dsearch: filter-matches 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.
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5112. Options on the dsearch lookup, to return the full path and to filter
52 filetypes for matching.
298849d8 53
9438970c 54
5b195d6b 55
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56Version 4.93
57------------
58
b53c265b 59 1. An "external" authenticator, per RFC 4422 Appendix A.
40ed89b3 60
7f69e814 61 2. A JSON lookup type, and JSON variants of the forall/any expansion conditions.
40ed89b3 62
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63 3. Variables $tls_in_cipher_std, $tls_out_cipher_std giving the RFC names
64 for ciphersuites.
65
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66 4. Log_selectors "msg_id" (on by default) and "msg_id_created".
67
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68 5. A case_insensitive option for verify=not_blind.
69
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70 6. EXPERIMENTAL_TLS_RESUME optional build feature. See the experimental.spec
71 file.
72
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73 7. A main option exim_version to override the version Exim
74 reports in verious places ($exim_version, $version_number).
75
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76 8. Expansion operator ${sha2_N:} for N=256, 384, 512.
77
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78 9. Router variables, $r_... settable from router options and usable in routers
79 and transports.
80
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8110. The spf lookup now supports IPv6.
82
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8311. Main options for DKIM verify to filter hash and key types.
84
86ede124 8512. With TLS1.3, support for full-chain OCSP stapling.
e326959e 86
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8713. Dual-certificate stacks on servers now support OCSP stapling, under OpenSSL.
88
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8914: An smtp:ehlo transport event, for observability of the remote offered features.
90
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9115: Support under OpenSSL for writing NSS-style key files for packet-capture
92 decode. The environment variable SSLKEYLOGFILE is used; if an absolute path
93 it must indicate a file under the spool directory; if relative the the spool
94 directory is prepended. Works on the server side only. Support under
95 GnuTLS was already there, being done purely by the library (server side
96 only, and exim must be run as root).
97
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9816: Command-line option to move messages from one named queue to another.
99
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10017. Variables $tls_in_ver, $tls_out_ver.
101
049782c0 102
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103Version 4.92
104--------------
105
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106 1. ${l_header:<name>} and ${l_h:<name>} expansion items, giving a colon-sep
107 list when there are multiple headers having a given name. This matters
108 when individual headers are wrapped onto multiple lines; with previous
109 facilities hard to parse.
110
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111 2. The ${readsocket } expansion item now takes a "tls" option, doing the
112 obvious thing.
113
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114 3. EXPERIMENTAL_REQUIRETLS and EXPERIMENTAL_PIPE_CONNECT optional build
115 features. See the experimental.spec file.
8ac90765 116
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117 4. If built with SUPPORT_I18N a "utf8_downconvert" option on the smtp transport.
118
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119 5. A "pipelining" log_selector.
120
8442641e 121 6. Builtin macros for supported log_selector and openssl_options values.
12263aa8 122
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123 7. JSON variants of the ${extract } expansion item.
124
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125 8. A "noutf8" debug option, for disabling the UTF-8 characters in debug output.
126
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127 9. TCP Fast Open support on MacOS.
128
d4fd1b83 129Version 4.91
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130--------------
131
132 1. Dual-certificate stacks on servers now support OCSP stapling, under GnuTLS
133 version 3.5.6 or later.
134
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135 2. DANE is now supported under GnuTLS version 3.0.0 or later. Both GnuTLS and
136 OpenSSL versions are moved to mainline support from Experimental.
405074ad 137 New SMTP transport option "dane_require_tls_ciphers".
899b8bbc 138
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139 3. Feature macros for the compiled-in set of malware scanner interfaces.
140
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141 4. SPF support is promoted from Experimental to mainline status. The template
142 src/EDITME makefile does not enable its inclusion.
143
306c6c77 144 5. Logging control for DKIM verification. The existing DKIM log line is
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145 controlled by a "dkim_verbose" selector which is _not_ enabled by default.
146 A new tag "DKIM=<domain>" is added to <= lines by default, controlled by
147 a "dkim" log_selector.
148
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149 6. Receive duration on <= lines, under a new log_selector "receive_time".
150
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151 7. Options "ipv4_only" and "ipv4_prefer" on the dnslookup router and on
152 routing rules in the manualroute router.
153
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154 8. Expansion item ${sha3:<string>} / ${sha3_<N>:<string>} now also supported
155 under OpenSSL version 1.1.1 or later.
156
286b9d5f 157 9. DKIM operations can now use the Ed25519 algorithm in addition to RSA, under
cb78c1a8 158 GnuTLS 3.6.0 or OpenSSL 1.1.1 or later.
286b9d5f 159
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16010. Builtin feature-macros _CRYPTO_HASH_SHA3 and _CRYPTO_SIGN_ED25519, library
161 version dependent.
162
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16311. "exim -bP macro <name>" returns caller-usable status.
164
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16512. Expansion item ${authresults {<machine>}} for creating an
166 Authentication-Results: header.
167
617d3932 16813. EXPERIMENTAL_ARC. See the experimental.spec file.
ddd16464 169 See also new util/renew-opendmarc-tlds.sh script for use with DMARC/ARC.
617d3932 170
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17114: A dane:fail event, intended to facilitate reporting.
172
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17315. "Lightweight" support for Redis Cluster. Requires redis_servers list to
174 contain all the servers in the cluster, all of which must be reachable from
175 the running exim instance. If the cluster has master/slave replication, the
176 list must contain all the master and slave servers.
177
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17816. Add an option to the Avast scanner interface: "pass_unscanned". This
179 allows to treat unscanned files as clean. Files may be unscanned for
180 several reasons: decompression bombs, broken archives.
181
47195144 182
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183Version 4.90
184------------
185
186 1. PKG_CONFIG_PATH can now be set in Local/Makefile;
187 wildcards will be expanded, values are collapsed.
188
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189 2. The ${readsocket } expansion now takes an option to not shutdown the
190 connection after sending the query string. The default remains to do so.
