4608d683 PH |
1078 | Version 4.63 |
1079 | ------------ | |
1080 | ||
1081 | 1. There is a new Boolean option called filter_prepend_home for the redirect | |
38a0a95f | 1082 | router. |
4608d683 | 1083 | |
45b91596 PH |
1084 | 2. There is a new acl, set by acl_not_smtp_start, which is run right at the |
1085 | start of receiving a non-SMTP message, before any of the message has been | |
38a0a95f | 1086 | read. |
45b91596 | 1087 | |
a5bd321b PH |
1088 | 3. When an SMTP error message is specified in a "message" modifier in an ACL, |
1089 | or in a :fail: or :defer: message in a redirect router, Exim now checks the | |
38a0a95f | 1090 | start of the message for an SMTP error code. |
a5bd321b | 1091 | |
6ec97b1b | 1092 | 4. There is a new parameter for LDAP lookups called "referrals", which takes |
38a0a95f | 1093 | one of the settings "follow" (the default) or "nofollow". |
6ec97b1b | 1094 | |
e22ca4ac JJ |
1095 | 5. Version 20070721.2 of exipick now included, offering these new options: |
1096 | --reverse | |
1097 | After all other sorting options have bee processed, reverse order | |
1098 | before displaying messages (-R is synonym). | |
1099 | --random | |
1100 | Randomize order of matching messages before displaying. | |
1101 | --size | |
1102 | Instead of displaying the matching messages, display the sum | |
1103 | of their sizes. | |
1104 | --sort <variable>[,<variable>...] | |
1105 | Before displaying matching messages, sort the messages according to | |
1106 | each messages value for each variable. | |
1107 | --not | |
1108 | Negate the value for every test (returns inverse output from the | |
1109 | same criteria without --not). | |
1110 | ||
4608d683 | 1111 | |
1cce3af8 PH |
1112 | Version 4.62 |
1113 | ------------ | |
1114 | ||
1115 | 1. The ${readsocket expansion item now supports Internet domain sockets as well | |
1116 | as Unix domain sockets. If the first argument begins "inet:", it must be of | |
1117 | the form "inet:host:port". The port is mandatory; it may be a number or the | |
1118 | name of a TCP port in /etc/services. The host may be a name, or it may be an | |
1119 | IP address. An ip address may optionally be enclosed in square brackets. | |
1120 | This is best for IPv6 addresses. For example: | |
1121 | ||
1122 | ${readsocket{inet:[::1]:1234}{<request data>}... | |
1123 | ||
1124 | Only a single host name may be given, but if looking it up yield more than | |
1125 | one IP address, they are each tried in turn until a connection is made. Once | |
1126 | a connection has been made, the behaviour is as for ${readsocket with a Unix | |
1127 | domain socket. | |
1128 | ||
f7fd3850 PH |
1129 | 2. If a redirect router sets up file or pipe deliveries for more than one |
1130 | incoming address, and the relevant transport has batch_max set greater than | |
1131 | one, a batch delivery now occurs. | |
1132 | ||
d6629cdc PH |
1133 | 3. The appendfile transport has a new option called maildirfolder_create_regex. |
1134 | Its value is a regular expression. For a maildir delivery, this is matched | |
1135 | against the maildir directory; if it matches, Exim ensures that a | |
1136 | maildirfolder file is created alongside the new, cur, and tmp directories. | |
1137 | ||
1cce3af8 | 1138 | |
7e66e54d PH |
1139 | Version 4.61 |
1140 | ------------ | |
1141 | ||
4f578862 PH |
1142 | The documentation is up-to-date for the 4.61 release. Major new features since |
1143 | the 4.60 release are: | |
1144 | ||
1145 | . An option called disable_ipv6, to disable the use of IPv6 completely. | |
1146 | ||
1147 | . An increase in the number of ACL variables to 20 of each type. | |
1148 | ||
1149 | . A change to use $auth1, $auth2, and $auth3 in authenticators instead of $1, | |
1150 | $2, $3, (though those are still set) because the numeric variables get used | |
1151 | for other things in complicated expansions. | |
1152 | ||
843a41e8 | 1153 | . The default for rfc1413_query_timeout has been changed from 30s to 5s. |
4f578862 PH |
1154 | |
1155 | . It is possible to use setclassresources() on some BSD OS to control the | |
1156 | resources used in pipe deliveries. | |
1157 | ||
1158 | . A new ACL modifier called add_header, which can be used with any verb. | |
1159 | ||
1160 | . More errors are detectable in retry rules. | |
1161 | ||
1162 | There are a number of other additions too. | |
71fafd95 | 1163 | |
7e66e54d | 1164 | |
425ae40f | 1165 | Version 4.60 |
b5aea5e1 PH |
1166 | ------------ |
1167 | ||
425ae40f PH |
1168 | The documentation is up-to-date for the 4.60 release. Major new features since |
1169 | the 4.50 release are: | |
1a46a8c5 | 1170 | |
425ae40f | 1171 | . Support for SQLite. |
1a46a8c5 | 1172 | |
425ae40f | 1173 | . Support for IGNOREQUOTA in LMTP. |
1a46a8c5 | 1174 | |
425ae40f | 1175 | . Extensions to the "submission mode" features. |
1a46a8c5 | 1176 | |
425ae40f | 1177 | . Support for Client SMTP Authorization (CSA). |
1a46a8c5 | 1178 | |
425ae40f | 1179 | . Support for ratelimiting hosts and users. |
b5aea5e1 | 1180 | |
425ae40f | 1181 | . New expansion items to help with the BATV "prvs" scheme. |
b5aea5e1 | 1182 | |
425ae40f | 1183 | . A "match_ip" condition, that matches an IP address against a list. |
35edf2ff | 1184 | |
425ae40f | 1185 | There are many more minor changes. |
495ae4b0 PH |
1186 | |
1187 | **** |