dsearch: full-path return option
[exim.git] / doc / doc-txt / NewStuff
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1New Features in Exim
2--------------------
3
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4This file contains descriptions of new features that have been added to Exim.
5Before a formal release, there may be quite a lot of detail so that people can
33f316f2 6test from the snapshots or the Git before the documentation is updated. Once
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7the documentation is updated, this file is reduced to a short list.
8
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9Version 4.94
10------------
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11
12 1. EXPERIMENTAL_SRS_NATIVE optional build feature. See the experimental.spec
13 file.
14
1d717e1c 15 2. Channel-binding for authenticators is now supported under OpenSSL.
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16 Previously it was GnuTLS-only.
17
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18 3. A msg:defer event.
19
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20 4. Client-side support in the gsasl authenticator. Tested against the
21 plaintext driver for PLAIN; only against itself for SCRAM-SHA-1 and
22 SCRAM-SHA-1-PLUS methods.
14a806d6 23
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24 5. Server-side support in the gsasl authenticator for encrypted passwords, as
25 an alternate for the existing plaintext.
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26
27 6. Variable $local_part_verified, set by the router check_local_part condition
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28 with untainted data.
29
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30 7. Named-list definitions can now be prefixed "hide" so that "-bP" commands do
31 not output the content. Previously this could only be done on options.
32
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33 8. As an exerimental feature, the dovecot authenticatino driver supports inet
34 sockets. Previously it was unix-domain sockets only.
35
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36 9. The ACL control "queue_only" can also be spelled "queue", and now takes an
37 option "first_pass_route" to do the same as a "-odqs" on the command line.
04403ab0 38
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39 9. Items specified for the router and transport headers_remove option can use
40 a trailing asterisk to specify globbing.
41
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4210. New $queue_size variable.
43
4411. New variables $local_part_{pre,suf}fix_v.
6656a75a 45
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4612. New main option "sqlite_dbfile", for use in preference to prefixing the
47 lookup string. The older method fails when tainted variables are used
48 in the lookup, as the filename becomes tainted. The new method keeps the
49 filename separate.
a5dc727a 5012. An option on the dsearch lookup, to return the full path.
298849d8 51
9438970c 52
5b195d6b 53
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54Version 4.93
55------------
56
b53c265b 57 1. An "external" authenticator, per RFC 4422 Appendix A.
40ed89b3 58
7f69e814 59 2. A JSON lookup type, and JSON variants of the forall/any expansion conditions.
40ed89b3 60
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61 3. Variables $tls_in_cipher_std, $tls_out_cipher_std giving the RFC names
62 for ciphersuites.
63
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64 4. Log_selectors "msg_id" (on by default) and "msg_id_created".
65
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66 5. A case_insensitive option for verify=not_blind.
67
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68 6. EXPERIMENTAL_TLS_RESUME optional build feature. See the experimental.spec
69 file.
70
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71 7. A main option exim_version to override the version Exim
72 reports in verious places ($exim_version, $version_number).
73
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74 8. Expansion operator ${sha2_N:} for N=256, 384, 512.
75
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76 9. Router variables, $r_... settable from router options and usable in routers
77 and transports.
78
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7910. The spf lookup now supports IPv6.
80
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8111. Main options for DKIM verify to filter hash and key types.
82
86ede124 8312. With TLS1.3, support for full-chain OCSP stapling.
e326959e 84
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8513. Dual-certificate stacks on servers now support OCSP stapling, under OpenSSL.
86
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8714: An smtp:ehlo transport event, for observability of the remote offered features.
88
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8915: Support under OpenSSL for writing NSS-style key files for packet-capture
90 decode. The environment variable SSLKEYLOGFILE is used; if an absolute path
91 it must indicate a file under the spool directory; if relative the the spool
92 directory is prepended. Works on the server side only. Support under
93 GnuTLS was already there, being done purely by the library (server side
94 only, and exim must be run as root).
95
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9616: Command-line option to move messages from one named queue to another.
97
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9817. Variables $tls_in_ver, $tls_out_ver.
99
049782c0 100
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101Version 4.92
102--------------
103
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104 1. ${l_header:<name>} and ${l_h:<name>} expansion items, giving a colon-sep
105 list when there are multiple headers having a given name. This matters
106 when individual headers are wrapped onto multiple lines; with previous
107 facilities hard to parse.
108
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109 2. The ${readsocket } expansion item now takes a "tls" option, doing the
110 obvious thing.
111
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112 3. EXPERIMENTAL_REQUIRETLS and EXPERIMENTAL_PIPE_CONNECT optional build
113 features. See the experimental.spec file.
8ac90765 114
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115 4. If built with SUPPORT_I18N a "utf8_downconvert" option on the smtp transport.
116
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117 5. A "pipelining" log_selector.
118
8442641e 119 6. Builtin macros for supported log_selector and openssl_options values.
12263aa8 120
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121 7. JSON variants of the ${extract } expansion item.
122
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123 8. A "noutf8" debug option, for disabling the UTF-8 characters in debug output.
124
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125 9. TCP Fast Open support on MacOS.
126
d4fd1b83 127Version 4.91
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128--------------
129
130 1. Dual-certificate stacks on servers now support OCSP stapling, under GnuTLS
131 version 3.5.6 or later.
132
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133 2. DANE is now supported under GnuTLS version 3.0.0 or later. Both GnuTLS and
134 OpenSSL versions are moved to mainline support from Experimental.
405074ad 135 New SMTP transport option "dane_require_tls_ciphers".
899b8bbc 136
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137 3. Feature macros for the compiled-in set of malware scanner interfaces.
138
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139 4. SPF support is promoted from Experimental to mainline status. The template
140 src/EDITME makefile does not enable its inclusion.
141
306c6c77 142 5. Logging control for DKIM verification. The existing DKIM log line is
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143 controlled by a "dkim_verbose" selector which is _not_ enabled by default.
144 A new tag "DKIM=<domain>" is added to <= lines by default, controlled by
145 a "dkim" log_selector.
146
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147 6. Receive duration on <= lines, under a new log_selector "receive_time".
148
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149 7. Options "ipv4_only" and "ipv4_prefer" on the dnslookup router and on
150 routing rules in the manualroute router.
151
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152 8. Expansion item ${sha3:<string>} / ${sha3_<N>:<string>} now also supported
153 under OpenSSL version 1.1.1 or later.
154
286b9d5f 155 9. DKIM operations can now use the Ed25519 algorithm in addition to RSA, under
cb78c1a8 156 GnuTLS 3.6.0 or OpenSSL 1.1.1 or later.
286b9d5f 157
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15810. Builtin feature-macros _CRYPTO_HASH_SHA3 and _CRYPTO_SIGN_ED25519, library
159 version dependent.
160
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16111. "exim -bP macro <name>" returns caller-usable status.
162
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16312. Expansion item ${authresults {<machine>}} for creating an
164 Authentication-Results: header.
165
617d3932 16613. EXPERIMENTAL_ARC. See the experimental.spec file.
ddd16464 167 See also new util/renew-opendmarc-tlds.sh script for use with DMARC/ARC.
617d3932 168
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16914: A dane:fail event, intended to facilitate reporting.
170
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17115. "Lightweight" support for Redis Cluster. Requires redis_servers list to
172 contain all the servers in the cluster, all of which must be reachable from
173 the running exim instance. If the cluster has master/slave replication, the
174 list must contain all the master and slave servers.
175
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17616. Add an option to the Avast scanner interface: "pass_unscanned". This
177 allows to treat unscanned files as clean. Files may be unscanned for
178 several reasons: decompression bombs, broken archives.
179
47195144 180
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181Version 4.90
182------------
183
184 1. PKG_CONFIG_PATH can now be set in Local/Makefile;
185 wildcards will be expanded, values are collapsed.
186
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187 2. The ${readsocket } expansion now takes an option to not shutdown the
188 connection after sending the query string. The default remains to do so.