191
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192 3. An smtp transport option "hosts_noproxy_tls" to control whether multiple
193 deliveries on a single TCP connection can maintain a TLS connection
194 open. By default disabled for all hosts, doing so saves the cost of
195 making new TLS sessions, at the cost of having to proxy the data via
196 another process. Logging is also affected.
197
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198 4. A malware connection type for the FPSCAND protocol.
199
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200 5. An option for recipient verify callouts to hold the connection open for
201 further recipients and for delivery.
202
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203 6. The reproducible build $SOURCE_DATE_EPOCH environment variable is now
204 supported.
205
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206 7. Optionally, an alternate format for spool data-files which matches the
207 wire format - meaning more efficient reception and transmission (at the
208 cost of difficulty with standard Unix tools). Only used for messages
209 received using the ESMTP CHUNKING option, and when a new main-section
210 option "spool_wireformat" (false by default) is set.
211
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212 8. New main configuration option "commandline_checks_require_admin" to
213 restrict who can use various introspection options.
214
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215 9. New option modifier "no_check" for quota and quota_filecount
216 appendfile transport.
217
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21810. Variable $smtp_command_history returning a comma-sep list of recent
219 SMTP commands.
220
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22111. Millisecond timetamps in logs, on log_selector "millisec". Also affects
222 log elements QT, DT and D, and timstamps in debug output.
571b2715 223
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22412. TCP Fast Open logging. As a server, logs when the SMTP banner was sent
225 while still in SYN_RECV state; as a client logs when the connection
4a5cbaff 226 is opened with a TFO cookie.
a2673768 227
9e70917d 22813. DKIM support for multiple signing, by domain and/or key-selector.
7c6ec81b 229 DKIM support for multiple hashes, and for alternate-identity tags.
970424a5 230 Builtin macro with default list of signed headers.
484cc1a9 231 Better syntax for specifying oversigning.
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232 The DKIM ACL can override verification status, and status is visible in
233 the data ACL.
d73e45df 234
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23514. Exipick understands -C|--config for an alternative Exim
236 configuration file.
237
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23815. TCP Fast Open used, with data-on-SYN, for client SMTP via SOCKS5 proxy,
239 for ${readsocket } expansions, and for ClamAV.
240
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24116. The "-be" expansion test mode now supports macros. Macros are expanded
242 in test lines, and new macros can be defined.
243
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24417. Support for server-side dual-certificate-stacks (eg. RSA + ECDSA).
245
856d1e16 246
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247Version 4.89
248------------
249
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250 1. Allow relative config file names for ".include"
251
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252 2. A main-section config option "debug_store" to control the checks on
253 variable locations during store-reset. Normally false but can be enabled
12e9bb25 254 when a memory corruption issue is suspected on a production system.
64073d9c 255
fd047340 256
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257Version 4.88
258------------
259
fc16abb4 260 1. The new perl_taintmode option allows to run the embedded perl
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261 interpreter in taint mode.
262
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263 2. New log_selector: dnssec, adds a "DS" tag to acceptance and delivery lines.
264
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265 3. Speculative debugging, via a "kill" option to the "control=debug" ACL
266 modifier.
267
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268 4. New expansion item ${sha3:<string>} / ${sha3_<N>:<string>}.
269 N can be 224, 256 (default), 384, 512.
270 With GnuTLS 3.5.0 or later, only.
271
f59aaaaa 272 5. Facility for named queues: A command-line argument can specify
55e70e76 273 the queue name for a queue operation, and an ACL modifier can set
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274 the queue to be used for a message. A $queue_name variable gives
275 visibility.
28b3821f 276
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277 6. New expansion operators base32/base32d.
278
44bc8f0c 279 7. The CHUNKING ESMTP extension from RFC 3030. May give some slight
7e3ce68e 280 performance increase and network load decrease. Main config option
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281 chunking_advertise_hosts, and smtp transport option hosts_try_chunking
282 for control.
7e3ce68e 283
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284 8. LMDB lookup support, as Experimental. Patch supplied by Andrew Colin Kissa.
285
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286 9. Expansion operator escape8bit, like escape but not touching newline etc..
287
fbbd45ff 28810. Feature macros, generated from compile options. All start with "_HAVE_"
4945f557 289 and go on with some roughly recognisable name. Driver macros, for
383832ef 290 router, transport and authentication drivers; names starting with "_DRIVER_".
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291 Option macros, for each configuration-file option; all start with "_OPT_".
292 Use the "-bP macros" command-line option to see what is present.
fbbd45ff 293
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29411. Integer values for options can take a "G" multiplier.
295
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29612. defer=pass option for the ACL control cutthrough_delivery, to reflect 4xx
297 returns from the target back to the initiator, rather than spooling the
298 message.
299
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30013. New built-in constants available for tls_dhparam and default changed.
301
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30214. If built with EXPERIMENTAL_QUEUEFILE, a queuefile transport, for writing
303 out copies of the message spool files for use by 3rd-party scanners.
304
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30515. A new option on the smtp transport, hosts_try_fastopen. If the system
306 supports it (on Linux it must be enabled in the kernel by the sysadmin)
307 try to use RFC 7413 "TCP Fast Open". No data is sent on the SYN segment
308 but it permits a peer that also supports the facility to send its SMTP
309 banner immediately after the SYN,ACK segment rather then waiting for
310 another ACK - so saving up to one roundtrip time. Because it requires
311 previous communication with the peer (we save a cookie from it) this
f59aaaaa 312 will only become active on frequently-contacted destinations.
fb05276a 313
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31416. A new syslog_pid option to suppress PID duplication in syslog lines.
315
8d042305 316
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317Version 4.87
318------------
319
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320 1. The ACL conditions regex and mime_regex now capture substrings
321 into numeric variables $regex1 to 9, like the "match" expansion condition.
322
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323 2. New $callout_address variable records the address used for a spam=,
324 malware= or verify= callout.
325
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326 3. Transports now take a "max_parallel" option, to limit concurrency.
327
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328 4. Expansion operators ${ipv6norm:<string>} and ${ipv6denorm:<string>}.
329 The latter expands to a 8-element colon-sep set of hex digits including
330 leading zeroes. A trailing ipv4-style dotted-decimal set is converted
331 to hex. Pure ipv4 addresses are converted to IPv4-mapped IPv6.
332 The former operator strips leading zeroes and collapses the longest
333 set of 0-groups to a double-colon.
334
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335 5. New "-bP config" support, to dump the effective configuration.
336
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337 6. New $dkim_key_length variable.
338
9aa35e9c 339 7. New base64d and base64 expansion items (the existing str2b64 being a
59b87190 340 synonym of the latter). Add support in base64 for certificates.
9aa35e9c 341
62b7cd08 342 8. New main configuration option "bounce_return_linesize_limit" to
f59aaaaa 343 avoid oversize bodies in bounces. The default value matches RFC
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344 limits.
345
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346 9. New $initial_cwd expansion variable.
347
0d9b78be 348
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349Version 4.86
350------------
351
352 1. Support for using the system standard CA bundle.
353
354 2. New expansion items $config_file, $config_dir, containing the file
355 and directory name of the main configuration file. Also $exim_version.
356
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357 3. New "malware=" support for Avast.
358
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359 4. New "spam=" variant option for Rspamd.
360
361 5. Assorted options on malware= and spam= scanners.
362
f59aaaaa 363 6. A command-line option to write a comment into the logfile.
cc00f4af 364
7eb6c37c 365 7. If built with EXPERIMENTAL_SOCKS feature enabled, the smtp transport can
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366 be configured to make connections via socks5 proxies.
367
368 8. If built with EXPERIMENTAL_INTERNATIONAL, support is included for
369 the transmission of UTF-8 envelope addresses.
7eb6c37c 370
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371 9. If built with EXPERIMENTAL_INTERNATIONAL, an expansion item for a commonly
372 used encoding of Maildir folder names.
373
b3ef41c9 37410. A logging option for slow DNS lookups.
846430d9 375
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37611. New ${env {<variable>}} expansion.
377
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37812. A non-SMTP authenticator using information from TLS client certificates.
379
10ca4f1c 38013. Main option "tls_eccurve" for selecting an Elliptic Curve for TLS.
65463bc9 381 Patch originally by Wolfgang Breyha.
10ca4f1c 382
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38314. Main option "dns_trust_aa" for trusting your local nameserver at the
384 same level as DNSSEC.
385
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386Version 4.85
387------------
388
389 1. If built with EXPERIMENTAL_DANE feature enabled, Exim will follow the
f59aaaaa 390 DANE SMTP draft to assess a secure chain of trust of the certificate
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391 used to establish the TLS connection based on a TLSA record in the
392 domain of the sender.
393
394 2. The EXPERIMENTAL_TPDA feature has been renamed to EXPERIMENTAL_EVENT
395 and several new events have been created. The reason is because it has
396 been expanded beyond just firing events during the transport phase. Any
397 existing TPDA transport options will have to be rewritten to use a new
398 $event_name expansion variable in a condition. Refer to the
399 experimental-spec.txt for details and examples.
400
401 3. The EXPERIMENTAL_CERTNAMES features is an enhancement to verify that
402 server certs used for TLS match the result of the MX lookup. It does
403 not use the same mechanism as DANE.
404
405
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406Version 4.84
407------------
408
409
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410Version 4.83
411------------
412
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413 1. If built with the EXPERIMENTAL_PROXY feature enabled, Exim can be
414 configured to expect an initial header from a proxy that will make the
415 actual external source IP:host be used in exim instead of the IP of the
416 proxy that is connecting to it.
417
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418 2. New verify option header_names_ascii, which will check to make sure
419 there are no non-ASCII characters in header names. Exim itself handles
420 those non-ASCII characters, but downstream apps may not, so Exim can
421 detect and reject if those characters are present.
422
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423 3. New expansion operator ${utf8clean:string} to replace malformed UTF8
424 codepoints with valid ones.
425
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426 4. New malware type "sock". Talks over a Unix or TCP socket, sending one
427 command line and matching a regex against the return data for trigger
007a2dee 428 and a second regex to extract malware_name. The mail spoolfile name can
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429 be included in the command line.
430
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431 5. The smtp transport now supports options "tls_verify_hosts" and
432 "tls_try_verify_hosts". If either is set the certificate verification
433 is split from the encryption operation. The default remains that a failed
434 verification cancels the encryption.
214042d2 435
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436 6. New SERVERS override of default ldap server list. In the ACLs, an ldap
437 lookup can now set a list of servers to use that is different from the
438 default list.
439
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440 7. New command-line option -C for exiqgrep to specify alternate exim.conf
441 file when searching the queue.
442
f2de3a33 443 8. OCSP now supports GnuTLS also, if you have version 3.1.3 or later of that.
2b4a568d 444
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445 9. Support for DNSSEC on outbound connections.
446
9d1c15ef 44710. New variables "tls_(in,out)_(our,peer)cert" and expansion item
6a8a60e0 448 "certextract" to extract fields from them. Hash operators md5 and sha1
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449 work over them for generating fingerprints, and a new sha256 operator
450 for them added.
9d1c15ef 451
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45211. PRDR is now supported dy default.
453
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45412. OCSP stapling is now supported by default.
455
45613. If built with the EXPERIMENTAL_DSN feature enabled, Exim will output
4c04137d 457 Delivery Status Notification messages in MIME format, and negotiate
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458 DSN features per RFC 3461.
459
6ece2e77 460
2c422e6f 461Version 4.82
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462------------
463
464 1. New command-line option -bI:sieve will list all supported sieve extensions
465 of this Exim build on standard output, one per line.
466 ManageSieve (RFC 5804) providers managing scripts for use by Exim should
467 query this to establish the correct list to include in the protocol's
468 SIEVE capability line.
469
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470 2. If the -n option is combined with the -bP option, then the name of an
471 emitted option is not output, only the value (if visible to you).