189
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190 3. An smtp transport option "hosts_noproxy_tls" to control whether multiple
191 deliveries on a single TCP connection can maintain a TLS connection
192 open. By default disabled for all hosts, doing so saves the cost of
193 making new TLS sessions, at the cost of having to proxy the data via
194 another process. Logging is also affected.
195
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196 4. A malware connection type for the FPSCAND protocol.
197
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198 5. An option for recipient verify callouts to hold the connection open for
199 further recipients and for delivery.
200
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201 6. The reproducible build $SOURCE_DATE_EPOCH environment variable is now
202 supported.
203
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204 7. Optionally, an alternate format for spool data-files which matches the
205 wire format - meaning more efficient reception and transmission (at the
206 cost of difficulty with standard Unix tools). Only used for messages
207 received using the ESMTP CHUNKING option, and when a new main-section
208 option "spool_wireformat" (false by default) is set.
209
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210 8. New main configuration option "commandline_checks_require_admin" to
211 restrict who can use various introspection options.
212
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213 9. New option modifier "no_check" for quota and quota_filecount
214 appendfile transport.
215
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21610. Variable $smtp_command_history returning a comma-sep list of recent
217 SMTP commands.
218
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21911. Millisecond timetamps in logs, on log_selector "millisec". Also affects
220 log elements QT, DT and D, and timstamps in debug output.
571b2715 221
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22212. TCP Fast Open logging. As a server, logs when the SMTP banner was sent
223 while still in SYN_RECV state; as a client logs when the connection
4a5cbaff 224 is opened with a TFO cookie.
a2673768 225
9e70917d 22613. DKIM support for multiple signing, by domain and/or key-selector.
7c6ec81b 227 DKIM support for multiple hashes, and for alternate-identity tags.
970424a5 228 Builtin macro with default list of signed headers.
484cc1a9 229 Better syntax for specifying oversigning.
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230 The DKIM ACL can override verification status, and status is visible in
231 the data ACL.
d73e45df 232
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23314. Exipick understands -C|--config for an alternative Exim
234 configuration file.
235
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23615. TCP Fast Open used, with data-on-SYN, for client SMTP via SOCKS5 proxy,
237 for ${readsocket } expansions, and for ClamAV.
238
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23916. The "-be" expansion test mode now supports macros. Macros are expanded
240 in test lines, and new macros can be defined.
241
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24217. Support for server-side dual-certificate-stacks (eg. RSA + ECDSA).
243
856d1e16 244
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245Version 4.89
246------------
247
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248 1. Allow relative config file names for ".include"
249
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250 2. A main-section config option "debug_store" to control the checks on
251 variable locations during store-reset. Normally false but can be enabled
12e9bb25 252 when a memory corruption issue is suspected on a production system.
64073d9c 253
fd047340 254
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255Version 4.88
256------------
257
fc16abb4 258 1. The new perl_taintmode option allows to run the embedded perl
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259 interpreter in taint mode.
260
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261 2. New log_selector: dnssec, adds a "DS" tag to acceptance and delivery lines.
262
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263 3. Speculative debugging, via a "kill" option to the "control=debug" ACL
264 modifier.
265
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266 4. New expansion item ${sha3:<string>} / ${sha3_<N>:<string>}.
267 N can be 224, 256 (default), 384, 512.
268 With GnuTLS 3.5.0 or later, only.
269
f59aaaaa 270 5. Facility for named queues: A command-line argument can specify
55e70e76 271 the queue name for a queue operation, and an ACL modifier can set
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272 the queue to be used for a message. A $queue_name variable gives
273 visibility.
28b3821f 274
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275 6. New expansion operators base32/base32d.
276
44bc8f0c 277 7. The CHUNKING ESMTP extension from RFC 3030. May give some slight
7e3ce68e 278 performance increase and network load decrease. Main config option
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279 chunking_advertise_hosts, and smtp transport option hosts_try_chunking
280 for control.
7e3ce68e 281
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282 8. LMDB lookup support, as Experimental. Patch supplied by Andrew Colin Kissa.
283
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284 9. Expansion operator escape8bit, like escape but not touching newline etc..
285
fbbd45ff 28610. Feature macros, generated from compile options. All start with "_HAVE_"
4945f557 287 and go on with some roughly recognisable name. Driver macros, for
383832ef 288 router, transport and authentication drivers; names starting with "_DRIVER_".
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289 Option macros, for each configuration-file option; all start with "_OPT_".
290 Use the "-bP macros" command-line option to see what is present.
fbbd45ff 291
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29211. Integer values for options can take a "G" multiplier.
293
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29412. defer=pass option for the ACL control cutthrough_delivery, to reflect 4xx
295 returns from the target back to the initiator, rather than spooling the
296 message.
297
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29813. New built-in constants available for tls_dhparam and default changed.
299
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30014. If built with EXPERIMENTAL_QUEUEFILE, a queuefile transport, for writing
301 out copies of the message spool files for use by 3rd-party scanners.
302
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30315. A new option on the smtp transport, hosts_try_fastopen. If the system
304 supports it (on Linux it must be enabled in the kernel by the sysadmin)
305 try to use RFC 7413 "TCP Fast Open". No data is sent on the SYN segment
306 but it permits a peer that also supports the facility to send its SMTP
307 banner immediately after the SYN,ACK segment rather then waiting for
308 another ACK - so saving up to one roundtrip time. Because it requires
309 previous communication with the peer (we save a cookie from it) this
f59aaaaa 310 will only become active on frequently-contacted destinations.
fb05276a 311
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31216. A new syslog_pid option to suppress PID duplication in syslog lines.
313
8d042305 314
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315Version 4.87
316------------
317
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318 1. The ACL conditions regex and mime_regex now capture substrings
319 into numeric variables $regex1 to 9, like the "match" expansion condition.
320
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321 2. New $callout_address variable records the address used for a spam=,
322 malware= or verify= callout.
323
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324 3. Transports now take a "max_parallel" option, to limit concurrency.
325
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326 4. Expansion operators ${ipv6norm:<string>} and ${ipv6denorm:<string>}.
327 The latter expands to a 8-element colon-sep set of hex digits including
328 leading zeroes. A trailing ipv4-style dotted-decimal set is converted
329 to hex. Pure ipv4 addresses are converted to IPv4-mapped IPv6.
330 The former operator strips leading zeroes and collapses the longest
331 set of 0-groups to a double-colon.
332
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333 5. New "-bP config" support, to dump the effective configuration.
334
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335 6. New $dkim_key_length variable.
336
9aa35e9c 337 7. New base64d and base64 expansion items (the existing str2b64 being a
59b87190 338 synonym of the latter). Add support in base64 for certificates.
9aa35e9c 339
62b7cd08 340 8. New main configuration option "bounce_return_linesize_limit" to
f59aaaaa 341 avoid oversize bodies in bounces. The default value matches RFC
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342 limits.
343
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344 9. New $initial_cwd expansion variable.
345
0d9b78be 346
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347Version 4.86
348------------
349
350 1. Support for using the system standard CA bundle.
351
352 2. New expansion items $config_file, $config_dir, containing the file
353 and directory name of the main configuration file. Also $exim_version.
354
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355 3. New "malware=" support for Avast.
356
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357 4. New "spam=" variant option for Rspamd.
358
359 5. Assorted options on malware= and spam= scanners.
360
f59aaaaa 361 6. A command-line option to write a comment into the logfile.
cc00f4af 362
7eb6c37c 363 7. If built with EXPERIMENTAL_SOCKS feature enabled, the smtp transport can
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364 be configured to make connections via socks5 proxies.
365
366 8. If built with EXPERIMENTAL_INTERNATIONAL, support is included for
367 the transmission of UTF-8 envelope addresses.
7eb6c37c 368
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369 9. If built with EXPERIMENTAL_INTERNATIONAL, an expansion item for a commonly
370 used encoding of Maildir folder names.
371
b3ef41c9 37210. A logging option for slow DNS lookups.
846430d9 373
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37411. New ${env {<variable>}} expansion.
375
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37612. A non-SMTP authenticator using information from TLS client certificates.