472 For instance, "exim -n -bP pid_file_path" should just emit a pathname
473 followed by a newline, and no other text.
474
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475 3. When built with SUPPORT_TLS and USE_GNUTLS, the SMTP transport driver now
476 has a "tls_dh_min_bits" option, to set the minimum acceptable number of
477 bits in the Diffie-Hellman prime offered by a server (in DH ciphersuites)
478 acceptable for security. (Option accepted but ignored if using OpenSSL).
479 Defaults to 1024, the old value. May be lowered only to 512, or raised as
480 far as you like. Raising this may hinder TLS interoperability with other
481 sites and is not currently recommended. Lowering this will permit you to
482 establish a TLS session which is not as secure as you might like.
483
484 Unless you really know what you are doing, leave it alone.
485
1f4a55da 486 4. If not built with DISABLE_DNSSEC, Exim now has the main option
0fbd9bff 487 dns_dnssec_ok; if set to 1 then Exim will initialise the resolver library
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488 to send the DO flag to your recursive resolver. If you have a recursive
489 resolver, which can set the Authenticated Data (AD) flag in results, Exim
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490 can now detect this. Exim does not perform validation itself, instead
491 relying upon a trusted path to the resolver.
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492
493 Current status: work-in-progress; $sender_host_dnssec variable added.
494
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495 5. DSCP support for outbound connections: on a transport using the smtp driver,
496 set "dscp = ef", for instance, to cause the connections to have the relevant
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497 DSCP (IPv4 TOS or IPv6 TCLASS) value in the header.
498
499 Similarly for inbound connections, there is a new control modifier, dscp,
500 so "warn control = dscp/ef" in the connect ACL, or after authentication.
501
502 Supported values depend upon system libraries. "exim -bI:dscp" to list the
503 ones Exim knows of. You can also set a raw number 0..0x3F.
36a3ae5f 504
f4ee74ac
PP
505 6. The -G command-line flag is no longer ignored; it is now equivalent to an
506 ACL setting "control = suppress_local_fixups". The -L command-line flag
507 is now accepted and forces use of syslog, with the provided tag as the
508 process name. A few other flags used by Sendmail are now accepted and
509 ignored.
510
976b7e9f 511 7. New cutthrough routing feature. Requested by a "control = cutthrough_delivery"
4c04137d 512 ACL modifier; works for single-recipient mails which are received on and
976b7e9f
JH
513 deliverable via SMTP. Using the connection made for a recipient verify,
514 if requested before the verify, or a new one made for the purpose while
515 the inbound connection is still active. The bulk of the mail item is copied
516 direct from the inbound socket to the outbound (as well as the spool file).
517 When the source notifies the end of data, the data acceptance by the destination
4c04137d 518 is negotiated before the acceptance is sent to the source. If the destination
976b7e9f
JH
519 does not accept the mail item, for example due to content-scanning, the item
520 is not accepted from the source and therefore there is no need to generate
521 a bounce mail. This is of benefit when providing a secondary-MX service.
522 The downside is that delays are under the control of the ultimate destination
523 system not your own.
524
4c04137d 525 The Received-by: header on items delivered by cutthrough is generated
042eb971 526 early in reception rather than at the end; this will affect any timestamp
976b7e9f
JH
527 included. The log line showing delivery is recorded before that showing
528 reception; it uses a new ">>" tag instead of "=>".
06a6f4ed 529
976b7e9f
JH
530 To support the feature, verify-callout connections can now use ESMTP and TLS.
531 The usual smtp transport options are honoured, plus a (new, default everything)
532 hosts_verify_avoid_tls.
533
534 New variable families named tls_in_cipher, tls_out_cipher etc. are introduced
535 for specific access to the information for each connection. The old names
536 are present for now but deprecated.
537
fcc8e047 538 Not yet supported: IGNOREQUOTA, SIZE, PIPELINING.
976b7e9f 539
a64a3dfa
JH
540 8. New expansion operators ${listnamed:name} to get the content of a named list
541 and ${listcount:string} to count the items in a list.
98a90c36 542
2519e60d 543 9. New global option "gnutls_allow_auto_pkcs11", defaults false. The GnuTLS
a5f239e4
PP
544 rewrite in 4.80 combines with GnuTLS 2.12.0 or later, to autoload PKCS11
545 modules. For some situations this is desirable, but we expect admin in
546 those situations to know they want the feature. More commonly, it means
547 that GUI user modules get loaded and are broken by the setuid Exim being
548 unable to access files specified in environment variables and passed
549 through, thus breakage. So we explicitly inhibit the PKCS11 initialisation
550 unless this new option is set.
551
2519e60d
TL
552 Some older OS's with earlier versions of GnuTLS might not have pkcs11 ability,
553 so have also added a build option which can be used to build Exim with GnuTLS
554 but without trying to use any kind of PKCS11 support. Uncomment this in the
555 Local/Makefile:
556
557 AVOID_GNUTLS_PKCS11=yes
558
3e8abda0 55910. The "acl = name" condition on an ACL now supports optional arguments.
bef3ea7f
JH
560 New expansion item "${acl {name}{arg}...}" and expansion condition
561 "acl {{name}{arg}...}" are added. In all cases up to nine arguments
562 can be used, appearing in $acl_arg1 to $acl_arg9 for the called ACL.
563 Variable $acl_narg contains the number of arguments. If the ACL sets
564 a "message =" value this becomes the result of the expansion item,
565 or the value of $value for the expansion condition. If the ACL returns
566 accept the expansion condition is true; if reject, false. A defer
567 return results in a forced fail.
a5f239e4 568
846726c5
JH
56911. Routers and transports can now have multiple headers_add and headers_remove
570 option lines. The concatenated list is used.
571
e7568d51
TL
57212. New ACL modifier "remove_header" can remove headers before message gets
573 handled by routers/transports.
574
3a796370
JH
57513. New dnsdb lookup pseudo-type "a+". A sequence of "a6" (if configured),
576 "aaaa" and "a" lookups is done and the full set of results returned.
577
362145b5 57814. New expansion variable $headers_added with content from ACL add_header
85ffcba6 579 modifier (but not yet added to message).
362145b5 580
bd0fff00 58115. New 8bitmime status logging option for received messages. Log field "M8S".
3c0a92dc 582
c8e2fc1e
JH
58316. New authenticated_sender logging option, adding to log field "A".
584
181d9bf8 58517. New expansion variables $router_name and $transport_name. Useful
f59aaaaa 586 particularly for debug_print as -bt command-line option does not
2a47f028 587 require privilege whereas -d does.
181d9bf8 588
fd98a5c6
JH
58918. If built with EXPERIMENTAL_PRDR, per-recipient data responses per a
590 proposed extension to SMTP from Eric Hall.
591
700d22f3
PP
59219. The pipe transport has gained the force_command option, to allow
593 decorating commands from user .forward pipe aliases with prefix
594 wrappers, for instance.
595
fcc8e047
JH
59620. Callout connections can now AUTH; the same controls as normal delivery
597 connections apply.
598
b1f37849
TL
59921. Support for DMARC, using opendmarc libs, can be enabled. It adds new
600 options: dmarc_forensic_sender, dmarc_history_file, and dmarc_tld_file.
601 It adds new expansion variables $dmarc_ar_header, $dmarc_status,
602 $dmarc_status_text, and $dmarc_used_domain. It adds a new acl modifier
603 dmarc_status. It adds new control flags dmarc_disable_verify and
687cac44
HSHR
604 dmarc_enable_forensic. The default for the dmarc_tld_file option is
605 "/etc/exim/opendmarc.tlds" and can be changed via EDITME.
b1f37849
TL
606
60722. Add expansion variable $authenticated_fail_id, which is the username
608 provided to the authentication method which failed. It is available
609 for use in subsequent ACL processing (typically quit or notquit ACLs).
610
4c04137d 61123. New ACL modifier "udpsend" can construct a UDP packet to send to a given
7142daca
PP
612 UDP host and port.
613
61424. New ${hexquote:..string..} expansion operator converts non-printable
615 characters in the string to \xNN form.
616
1a7b746d
TL
61725. Experimental TPDA (Transport Post Delivery Action) function added.
618 Patch provided by Axel Rau.
619
4dd78911
TL
62026. Experimental Redis lookup added. Patch provided by Warren Baker.
621
181d9bf8 622
b1770b6e 623Version 4.80
c1e794ba
PP
624------------
625
626 1. New authenticator driver, "gsasl". Server-only (at present).
627 This is a SASL interface, licensed under GPL, which can be found at
628 http://www.gnu.org/software/gsasl/.
629 This system does not provide sources of data for authentication, so
3b4f55a3 630 careful use needs to be made of the conditions in Exim.
c1e794ba 631
97753960
PP
632 2. New authenticator driver, "heimdal_gssapi". Server-only.
633 A replacement for using cyrus_sasl with Heimdal, now that $KRB5_KTNAME
634 is no longer honoured for setuid programs by Heimdal. Use the
635 "server_keytab" option to point to the keytab.
636
252e0c7b
PP
637 3. The "pkg-config" system can now be used when building Exim to reference
638 cflags and library information for lookups and authenticators, rather
639 than having to update "CFLAGS", "AUTH_LIBS", "LOOKUP_INCLUDE" and
7e6a8985
PP
640 "LOOKUP_LIBS" directly. Similarly for handling the TLS library support
641 without adjusting "TLS_INCLUDE" and "TLS_LIBS".
252e0c7b 642
6a6084f8
PP
643 In addition, setting PCRE_CONFIG=yes will query the pcre-config tool to
644 find the headers and libraries for PCRE.
645
f1e05cc7 646 4. New expansion variable $tls_bits.
20aa9dbd 647
4a6a987a
PP
648 5. New lookup type, "dbmjz". Key is an Exim list, the elements of which will
649 be joined together with ASCII NUL characters to construct the key to pass
3b4f55a3
PP
650 into the DBM library. Can be used with gsasl to access sasldb2 files as
651 used by Cyrus SASL.
4a6a987a 652
da3ad30d
PP
653 6. OpenSSL now supports TLS1.1 and TLS1.2 with OpenSSL 1.0.1.
654
655 Avoid release 1.0.1a if you can. Note that the default value of
656 "openssl_options" is no longer "+dont_insert_empty_fragments", as that
657 increased susceptibility to attack. This may still have interoperability
658 implications for very old clients (see version 4.31 change 37) but
659 administrators can choose to make the trade-off themselves and restore
660 compatibility at the cost of session security.
661
7be682ca
PP
662 7. Use of the new expansion variable $tls_sni in the main configuration option
663 tls_certificate will cause Exim to re-expand the option, if the client
664 sends the TLS Server Name Indication extension, to permit choosing a
665 different certificate; tls_privatekey will also be re-expanded. You must
666 still set these options to expand to valid files when $tls_sni is not set.
3f0945ff
PP
667
668 The SMTP Transport has gained the option tls_sni, which will set a hostname
669 for outbound TLS sessions, and set $tls_sni too.
670
671 A new log_selector, +tls_sni, has been added, to log received SNI values
672 for Exim as a server.
673
9cbad13b
PP
674 8. The existing "accept_8bitmime" option now defaults to true. This means
675 that Exim is deliberately not strictly RFC compliant. We're following
676 Dan Bernstein's advice in http://cr.yp.to/smtp/8bitmime.html by default.
677 Those who disagree, or know that they are talking to mail servers that,
678 even today, are not 8-bit clean, need to turn off this option.
679
9ee44efb
PP
680 9. Exim can now be started with -bw (with an optional timeout, given as
681 -bw<timespec>). With this, stdin at startup is a socket that is
682 already listening for connections. This has a more modern name of
683 "socket activation", but forcing the activated socket to fd 0. We're
684 interested in adding more support for modern variants.