377
10ca4f1c 37813. Main option "tls_eccurve" for selecting an Elliptic Curve for TLS.
65463bc9 379 Patch originally by Wolfgang Breyha.
10ca4f1c 380
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38114. Main option "dns_trust_aa" for trusting your local nameserver at the
382 same level as DNSSEC.
383
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384Version 4.85
385------------
386
387 1. If built with EXPERIMENTAL_DANE feature enabled, Exim will follow the
f59aaaaa 388 DANE SMTP draft to assess a secure chain of trust of the certificate
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389 used to establish the TLS connection based on a TLSA record in the
390 domain of the sender.
391
392 2. The EXPERIMENTAL_TPDA feature has been renamed to EXPERIMENTAL_EVENT
393 and several new events have been created. The reason is because it has
394 been expanded beyond just firing events during the transport phase. Any
395 existing TPDA transport options will have to be rewritten to use a new
396 $event_name expansion variable in a condition. Refer to the
397 experimental-spec.txt for details and examples.
398
399 3. The EXPERIMENTAL_CERTNAMES features is an enhancement to verify that
400 server certs used for TLS match the result of the MX lookup. It does
401 not use the same mechanism as DANE.
402
403
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404Version 4.84
405------------
406
407
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408Version 4.83
409------------
410
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411 1. If built with the EXPERIMENTAL_PROXY feature enabled, Exim can be
412 configured to expect an initial header from a proxy that will make the
413 actual external source IP:host be used in exim instead of the IP of the
414 proxy that is connecting to it.
415
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416 2. New verify option header_names_ascii, which will check to make sure
417 there are no non-ASCII characters in header names. Exim itself handles
418 those non-ASCII characters, but downstream apps may not, so Exim can
419 detect and reject if those characters are present.
420
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421 3. New expansion operator ${utf8clean:string} to replace malformed UTF8
422 codepoints with valid ones.
423
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424 4. New malware type "sock". Talks over a Unix or TCP socket, sending one
425 command line and matching a regex against the return data for trigger
007a2dee 426 and a second regex to extract malware_name. The mail spoolfile name can
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427 be included in the command line.
428
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429 5. The smtp transport now supports options "tls_verify_hosts" and
430 "tls_try_verify_hosts". If either is set the certificate verification
431 is split from the encryption operation. The default remains that a failed
432 verification cancels the encryption.
214042d2 433
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434 6. New SERVERS override of default ldap server list. In the ACLs, an ldap
435 lookup can now set a list of servers to use that is different from the
436 default list.
437
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438 7. New command-line option -C for exiqgrep to specify alternate exim.conf
439 file when searching the queue.
440
f2de3a33 441 8. OCSP now supports GnuTLS also, if you have version 3.1.3 or later of that.
2b4a568d 442
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443 9. Support for DNSSEC on outbound connections.
444
9d1c15ef 44510. New variables "tls_(in,out)_(our,peer)cert" and expansion item
6a8a60e0 446 "certextract" to extract fields from them. Hash operators md5 and sha1
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447 work over them for generating fingerprints, and a new sha256 operator
448 for them added.
9d1c15ef 449
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45011. PRDR is now supported dy default.
451
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45212. OCSP stapling is now supported by default.
453
45413. If built with the EXPERIMENTAL_DSN feature enabled, Exim will output
4c04137d 455 Delivery Status Notification messages in MIME format, and negotiate
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456 DSN features per RFC 3461.
457
6ece2e77 458
2c422e6f 459Version 4.82
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460------------
461
462 1. New command-line option -bI:sieve will list all supported sieve extensions
463 of this Exim build on standard output, one per line.
464 ManageSieve (RFC 5804) providers managing scripts for use by Exim should
465 query this to establish the correct list to include in the protocol's
466 SIEVE capability line.
467
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468 2. If the -n option is combined with the -bP option, then the name of an
469 emitted option is not output, only the value (if visible to you).
470 For instance, "exim -n -bP pid_file_path" should just emit a pathname
471 followed by a newline, and no other text.
472
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473 3. When built with SUPPORT_TLS and USE_GNUTLS, the SMTP transport driver now
474 has a "tls_dh_min_bits" option, to set the minimum acceptable number of
475 bits in the Diffie-Hellman prime offered by a server (in DH ciphersuites)
476 acceptable for security. (Option accepted but ignored if using OpenSSL).
477 Defaults to 1024, the old value. May be lowered only to 512, or raised as
478 far as you like. Raising this may hinder TLS interoperability with other
479 sites and is not currently recommended. Lowering this will permit you to
480 establish a TLS session which is not as secure as you might like.
481
482 Unless you really know what you are doing, leave it alone.
483
1f4a55da 484 4. If not built with DISABLE_DNSSEC, Exim now has the main option
0fbd9bff 485 dns_dnssec_ok; if set to 1 then Exim will initialise the resolver library
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486 to send the DO flag to your recursive resolver. If you have a recursive
487 resolver, which can set the Authenticated Data (AD) flag in results, Exim
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488 can now detect this. Exim does not perform validation itself, instead
489 relying upon a trusted path to the resolver.
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490
491 Current status: work-in-progress; $sender_host_dnssec variable added.
492
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493 5. DSCP support for outbound connections: on a transport using the smtp driver,
494 set "dscp = ef", for instance, to cause the connections to have the relevant
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495 DSCP (IPv4 TOS or IPv6 TCLASS) value in the header.
496
497 Similarly for inbound connections, there is a new control modifier, dscp,
498 so "warn control = dscp/ef" in the connect ACL, or after authentication.
499
500 Supported values depend upon system libraries. "exim -bI:dscp" to list the
501 ones Exim knows of. You can also set a raw number 0..0x3F.
36a3ae5f 502
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503 6. The -G command-line flag is no longer ignored; it is now equivalent to an
504 ACL setting "control = suppress_local_fixups". The -L command-line flag
505 is now accepted and forces use of syslog, with the provided tag as the
506 process name. A few other flags used by Sendmail are now accepted and
507 ignored.
508
976b7e9f 509 7. New cutthrough routing feature. Requested by a "control = cutthrough_delivery"
4c04137d 510 ACL modifier; works for single-recipient mails which are received on and
976b7e9f
JH
511 deliverable via SMTP. Using the connection made for a recipient verify,
512 if requested before the verify, or a new one made for the purpose while
513 the inbound connection is still active. The bulk of the mail item is copied
514 direct from the inbound socket to the outbound (as well as the spool file).
515 When the source notifies the end of data, the data acceptance by the destination
4c04137d 516 is negotiated before the acceptance is sent to the source. If the destination
976b7e9f
JH
517 does not accept the mail item, for example due to content-scanning, the item
518 is not accepted from the source and therefore there is no need to generate
519 a bounce mail. This is of benefit when providing a secondary-MX service.
520 The downside is that delays are under the control of the ultimate destination
521 system not your own.
522
4c04137d 523 The Received-by: header on items delivered by cutthrough is generated
042eb971 524 early in reception rather than at the end; this will affect any timestamp
976b7e9f
JH
525 included. The log line showing delivery is recorded before that showing
526 reception; it uses a new ">>" tag instead of "=>".
06a6f4ed 527
976b7e9f
JH
528 To support the feature, verify-callout connections can now use ESMTP and TLS.
529 The usual smtp transport options are honoured, plus a (new, default everything)
530 hosts_verify_avoid_tls.
531
532 New variable families named tls_in_cipher, tls_out_cipher etc. are introduced
533 for specific access to the information for each connection. The old names
534 are present for now but deprecated.
535
fcc8e047 536 Not yet supported: IGNOREQUOTA, SIZE, PIPELINING.
976b7e9f 537
a64a3dfa
JH
538 8. New expansion operators ${listnamed:name} to get the content of a named list
539 and ${listcount:string} to count the items in a list.