685
eae0036b 68610. ${eval } now uses 64-bit values on supporting platforms. A new "G" suffix
97d17305
JH
687 for numbers indicates multiplication by 1024^3.
688
17c76198
PP
68911. The GnuTLS support has been revamped; the three options gnutls_require_kx,
690 gnutls_require_mac & gnutls_require_protocols are no longer supported.
691 tls_require_ciphers is now parsed by gnutls_priority_init(3) as a priority
692 string, documentation for which is at:
42bfef1e 693 http://www.gnutls.org/manual/html_node/Priority-Strings.html
17c76198
PP
694
695 SNI support has been added to Exim's GnuTLS integration too.
696
af3498d6
PP
697 For sufficiently recent GnuTLS libraries, ${randint:..} will now use
698 gnutls_rnd(), asking for GNUTLS_RND_NONCE level randomness.
699
53947857 70012. With OpenSSL, if built with EXPERIMENTAL_OCSP, a new option tls_ocsp_file
3f7eeb86
PP
701 is now available. If the contents of the file are valid, then Exim will
702 send that back in response to a TLS status request; this is OCSP Stapling.
703 Exim will not maintain the contents of the file in any way: administrators
704 are responsible for ensuring that it is up-to-date.
705
706 See "experimental-spec.txt" for more details.
707
eae0036b
PP
70813. ${lookup dnsdb{ }} supports now SPF record types. They are handled
709 identically to TXT record lookups.
710
2605c55b 71114. New expansion variable $tod_epoch_l for higher-precision time.
c1e794ba 712
3375e053
PP
71315. New global option tls_dh_max_bits, defaulting to current value of NSS
714 hard-coded limit of DH ephemeral bits, to fix interop problems caused by
715 GnuTLS 2.12 library recommending a bit count higher than NSS supports.
716
a799883d
PP
71716. tls_dhparam now used by both OpenSSL and GnuTLS, can be path or identifier.
718 Option can now be a path or an identifier for a standard prime.
719 If unset, we use the DH prime from section 2.2 of RFC 5114, "ike23".
720 Set to "historic" to get the old GnuTLS behaviour of auto-generated DH
721 primes.
722
3ecab157 72317. SSLv2 now disabled by default in OpenSSL. (Never supported by GnuTLS).
f0f5a555
PP
724 Use "openssl_options -no_sslv2" to re-enable support, if your OpenSSL
725 install was not built with OPENSSL_NO_SSL2 ("no-ssl2").
726
9e45c72b 727
3ce96ada
TF
728Version 4.77
729------------
730
731 1. New options for the ratelimit ACL condition: /count= and /unique=.
732 The /noupdate option has been replaced by a /readonly option.
733
061b7ebd
PP
734 2. The SMTP transport's protocol option may now be set to "smtps", to
735 use SSL-on-connect outbound.
736
9e949f00
PP
737 3. New variable $av_failed, set true if the AV scanner deferred; ie, when
738 there is a problem talking to the AV scanner, or the AV scanner running.
739
39257585
PP
740 4. New expansion conditions, "inlist" and "inlisti", which take simple lists
741 and check if the search item is a member of the list. This does not
742 support named lists, but does subject the list part to string expansion.
743
744 5. Unless the new EXPAND_LISTMATCH_RHS build option is set when Exim was
745 built, Exim no longer performs string expansion on the second string of
746 the match_* expansion conditions: "match_address", "match_domain",
747 "match_ip" & "match_local_part". Named lists can still be used.
748
7c6d71af 749
e97d1f08
PP
750Version 4.76
751------------
752
753 1. The global option "dns_use_edns0" may be set to coerce EDNS0 usage on
754 or off in the resolver library.
755
756
bc19a55b
PP
757Version 4.75
758------------
759
760 1. In addition to the existing LDAP and LDAP/SSL ("ldaps") support, there
761 is now LDAP/TLS support, given sufficiently modern OpenLDAP client
762 libraries. The following global options have been added in support of
763 this: ldap_ca_cert_dir, ldap_ca_cert_file, ldap_cert_file, ldap_cert_key,
764 ldap_cipher_suite, ldap_require_cert, ldap_start_tls.
765
2fe76745
PP
766 2. The pipe transport now takes a boolean option, "freeze_signal", default
767 false. When true, if the external delivery command exits on a signal then
768 Exim will freeze the message in the queue, instead of generating a bounce.
769
f1e5fef5
PP
770 3. Log filenames may now use %M as an escape, instead of %D (still available).
771 The %M pattern expands to yyyymm, providing month-level resolution.
772
332f5cf3
PP
773 4. The $message_linecount variable is now updated for the maildir_tag option,
774 in the same way as $message_size, to reflect the real number of lines,
775 including any header additions or removals from transport.
776
29cfeb94
PP
777 5. When contacting a pool of SpamAssassin servers configured in spamd_address,
778 Exim now selects entries randomly, to better scale in a cluster setup.
779
bc19a55b 780
a01ba081
PP
781Version 4.74
782------------
783
1670ef10
PP
784 1. SECURITY FIX: privilege escalation flaw fixed. On Linux (and only Linux)
785 the flaw permitted the Exim run-time user to cause root to append to
786 arbitrary files of the attacker's choosing, with the content based
787 on content supplied by the attacker.
788
789 2. Exim now supports loading some lookup types at run-time, using your
a01ba081
PP
790 platform's dlopen() functionality. This has limited platform support
791 and the intention is not to support every variant, it's limited to
792 dlopen(). This permits the main Exim binary to not be linked against
793 all the libraries needed for all the lookup types.
794
795
77bb000f
PP
796Version 4.73
797------------
798
2cfd3221
PP
799 NOTE: this version is not guaranteed backwards-compatible, please read the
800 items below carefully
801
77bb000f
PP
802 1. A new main configuration option, "openssl_options", is available if Exim
803 is built with SSL support provided by OpenSSL. The option allows
804 administrators to specify OpenSSL options to be used on connections;
805 typically this is to set bug compatibility features which the OpenSSL
806 developers have not enabled by default. There may be security
807 consequences for certain options, so these should not be changed
808 frivolously.
809
a29e5231
PP
810 2. A new pipe transport option, "permit_coredumps", may help with problem
811 diagnosis in some scenarios. Note that Exim is typically installed as
812 a setuid binary, which on most OSes will inhibit coredumps by default,
43236f35 813 so that safety mechanism would have to be overridden for this option to
a29e5231
PP
814 be able to take effect.
815
8544e77a
PP
816 3. ClamAV 0.95 is now required for ClamAV support in Exim, unless
817 Local/Makefile sets: WITH_OLD_CLAMAV_STREAM=yes
818 Note that this switches Exim to use a new API ("INSTREAM") and a future
819 release of ClamAV will remove support for the old API ("STREAM").
820
821 The av_scanner option, when set to "clamd", now takes an optional third
822 part, "local", which causes Exim to pass a filename to ClamAV instead of
823 the file content. This is the same behaviour as when clamd is pointed at
824 a Unix-domain socket. For example:
825
826 av_scanner = clamd:192.0.2.3 1234:local
827
491fab4c
PP
828 ClamAV's ExtendedDetectionInfo response format is now handled.
829
8544e77a
PP
830 4. There is now a -bmalware option, restricted to admin users. This option
831 takes one parameter, a filename, and scans that file with Exim's
832 malware-scanning framework. This is intended purely as a debugging aid
833 to ensure that Exim's scanning is working, not to replace other tools.
a9622bc6
PP
834 Note that the ACL framework is not invoked, so if av_scanner references
835 ACL variables without a fallback then this will fail.
8544e77a 836
83e029d5
PP
837 5. There is a new expansion operator, "reverse_ip", which will reverse IP
838 addresses; IPv4 into dotted quad, IPv6 into dotted nibble. Examples:
839
840 ${reverse_ip:192.0.2.4}
841 -> 4.2.0.192
842 ${reverse_ip:2001:0db8:c42:9:1:abcd:192.0.2.3}
843 -> 3.0.2.0.0.0.0.c.d.c.b.a.1.0.0.0.9.0.0.0.2.4.c.0.8.b.d.0.1.0.0.2
844
ed7f7860
PP
845 6. There is a new ACL control called "debug", to enable debug logging.
846 This allows selective logging of certain incoming transactions within
847 production environments, with some care. It takes two options, "tag"
848 and "opts"; "tag" is included in the filename of the log and "opts"
849 is used as per the -d<options> command-line option. Examples, which
850 don't all make sense in all contexts:
851
852 control = debug
853 control = debug/tag=.$sender_host_address
854 control = debug/opts=+expand+acl
855 control = debug/tag=.$message_exim_id/opts=+expand
856
10385c15
PP
857 7. It has always been implicit in the design and the documentation that
858 "the Exim user" is not root. src/EDITME said that using root was
859 "very strongly discouraged". This is not enough to keep people from
860 shooting themselves in the foot in days when many don't configure Exim
861 themselves but via package build managers. The security consequences of
862 running various bits of network code are severe if there should be bugs in
863 them. As such, the Exim user may no longer be root. If configured
864 statically, Exim will refuse to build. If configured as ref:user then Exim
865 will exit shortly after start-up. If you must shoot yourself in the foot,
866 then henceforth you will have to maintain your own local patches to strip
867 the safeties off.
868
06a6f4ed 869 8. There is a new expansion condition, bool_lax{}. Where bool{} uses the ACL
6a8de854
PP
870 condition logic to determine truth/failure and will fail to expand many
871 strings, bool_lax{} uses the router condition logic, where most strings
872 do evaluate true.
873 Note: bool{00} is false, bool_lax{00} is true.
874
06a6f4ed 875 9. Routers now support multiple "condition" tests.
532be449 876
5dc43717
JJ
87710. There is now a runtime configuration option "tcp_wrappers_daemon_name".
878 Setting this allows an admin to define which entry in the tcpwrappers
879 config file will be used to control access to the daemon. This option
880 is only available when Exim is built with USE_TCP_WRAPPERS. The
881 default value is set at build time using the TCP_WRAPPERS_DAEMON_NAME
882 build option.
883
79d4bc3d
PP
88411. [POSSIBLE CONFIG BREAKAGE] The default value for system_filter_user is now
885 the Exim run-time user, instead of root.
886
2cfd3221
PP
88712. [POSSIBLE CONFIG BREAKAGE] ALT_CONFIG_ROOT_ONLY is no longer optional and
888 is forced on. This is mitigated by the new build option
90b6341f 889 TRUSTED_CONFIG_LIST which defines a list of configuration files which
7f7f0545
DW
890 are trusted; one per line. If a config file is owned by root and matches
891 a pathname in the list, then it may be invoked by the Exim build-time
892 user without Exim relinquishing root privileges.
2cfd3221
PP
893
89413. [POSSIBLE CONFIG BREAKAGE] The Exim user is no longer automatically
895 trusted to supply -D<Macro[=Value]> overrides on the command-line. Going
90b6341f
DW
896 forward, we recommend using TRUSTED_CONFIG_LIST with shim configs that
897 include the main config. As a transition mechanism, we are temporarily
898 providing a work-around: the new build option WHITELIST_D_MACROS provides
43236f35 899 a colon-separated list of macro names which may be overridden by the Exim
90b6341f
DW
900 run-time user. The values of these macros are constrained to the regex
901 ^[A-Za-z0-9_/.-]*$ (which explicitly does allow for empty values).
2cfd3221 902
77bb000f 903
3fc596e4
NM
904Version 4.72
905------------
906
b26eacf1
PP
907 1. TWO SECURITY FIXES: one relating to mail-spools which are globally
908 writable, the other to locking of MBX folders (not mbox).
909
910 2. MySQL stored procedures are now supported.