98a90c36 540
2519e60d 541 9. New global option "gnutls_allow_auto_pkcs11", defaults false. The GnuTLS
a5f239e4
PP
542 rewrite in 4.80 combines with GnuTLS 2.12.0 or later, to autoload PKCS11
543 modules. For some situations this is desirable, but we expect admin in
544 those situations to know they want the feature. More commonly, it means
545 that GUI user modules get loaded and are broken by the setuid Exim being
546 unable to access files specified in environment variables and passed
547 through, thus breakage. So we explicitly inhibit the PKCS11 initialisation
548 unless this new option is set.
549
2519e60d
TL
550 Some older OS's with earlier versions of GnuTLS might not have pkcs11 ability,
551 so have also added a build option which can be used to build Exim with GnuTLS
552 but without trying to use any kind of PKCS11 support. Uncomment this in the
553 Local/Makefile:
554
555 AVOID_GNUTLS_PKCS11=yes
556
3e8abda0 55710. The "acl = name" condition on an ACL now supports optional arguments.
bef3ea7f
JH
558 New expansion item "${acl {name}{arg}...}" and expansion condition
559 "acl {{name}{arg}...}" are added. In all cases up to nine arguments
560 can be used, appearing in $acl_arg1 to $acl_arg9 for the called ACL.
561 Variable $acl_narg contains the number of arguments. If the ACL sets
562 a "message =" value this becomes the result of the expansion item,
563 or the value of $value for the expansion condition. If the ACL returns
564 accept the expansion condition is true; if reject, false. A defer
565 return results in a forced fail.
a5f239e4 566
846726c5
JH
56711. Routers and transports can now have multiple headers_add and headers_remove
568 option lines. The concatenated list is used.
569
e7568d51
TL
57012. New ACL modifier "remove_header" can remove headers before message gets
571 handled by routers/transports.
572
3a796370
JH
57313. New dnsdb lookup pseudo-type "a+". A sequence of "a6" (if configured),
574 "aaaa" and "a" lookups is done and the full set of results returned.
575
362145b5 57614. New expansion variable $headers_added with content from ACL add_header
85ffcba6 577 modifier (but not yet added to message).
362145b5 578
bd0fff00 57915. New 8bitmime status logging option for received messages. Log field "M8S".
3c0a92dc 580
c8e2fc1e
JH
58116. New authenticated_sender logging option, adding to log field "A".
582
181d9bf8 58317. New expansion variables $router_name and $transport_name. Useful
f59aaaaa 584 particularly for debug_print as -bt command-line option does not
2a47f028 585 require privilege whereas -d does.
181d9bf8 586
fd98a5c6
JH
58718. If built with EXPERIMENTAL_PRDR, per-recipient data responses per a
588 proposed extension to SMTP from Eric Hall.
589
700d22f3
PP
59019. The pipe transport has gained the force_command option, to allow
591 decorating commands from user .forward pipe aliases with prefix
592 wrappers, for instance.
593
fcc8e047
JH
59420. Callout connections can now AUTH; the same controls as normal delivery
595 connections apply.
596
b1f37849
TL
59721. Support for DMARC, using opendmarc libs, can be enabled. It adds new
598 options: dmarc_forensic_sender, dmarc_history_file, and dmarc_tld_file.
599 It adds new expansion variables $dmarc_ar_header, $dmarc_status,
600 $dmarc_status_text, and $dmarc_used_domain. It adds a new acl modifier
601 dmarc_status. It adds new control flags dmarc_disable_verify and
687cac44
HSHR
602 dmarc_enable_forensic. The default for the dmarc_tld_file option is
603 "/etc/exim/opendmarc.tlds" and can be changed via EDITME.
b1f37849
TL
604
60522. Add expansion variable $authenticated_fail_id, which is the username
606 provided to the authentication method which failed. It is available
607 for use in subsequent ACL processing (typically quit or notquit ACLs).
608
4c04137d 60923. New ACL modifier "udpsend" can construct a UDP packet to send to a given
7142daca
PP
610 UDP host and port.
611
61224. New ${hexquote:..string..} expansion operator converts non-printable
613 characters in the string to \xNN form.
614
1a7b746d
TL
61525. Experimental TPDA (Transport Post Delivery Action) function added.
616 Patch provided by Axel Rau.
617
4dd78911
TL
61826. Experimental Redis lookup added. Patch provided by Warren Baker.
619
181d9bf8 620
b1770b6e 621Version 4.80
c1e794ba
PP
622------------
623
624 1. New authenticator driver, "gsasl". Server-only (at present).
625 This is a SASL interface, licensed under GPL, which can be found at
626 http://www.gnu.org/software/gsasl/.
627 This system does not provide sources of data for authentication, so
3b4f55a3 628 careful use needs to be made of the conditions in Exim.
c1e794ba 629
97753960
PP
630 2. New authenticator driver, "heimdal_gssapi". Server-only.
631 A replacement for using cyrus_sasl with Heimdal, now that $KRB5_KTNAME
632 is no longer honoured for setuid programs by Heimdal. Use the
633 "server_keytab" option to point to the keytab.
634
252e0c7b
PP
635 3. The "pkg-config" system can now be used when building Exim to reference
636 cflags and library information for lookups and authenticators, rather
637 than having to update "CFLAGS", "AUTH_LIBS", "LOOKUP_INCLUDE" and
7e6a8985
PP
638 "LOOKUP_LIBS" directly. Similarly for handling the TLS library support
639 without adjusting "TLS_INCLUDE" and "TLS_LIBS".
252e0c7b 640
6a6084f8
PP
641 In addition, setting PCRE_CONFIG=yes will query the pcre-config tool to
642 find the headers and libraries for PCRE.
643
f1e05cc7 644 4. New expansion variable $tls_bits.
20aa9dbd 645
4a6a987a
PP
646 5. New lookup type, "dbmjz". Key is an Exim list, the elements of which will
647 be joined together with ASCII NUL characters to construct the key to pass
3b4f55a3
PP
648 into the DBM library. Can be used with gsasl to access sasldb2 files as
649 used by Cyrus SASL.
4a6a987a 650
da3ad30d
PP
651 6. OpenSSL now supports TLS1.1 and TLS1.2 with OpenSSL 1.0.1.
652
653 Avoid release 1.0.1a if you can. Note that the default value of
654 "openssl_options" is no longer "+dont_insert_empty_fragments", as that
655 increased susceptibility to attack. This may still have interoperability
656 implications for very old clients (see version 4.31 change 37) but
657 administrators can choose to make the trade-off themselves and restore
658 compatibility at the cost of session security.
659
7be682ca
PP
660 7. Use of the new expansion variable $tls_sni in the main configuration option
661 tls_certificate will cause Exim to re-expand the option, if the client
662 sends the TLS Server Name Indication extension, to permit choosing a
663 different certificate; tls_privatekey will also be re-expanded. You must
664 still set these options to expand to valid files when $tls_sni is not set.
3f0945ff
PP
665
666 The SMTP Transport has gained the option tls_sni, which will set a hostname
667 for outbound TLS sessions, and set $tls_sni too.
668
669 A new log_selector, +tls_sni, has been added, to log received SNI values
670 for Exim as a server.
671
9cbad13b
PP
672 8. The existing "accept_8bitmime" option now defaults to true. This means
673 that Exim is deliberately not strictly RFC compliant. We're following
674 Dan Bernstein's advice in http://cr.yp.to/smtp/8bitmime.html by default.
675 Those who disagree, or know that they are talking to mail servers that,
676 even today, are not 8-bit clean, need to turn off this option.
677
9ee44efb
PP
678 9. Exim can now be started with -bw (with an optional timeout, given as
679 -bw<timespec>). With this, stdin at startup is a socket that is
680 already listening for connections. This has a more modern name of
681 "socket activation", but forcing the activated socket to fd 0. We're
682 interested in adding more support for modern variants.
683
eae0036b 68410. ${eval } now uses 64-bit values on supporting platforms. A new "G" suffix
97d17305
JH
685 for numbers indicates multiplication by 1024^3.
686
17c76198
PP
68711. The GnuTLS support has been revamped; the three options gnutls_require_kx,
688 gnutls_require_mac & gnutls_require_protocols are no longer supported.
689 tls_require_ciphers is now parsed by gnutls_priority_init(3) as a priority
690 string, documentation for which is at:
42bfef1e 691 http://www.gnutls.org/manual/html_node/Priority-Strings.html
17c76198
PP
692
693 SNI support has been added to Exim's GnuTLS integration too.
694
af3498d6
PP
695 For sufficiently recent GnuTLS libraries, ${randint:..} will now use
696 gnutls_rnd(), asking for GNUTLS_RND_NONCE level randomness.
697
53947857 69812. With OpenSSL, if built with EXPERIMENTAL_OCSP, a new option tls_ocsp_file
3f7eeb86
PP
699 is now available. If the contents of the file are valid, then Exim will
700 send that back in response to a TLS status request; this is OCSP Stapling.
701 Exim will not maintain the contents of the file in any way: administrators
702 are responsible for ensuring that it is up-to-date.
703
704 See "experimental-spec.txt" for more details.
705
eae0036b
PP
70613. ${lookup dnsdb{ }} supports now SPF record types. They are handled
707 identically to TXT record lookups.
708
2605c55b 70914. New expansion variable $tod_epoch_l for higher-precision time.
c1e794ba 710
3375e053
PP
71115. New global option tls_dh_max_bits, defaulting to current value of NSS
712 hard-coded limit of DH ephemeral bits, to fix interop problems caused by
713 GnuTLS 2.12 library recommending a bit count higher than NSS supports.
714
a799883d
PP
71516. tls_dhparam now used by both OpenSSL and GnuTLS, can be path or identifier.
716 Option can now be a path or an identifier for a standard prime.
717 If unset, we use the DH prime from section 2.2 of RFC 5114, "ike23".
718 Set to "historic" to get the old GnuTLS behaviour of auto-generated DH
719 primes.
720
3ecab157 72117. SSLv2 now disabled by default in OpenSSL. (Never supported by GnuTLS).
f0f5a555
PP
722 Use "openssl_options -no_sslv2" to re-enable support, if your OpenSSL
723 install was not built with OPENSSL_NO_SSL2 ("no-ssl2").
724
9e45c72b 725
3ce96ada
TF
726Version 4.77
727------------
728
729 1. New options for the ratelimit ACL condition: /count= and /unique=.
730 The /noupdate option has been replaced by a /readonly option.
731
061b7ebd
PP
732 2. The SMTP transport's protocol option may now be set to "smtps", to
733 use SSL-on-connect outbound.
734
9e949f00
PP
735 3. New variable $av_failed, set true if the AV scanner deferred; ie, when
736 there is a problem talking to the AV scanner, or the AV scanner running.
737
39257585
PP
738 4. New expansion conditions, "inlist" and "inlisti", which take simple lists
739 and check if the search item is a member of the list. This does not
740 support named lists, but does subject the list part to string expansion.
741
742 5. Unless the new EXPAND_LISTMATCH_RHS build option is set when Exim was
743 built, Exim no longer performs string expansion on the second string of
744 the match_* expansion conditions: "match_address", "match_domain",
745 "match_ip" & "match_local_part". Named lists can still be used.
746
7c6d71af 747
e97d1f08
PP
748Version 4.76
749------------
750
751 1. The global option "dns_use_edns0" may be set to coerce EDNS0 usage on
752 or off in the resolver library.
753
754
bc19a55b
PP
755Version 4.75
756------------
757
758 1. In addition to the existing LDAP and LDAP/SSL ("ldaps") support, there
759 is now LDAP/TLS support, given sufficiently modern OpenLDAP client
760 libraries. The following global options have been added in support of
761 this: ldap_ca_cert_dir, ldap_ca_cert_file, ldap_cert_file, ldap_cert_key,
762 ldap_cipher_suite, ldap_require_cert, ldap_start_tls.
763
2fe76745
PP
764 2. The pipe transport now takes a boolean option, "freeze_signal", default
765 false. When true, if the external delivery command exits on a signal then
766 Exim will freeze the message in the queue, instead of generating a bounce.
767
f1e5fef5
PP
768 3. Log filenames may now use %M as an escape, instead of %D (still available).
769 The %M pattern expands to yyyymm, providing month-level resolution.
770
332f5cf3
PP
771 4. The $message_linecount variable is now updated for the maildir_tag option,
772 in the same way as $message_size, to reflect the real number of lines,
773 including any header additions or removals from transport.
774
29cfeb94
PP
775 5. When contacting a pool of SpamAssassin servers configured in spamd_address,
776 Exim now selects entries randomly, to better scale in a cluster setup.
777
bc19a55b 778
a01ba081
PP
779Version 4.74
780------------
781
1670ef10
PP
782 1. SECURITY FIX: privilege escalation flaw fixed. On Linux (and only Linux)
783 the flaw permitted the Exim run-time user to cause root to append to
784 arbitrary files of the attacker's choosing, with the content based
785 on content supplied by the attacker.
786
787 2. Exim now supports loading some lookup types at run-time, using your
a01ba081
PP
788 platform's dlopen() functionality. This has limited platform support
789 and the intention is not to support every variant, it's limited to
790 dlopen(). This permits the main Exim binary to not be linked against
791 all the libraries needed for all the lookup types.
792
793
77bb000f
PP
794Version 4.73
795------------
796
2cfd3221
PP
797 NOTE: this version is not guaranteed backwards-compatible, please read the
798 items below carefully
799
77bb000f
PP
800 1. A new main configuration option, "openssl_options", is available if Exim
801 is built with SSL support provided by OpenSSL. The option allows
802 administrators to specify OpenSSL options to be used on connections;
803 typically this is to set bug compatibility features which the OpenSSL
804 developers have not enabled by default. There may be security
805 consequences for certain options, so these should not be changed
806 frivolously.
807
a29e5231
PP
808 2. A new pipe transport option, "permit_coredumps", may help with problem
809 diagnosis in some scenarios. Note that Exim is typically installed as
810 a setuid binary, which on most OSes will inhibit coredumps by default,
43236f35 811 so that safety mechanism would have to be overridden for this option to
a29e5231
PP
812 be able to take effect.
813
8544e77a
PP
814 3. ClamAV 0.95 is now required for ClamAV support in Exim, unless
815 Local/Makefile sets: WITH_OLD_CLAMAV_STREAM=yes
816 Note that this switches Exim to use a new API ("INSTREAM") and a future
817 release of ClamAV will remove support for the old API ("STREAM").
818
819 The av_scanner option, when set to "clamd", now takes an optional third
820 part, "local", which causes Exim to pass a filename to ClamAV instead of
821 the file content. This is the same behaviour as when clamd is pointed at
822 a Unix-domain socket. For example:
823
824 av_scanner = clamd:192.0.2.3 1234:local
825
491fab4c
PP
826 ClamAV's ExtendedDetectionInfo response format is now handled.
827
8544e77a
PP
828 4. There is now a -bmalware option, restricted to admin users. This option
829 takes one parameter, a filename, and scans that file with Exim's
830 malware-scanning framework. This is intended purely as a debugging aid
831 to ensure that Exim's scanning is working, not to replace other tools.
a9622bc6
PP
832 Note that the ACL framework is not invoked, so if av_scanner references
833 ACL variables without a fallback then this will fail.
8544e77a 834
83e029d5
PP
835 5. There is a new expansion operator, "reverse_ip", which will reverse IP
836 addresses; IPv4 into dotted quad, IPv6 into dotted nibble. Examples:
837
838 ${reverse_ip:192.0.2.4}
839 -> 4.2.0.192
840 ${reverse_ip:2001:0db8:c42:9:1:abcd:192.0.2.3}
841 -> 3.0.2.0.0.0.0.c.d.c.b.a.1.0.0.0.9.0.0.0.2.4.c.0.8.b.d.0.1.0.0.2
842
ed7f7860
PP
843 6. There is a new ACL control called "debug", to enable debug logging.
844 This allows selective logging of certain incoming transactions within
845 production environments, with some care. It takes two options, "tag"
846 and "opts"; "tag" is included in the filename of the log and "opts"
847 is used as per the -d<options> command-line option. Examples, which
848 don't all make sense in all contexts:
849
850 control = debug
851 control = debug/tag=.$sender_host_address
852 control = debug/opts=+expand+acl
853 control = debug/tag=.$message_exim_id/opts=+expand
854
10385c15
PP
855 7. It has always been implicit in the design and the documentation that
856 "the Exim user" is not root. src/EDITME said that using root was
857 "very strongly discouraged". This is not enough to keep people from
858 shooting themselves in the foot in days when many don't configure Exim
859 themselves but via package build managers. The security consequences of
860 running various bits of network code are severe if there should be bugs in
861 them. As such, the Exim user may no longer be root. If configured
862 statically, Exim will refuse to build. If configured as ref:user then Exim
863 will exit shortly after start-up. If you must shoot yourself in the foot,
864 then henceforth you will have to maintain your own local patches to strip
865 the safeties off.
866
06a6f4ed 867 8. There is a new expansion condition, bool_lax{}. Where bool{} uses the ACL
6a8de854
PP
868 condition logic to determine truth/failure and will fail to expand many
869 strings, bool_lax{} uses the router condition logic, where most strings
870 do evaluate true.
871 Note: bool{00} is false, bool_lax{00} is true.
872
06a6f4ed 873 9. Routers now support multiple "condition" tests.
532be449 874
5dc43717
JJ
87510. There is now a runtime configuration option "tcp_wrappers_daemon_name".
876 Setting this allows an admin to define which entry in the tcpwrappers
877 config file will be used to control access to the daemon. This option
878 is only available when Exim is built with USE_TCP_WRAPPERS. The
879 default value is set at build time using the TCP_WRAPPERS_DAEMON_NAME
880 build option.
881
79d4bc3d
PP
88211. [POSSIBLE CONFIG BREAKAGE] The default value for system_filter_user is now
883 the Exim run-time user, instead of root.
884
2cfd3221
PP
88512. [POSSIBLE CONFIG BREAKAGE] ALT_CONFIG_ROOT_ONLY is no longer optional and
886 is forced on. This is mitigated by the new build option
90b6341f 887 TRUSTED_CONFIG_LIST which defines a list of configuration files which
7f7f0545
DW
888 are trusted; one per line. If a config file is owned by root and matches
889 a pathname in the list, then it may be invoked by the Exim build-time
890 user without Exim relinquishing root privileges.
2cfd3221
PP
891
89213. [POSSIBLE CONFIG BREAKAGE] The Exim user is no longer automatically
893 trusted to supply -D<Macro[=Value]> overrides on the command-line. Going
90b6341f
DW
894 forward, we recommend using TRUSTED_CONFIG_LIST with shim configs that
895 include the main config. As a transition mechanism, we are temporarily
896 providing a work-around: the new build option WHITELIST_D_MACROS provides
43236f35 897 a colon-separated list of macro names which may be overridden by the Exim
90b6341f
DW
898 run-time user. The values of these macros are constrained to the regex
899 ^[A-Za-z0-9_/.-]*$ (which explicitly does allow for empty values).
2cfd3221 900
77bb000f 901
3fc596e4
NM
902Version 4.72
903------------
904
b26eacf1
PP
905 1. TWO SECURITY FIXES: one relating to mail-spools which are globally
906 writable, the other to locking of MBX folders (not mbox).
907
908 2. MySQL stored procedures are now supported.
909
910 3. The dkim_domain transport option is now a list, not a single string, and
911 messages will be signed for each element in the list (discarding
912 duplicates).
913
914 4. The 4.70 release unexpectedly changed the behaviour of dnsdb TXT lookups
915 in the presence of multiple character strings within the RR. Prior to 4.70,
916 only the first string would be returned. The dnsdb lookup now, by default,
917 preserves the pre-4.70 semantics, but also now takes an extended output
8f425947
PP
918 separator specification. The separator can be followed by a semicolon, to
919 concatenate the individual text strings together with no join character,
920 or by a comma and a second separator character, in which case the text
921 strings within a TXT record are joined on that second character.
922 Administrators are reminded that DNS provides no ordering guarantees
923 between multiple records in an RRset. For example:
b26eacf1
PP
924
925 foo.example. IN TXT "a" "b" "c"
926 foo.example. IN TXT "d" "e" "f"
927
928 ${lookup dnsdb{>/ txt=foo.example}} -> "a/d"
929 ${lookup dnsdb{>/; txt=foo.example}} -> "def/abc"
8f425947 930 ${lookup dnsdb{>/,+ txt=foo.example}} -> "a+b+c/d+e+f"
b26eacf1 931
3fc596e4 932
f33253cc
NM
933Version 4.70 / 4.71
934-------------------
65a7d8c3 935
7c6d71af 936 1. Native DKIM support without an external library.
a8c8d6b5
JJ
937 (Note that if no action to prevent it is taken, a straight upgrade will
938 result in DKIM verification of all signed incoming emails. See spec
939 for details on conditionally disabling)
7c6d71af
NM
940
941 2. Experimental DCC support via dccifd (contributed by Wolfgang Breyha).
65a7d8c3 942
f33253cc 943 3. There is now a bool{} expansion condition which maps certain strings to
7d9f747b 944 true/false condition values (most likely of use in conjunction with the
f33253cc
NM
945 and{} expansion operator).
946
947 4. The $spam_score, $spam_bar and $spam_report variables are now available
948 at delivery time.
949
950 5. exim -bP now supports "macros", "macro_list" or "macro MACRO_NAME" as
951 options, provided that Exim is invoked by an admin_user.
952
953 6. There is a new option gnutls_compat_mode, when linked against GnuTLS,
954 which increases compatibility with older clients at the cost of decreased
955 security. Don't set this unless you need to support such clients.
956
957 7. There is a new expansion operator, ${randint:...} which will produce a
958 "random" number less than the supplied integer. This randomness is
959 not guaranteed to be cryptographically strong, but depending upon how
960 Exim was built may be better than the most naive schemes.
961
962 8. Exim now explicitly ensures that SHA256 is available when linked against
963 OpenSSL.
964
965 9. The transport_filter_timeout option now applies to SMTP transports too.
966
65a7d8c3 967
7d9f747b
PP
968Version 4.69
969------------
970
971 1. Preliminary DKIM support in Experimental.
972
973
2b85bce7
PH
974Version 4.68
975------------
976
977 1. The body_linecount and body_zerocount C variables are now exported in the
978 local_scan API.
979
93655c46
PH
980 2. When a dnslists lookup succeeds, the key that was looked up is now placed
981 in $dnslist_matched. When the key is an IP address, it is not reversed in
982 this variable (though it is, of course, in the actual lookup). In simple
983 cases, for example:
984
985 deny dnslists = spamhaus.example
986
987 the key is also available in another variable (in this case,
988 $sender_host_address). In more complicated cases, however, this is not
989 true. For example, using a data lookup might generate a dnslists lookup
990 like this:
991
992 deny dnslists = spamhaus.example/<|192.168.1.2|192.168.6.7|...
993
994 If this condition succeeds, the value in $dnslist_matched might be
995 192.168.6.7 (for example).
996
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997 3. Authenticators now have a client_condition option. When Exim is running as
998 a client, it skips an authenticator whose client_condition expansion yields
999 "0", "no", or "false". This can be used, for example, to skip plain text
1000 authenticators when the connection is not encrypted by a setting such as:
1001
1002 client_condition = ${if !eq{$tls_cipher}{}}
1003
1004 Note that the 4.67 documentation states that $tls_cipher contains the
1005 cipher used for incoming messages. In fact, during SMTP delivery, it
1006 contains the cipher used for the delivery. The same is true for
1007 $tls_peerdn.
1008
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1009 4. There is now a -Mvc <message-id> option, which outputs a copy of the
1010 message to the standard output, in RFC 2822 format. The option can be used
1011 only by an admin user.
1012
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1013 5. There is now a /noupdate option for the ratelimit ACL condition. It
1014 computes the rate and checks the limit as normal, but it does not update
1015 the saved data. This means that, in relevant ACLs, it is possible to lookup
1016 the existence of a specified (or auto-generated) ratelimit key without
1017 incrementing the ratelimit counter for that key.
1018
1019 In order for this to be useful, another ACL entry must set the rate
1020 for the same key somewhere (otherwise it will always be zero).
1021
1022 Example:
1023
1024 acl_check_connect:
1025 # Read the rate; if it doesn't exist or is below the maximum
1026 # we update it below
1027 deny ratelimit = 100 / 5m / strict / noupdate
1028 log_message = RATE: $sender_rate / $sender_rate_period \
1029 (max $sender_rate_limit)
1030
1031 [... some other logic and tests...]
1032
1033 warn ratelimit = 100 / 5m / strict / per_cmd
1034 log_message = RATE UPDATE: $sender_rate / $sender_rate_period \
1035 (max $sender_rate_limit)
1036 condition = ${if le{$sender_rate}{$sender_rate_limit}}
1037
1038 accept
1039
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1040 6. The variable $max_received_linelength contains the number of bytes in the
1041 longest line that was received as part of the message, not counting the
1042 line termination character(s).
1043
aded2255 1044 7. Host lists can now include +ignore_defer and +include_defer, analogous to
d52120f2
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1045 +ignore_unknown and +include_unknown. These options should be used with
1046 care, probably only in non-critical host lists such as whitelists.
1047
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1048 8. There's a new option called queue_only_load_latch, which defaults true.
1049 If set false when queue_only_load is greater than zero, Exim re-evaluates
1050 the load for each incoming message in an SMTP session. Otherwise, once one
1051 message is queued, the remainder are also.
1052
4f054c63 1053 9. There is a new ACL, specified by acl_smtp_notquit, which is run in most
8f128379
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1054 cases when an SMTP session ends without sending QUIT. However, when Exim
1055 itself is is bad trouble, such as being unable to write to its log files,
1056 this ACL is not run, because it might try to do things (such as write to
1057 log files) that make the situation even worse.
1058
1059 Like the QUIT ACL, this new ACL is provided to make it possible to gather
1060 statistics. Whatever it returns (accept or deny) is immaterial. The "delay"
1061 modifier is forbidden in this ACL.
1062
1063 When the NOTQUIT ACL is running, the variable $smtp_notquit_reason is set
1064 to a string that indicates the reason for the termination of the SMTP
1065 connection. The possible values are:
1066
1067 acl-drop Another ACL issued a "drop" command
1068 bad-commands Too many unknown or non-mail commands
1069 command-timeout Timeout while reading SMTP commands
1070 connection-lost The SMTP connection has been lost
1071 data-timeout Timeout while reading message data
1072 local-scan-error The local_scan() function crashed
1073 local-scan-timeout The local_scan() function timed out
1074 signal-exit SIGTERM or SIGINT
1075 synchronization-error SMTP synchronization error
1076 tls-failed TLS failed to start
1077
1078 In most cases when an SMTP connection is closed without having received
1079 QUIT, Exim sends an SMTP response message before actually closing the
1080 connection. With the exception of acl-drop, the default message can be
1081 overridden by the "message" modifier in the NOTQUIT ACL. In the case of a
1082 "drop" verb in another ACL, it is the message from the other ACL that is
1083 used.
1084
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108510. For MySQL and PostgreSQL lookups, it is now possible to specify a list of
1086 servers with individual queries. This is done by starting the query with
1087 "servers=x:y:z;", where each item in the list may take one of two forms:
1088
1089 (1) If it is just a host name, the appropriate global option (mysql_servers
1090 or pgsql_servers) is searched for a host of the same name, and the
1091 remaining parameters (database, user, password) are taken from there.
1092
1093 (2) If it contains any slashes, it is taken as a complete parameter set.
1094
1095 The list of servers is used in exactly the same was as the global list.
1096 Once a connection to a server has happened and a query has been
1097 successfully executed, processing of the lookup ceases.
1098
1099 This feature is intended for use in master/slave situations where updates
1100 are occurring, and one wants to update a master rather than a slave. If the
1101 masters are in the list for reading, you might have:
1102
1103 mysql_servers = slave1/db/name/pw:slave2/db/name/pw:master/db/name/pw
1104
1105 In an updating lookup, you could then write
1106
1107 ${lookup mysql{servers=master; UPDATE ...}
1108
1109 If, on the other hand, the master is not to be used for reading lookups:
1110
1111 pgsql_servers = slave1/db/name/pw:slave2/db/name/pw
1112
1113 you can still update the master by
1114
1115 ${lookup pgsql{servers=master/db/name/pw; UPDATE ...}
1116
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111711. The message_body_newlines option (default FALSE, for backwards
1118 compatibility) can be used to control whether newlines are present in
1119 $message_body and $message_body_end. If it is FALSE, they are replaced by
1120 spaces.
1121
2b85bce7 1122
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1123Version 4.67
1124------------
1125
1126 1. There is a new log selector called smtp_no_mail, which is not included in
1127 the default setting. When it is set, a line is written to the main log
1128 whenever an accepted SMTP connection terminates without having issued a
4aa45c31 1129 MAIL command.
b4ed4da0 1130
431b7361 1131 2. When an item in a dnslists list is followed by = and & and a list of IP
4aa45c31
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1132 addresses, the behaviour was not clear when the lookup returned more than
1133 one IP address. This has been solved by the addition of == and =& for "all"
93655c46 1134 rather than the default "any" matching.
431b7361 1135
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1136 3. Up till now, the only control over which cipher suites GnuTLS uses has been
1137 for the cipher algorithms. New options have been added to allow some of the
1138 other parameters to be varied.
431b7361 1139
4aa45c31
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1140 4. There is a new compile-time option called ENABLE_DISABLE_FSYNC. When it is
1141 set, Exim compiles a runtime option called disable_fsync.
431b7361 1142
4aa45c31 1143 5. There is a new variable called $smtp_count_at_connection_start.
431b7361 1144
4aa45c31 1145 6. There's a new control called no_pipelining.
cf8b11a5 1146
41c7c167 1147 7. There are two new variables called $sending_ip_address and $sending_port.
4aa45c31 1148 These are set whenever an SMTP connection to another host has been set up.
41c7c167
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1149
1150 8. The expansion of the helo_data option in the smtp transport now happens
4aa45c31 1151 after the connection to the server has been made.
41c7c167 1152
9c57cbc0 1153 9. There is a new expansion operator ${rfc2047d: that decodes strings that
4aa45c31 1154 are encoded as per RFC 2047.
9c57cbc0 1155
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115610. There is a new log selector called "pid", which causes the current process
1157 id to be added to every log line, in square brackets, immediately after the
1158 time and date.
1159
047bdd8c 116011. Exim has been modified so that it flushes SMTP output before implementing
4c590bd1
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1161 a delay in an ACL. It also flushes the output before performing a callout,
1162 as this can take a substantial time. These behaviours can be disabled by
1163 obeying control = no_delay_flush or control = no_callout_flush,
4aa45c31 1164 respectively, at some earlier stage of the connection.
047bdd8c 1165
0ce9abe6 116612. There are two new expansion conditions that iterate over a list. They are
4aa45c31 1167 called forany and forall.
0ce9abe6 1168
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116913. There's a new global option called dsn_from that can be used to vary the
1170 contents of From: lines in bounces and other automatically generated
1171 messages ("delivery status notifications" - hence the name of the option).
0e22dfd1 1172
4aa45c31 117314. The smtp transport has a new option called hosts_avoid_pipelining.
c51b8e75 1174
75b1493f 117515. By default, exigrep does case-insensitive matches. There is now a -I option
4aa45c31 1176 that makes it case-sensitive.
29f89cad 1177
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117816. A number of new features ("addresses", "map", "filter", and "reduce") have
1179 been added to string expansions to make it easier to process lists of
1180 items, typically addresses.
29f89cad 1181
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PH
118217. There's a new ACL modifier called "continue". It does nothing of itself,
1183 and processing of the ACL always continues with the next condition or
1184 modifier. It is provided so that the side effects of expanding its argument
4aa45c31 1185 can be used.
c3611384 1186
ec95d1a6 118718. It is now possible to use newline and other control characters (those with
4aa45c31 1188 values less than 32, plus DEL) as separators in lists.
ec95d1a6 1189
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119019. The exigrep utility now has a -v option, which inverts the matching
1191 condition.
1192
c456d9bb 119320. The host_find_failed option in the manualroute router can now be set to
4aa45c31 1194 "ignore".
c456d9bb 1195
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1196
1197Version 4.66
1198------------
1199
1200No new features were added to 4.66.
1201
1202
1203Version 4.65
1204------------
1205
1206No new features were added to 4.65.
1207
38a0a95f
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1208
1209Version 4.64
1210------------
1211
af561417
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1212 1. ACL variables can now be given arbitrary names, as long as they start with
1213 "acl_c" or "acl_m" (for connection variables and message variables), are at
1214 least six characters long, with the sixth character being either a digit or
883335dc 1215 an underscore.
af561417
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1216
1217 2. There is a new ACL modifier called log_reject_target. It makes it possible
883335dc 1218 to specify which logs are used for messages about ACL rejections.
af561417
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1219
1220 3. There is a new authenticator called "dovecot". This is an interface to the
1221 authentication facility of the Dovecot POP/IMAP server, which can support a
883335dc 1222 number of authentication methods.
af561417
PH
1223
1224 4. The variable $message_headers_raw provides a concatenation of all the
1225 messages's headers without any decoding. This is in contrast to
1226 $message_headers, which does RFC2047 decoding on the header contents.
1227
883335dc
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1228 5. In a DNS black list, if two domain names, comma-separated, are given, the
1229 second is used first to do an initial check, making use of any IP value
1230 restrictions that are set. If there is a match, the first domain is used,
1231 without any IP value restrictions, to get the TXT record.
af561417 1232
883335dc 1233 6. All authenticators now have a server_condition option.
af561417
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1234
1235 7. There is a new command-line option called -Mset. It is useful only in
1236 conjunction with -be (that is, when testing string expansions). It must be
1237 followed by a message id; Exim loads the given message from its spool
883335dc 1238 before doing the expansions.
af561417
PH
1239
1240 8. Another similar new command-line option is called -bem. It operates like
883335dc
PH
1241 -be except that it must be followed by the name of a file that contains a
1242 message.
af561417
PH
1243
1244 9. When an address is delayed because of a 4xx response to a RCPT command, it
1245 is now the combination of sender and recipient that is delayed in
883335dc 1246 subsequent queue runs until its retry time is reached.
af561417
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1247
124810. Unary negation and the bitwise logical operators and, or, xor, not, and
883335dc 1249 shift, have been added to the eval: and eval10: expansion items.
48c7f9e2 1250
194cc0e4
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125111. The variables $interface_address and $interface_port have been renamed
1252 as $received_ip_address and $received_port, to make it clear that they
1253 relate to message reception rather than delivery. (The old names remain
1254 available for compatibility.)
1255
883335dc
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125612. The "message" modifier can now be used on "accept" and "discard" acl verbs
1257 to vary the message that is sent when an SMTP command is accepted.
4e88a19f 1258
495ae4b0 1259
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1260Version 4.63
1261------------
1262
12631. There is a new Boolean option called filter_prepend_home for the redirect
38a0a95f 1264 router.
4608d683 1265
45b91596
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12662. There is a new acl, set by acl_not_smtp_start, which is run right at the
1267 start of receiving a non-SMTP message, before any of the message has been
38a0a95f 1268 read.
45b91596 1269
a5bd321b
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12703. When an SMTP error message is specified in a "message" modifier in an ACL,
1271 or in a :fail: or :defer: message in a redirect router, Exim now checks the
38a0a95f 1272 start of the message for an SMTP error code.
a5bd321b 1273
6ec97b1b 12744. There is a new parameter for LDAP lookups called "referrals", which takes
38a0a95f 1275 one of the settings "follow" (the default) or "nofollow".
6ec97b1b 1276
e22ca4ac
JJ
12775. Version 20070721.2 of exipick now included, offering these new options:
1278 --reverse
1279 After all other sorting options have bee processed, reverse order
1280 before displaying messages (-R is synonym).
1281 --random
1282 Randomize order of matching messages before displaying.
1283 --size
1284 Instead of displaying the matching messages, display the sum
1285 of their sizes.
1286 --sort <variable>[,<variable>...]
1287 Before displaying matching messages, sort the messages according to
1288 each messages value for each variable.
1289 --not
1290 Negate the value for every test (returns inverse output from the
1291 same criteria without --not).
1292
4608d683 1293
1cce3af8
PH
1294Version 4.62
1295------------
1296
12971. The ${readsocket expansion item now supports Internet domain sockets as well
1298 as Unix domain sockets. If the first argument begins "inet:", it must be of
1299 the form "inet:host:port". The port is mandatory; it may be a number or the
1300 name of a TCP port in /etc/services. The host may be a name, or it may be an
1301 IP address. An ip address may optionally be enclosed in square brackets.
1302 This is best for IPv6 addresses. For example:
1303
1304 ${readsocket{inet:[::1]:1234}{<request data>}...
1305
1306 Only a single host name may be given, but if looking it up yield more than
1307 one IP address, they are each tried in turn until a connection is made. Once
1308 a connection has been made, the behaviour is as for ${readsocket with a Unix
1309 domain socket.
1310
f7fd3850
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13112. If a redirect router sets up file or pipe deliveries for more than one
1312 incoming address, and the relevant transport has batch_max set greater than
1313 one, a batch delivery now occurs.
1314
d6629cdc
PH
13153. The appendfile transport has a new option called maildirfolder_create_regex.
1316 Its value is a regular expression. For a maildir delivery, this is matched
1317 against the maildir directory; if it matches, Exim ensures that a
1318 maildirfolder file is created alongside the new, cur, and tmp directories.
1319
1cce3af8 1320
7e66e54d
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1321Version 4.61
1322------------
1323
4f578862
PH
1324The documentation is up-to-date for the 4.61 release. Major new features since
1325the 4.60 release are:
1326
1327. An option called disable_ipv6, to disable the use of IPv6 completely.
1328
1329. An increase in the number of ACL variables to 20 of each type.
1330
1331. A change to use $auth1, $auth2, and $auth3 in authenticators instead of $1,
1332 $2, $3, (though those are still set) because the numeric variables get used
1333 for other things in complicated expansions.
1334
843a41e8 1335. The default for rfc1413_query_timeout has been changed from 30s to 5s.
4f578862
PH
1336
1337. It is possible to use setclassresources() on some BSD OS to control the
1338 resources used in pipe deliveries.
1339
1340. A new ACL modifier called add_header, which can be used with any verb.
1341
1342. More errors are detectable in retry rules.
1343
1344There are a number of other additions too.
71fafd95 1345
7e66e54d 1346
425ae40f 1347Version 4.60
b5aea5e1
PH
1348------------
1349
425ae40f
PH
1350The documentation is up-to-date for the 4.60 release. Major new features since
1351the 4.50 release are:
1a46a8c5 1352
425ae40f 1353. Support for SQLite.
1a46a8c5 1354
425ae40f 1355. Support for IGNOREQUOTA in LMTP.
1a46a8c5 1356
425ae40f 1357. Extensions to the "submission mode" features.
1a46a8c5 1358
425ae40f 1359. Support for Client SMTP Authorization (CSA).
1a46a8c5 1360
425ae40f 1361. Support for ratelimiting hosts and users.
b5aea5e1 1362
425ae40f 1363. New expansion items to help with the BATV "prvs" scheme.
b5aea5e1 1364
425ae40f 1365. A "match_ip" condition, that matches an IP address against a list.
35edf2ff 1366
425ae40f 1367There are many more minor changes.
495ae4b0
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1368
1369****