911
912 3. The dkim_domain transport option is now a list, not a single string, and
913 messages will be signed for each element in the list (discarding
914 duplicates).
915
916 4. The 4.70 release unexpectedly changed the behaviour of dnsdb TXT lookups
917 in the presence of multiple character strings within the RR. Prior to 4.70,
918 only the first string would be returned. The dnsdb lookup now, by default,
919 preserves the pre-4.70 semantics, but also now takes an extended output
8f425947
PP
920 separator specification. The separator can be followed by a semicolon, to
921 concatenate the individual text strings together with no join character,
922 or by a comma and a second separator character, in which case the text
923 strings within a TXT record are joined on that second character.
924 Administrators are reminded that DNS provides no ordering guarantees
925 between multiple records in an RRset. For example:
b26eacf1
PP
926
927 foo.example. IN TXT "a" "b" "c"
928 foo.example. IN TXT "d" "e" "f"
929
930 ${lookup dnsdb{>/ txt=foo.example}} -> "a/d"
931 ${lookup dnsdb{>/; txt=foo.example}} -> "def/abc"
8f425947 932 ${lookup dnsdb{>/,+ txt=foo.example}} -> "a+b+c/d+e+f"
b26eacf1 933
3fc596e4 934
f33253cc
NM
935Version 4.70 / 4.71
936-------------------
65a7d8c3 937
7c6d71af 938 1. Native DKIM support without an external library.
a8c8d6b5
JJ
939 (Note that if no action to prevent it is taken, a straight upgrade will
940 result in DKIM verification of all signed incoming emails. See spec
941 for details on conditionally disabling)
7c6d71af
NM
942
943 2. Experimental DCC support via dccifd (contributed by Wolfgang Breyha).
65a7d8c3 944
f33253cc 945 3. There is now a bool{} expansion condition which maps certain strings to
7d9f747b 946 true/false condition values (most likely of use in conjunction with the
f33253cc
NM
947 and{} expansion operator).
948
949 4. The $spam_score, $spam_bar and $spam_report variables are now available
950 at delivery time.
951
952 5. exim -bP now supports "macros", "macro_list" or "macro MACRO_NAME" as
953 options, provided that Exim is invoked by an admin_user.
954
955 6. There is a new option gnutls_compat_mode, when linked against GnuTLS,
956 which increases compatibility with older clients at the cost of decreased
957 security. Don't set this unless you need to support such clients.
958
959 7. There is a new expansion operator, ${randint:...} which will produce a
960 "random" number less than the supplied integer. This randomness is
961 not guaranteed to be cryptographically strong, but depending upon how
962 Exim was built may be better than the most naive schemes.
963
964 8. Exim now explicitly ensures that SHA256 is available when linked against
965 OpenSSL.
966
967 9. The transport_filter_timeout option now applies to SMTP transports too.
968
65a7d8c3 969
7d9f747b
PP
970Version 4.69
971------------
972
973 1. Preliminary DKIM support in Experimental.
974
975
2b85bce7
PH
976Version 4.68
977------------
978
979 1. The body_linecount and body_zerocount C variables are now exported in the
980 local_scan API.
981
93655c46
PH
982 2. When a dnslists lookup succeeds, the key that was looked up is now placed
983 in $dnslist_matched. When the key is an IP address, it is not reversed in
984 this variable (though it is, of course, in the actual lookup). In simple
985 cases, for example:
986
987 deny dnslists = spamhaus.example
988
989 the key is also available in another variable (in this case,
990 $sender_host_address). In more complicated cases, however, this is not
991 true. For example, using a data lookup might generate a dnslists lookup
992 like this:
993
994 deny dnslists = spamhaus.example/<|192.168.1.2|192.168.6.7|...
995
996 If this condition succeeds, the value in $dnslist_matched might be
997 192.168.6.7 (for example).
998
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999 3. Authenticators now have a client_condition option. When Exim is running as
1000 a client, it skips an authenticator whose client_condition expansion yields
1001 "0", "no", or "false". This can be used, for example, to skip plain text
1002 authenticators when the connection is not encrypted by a setting such as:
1003
1004 client_condition = ${if !eq{$tls_cipher}{}}
1005
1006 Note that the 4.67 documentation states that $tls_cipher contains the
1007 cipher used for incoming messages. In fact, during SMTP delivery, it
1008 contains the cipher used for the delivery. The same is true for
1009 $tls_peerdn.
1010
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1011 4. There is now a -Mvc <message-id> option, which outputs a copy of the
1012 message to the standard output, in RFC 2822 format. The option can be used
1013 only by an admin user.
1014
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1015 5. There is now a /noupdate option for the ratelimit ACL condition. It
1016 computes the rate and checks the limit as normal, but it does not update
1017 the saved data. This means that, in relevant ACLs, it is possible to lookup
1018 the existence of a specified (or auto-generated) ratelimit key without
1019 incrementing the ratelimit counter for that key.
1020
1021 In order for this to be useful, another ACL entry must set the rate
1022 for the same key somewhere (otherwise it will always be zero).
1023
1024 Example:
1025
1026 acl_check_connect:
1027 # Read the rate; if it doesn't exist or is below the maximum
1028 # we update it below
1029 deny ratelimit = 100 / 5m / strict / noupdate
1030 log_message = RATE: $sender_rate / $sender_rate_period \
1031 (max $sender_rate_limit)
1032
1033 [... some other logic and tests...]
1034
1035 warn ratelimit = 100 / 5m / strict / per_cmd
1036 log_message = RATE UPDATE: $sender_rate / $sender_rate_period \
1037 (max $sender_rate_limit)
1038 condition = ${if le{$sender_rate}{$sender_rate_limit}}
1039
1040 accept
1041
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1042 6. The variable $max_received_linelength contains the number of bytes in the
1043 longest line that was received as part of the message, not counting the
1044 line termination character(s).
1045
aded2255 1046 7. Host lists can now include +ignore_defer and +include_defer, analogous to
d52120f2
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1047 +ignore_unknown and +include_unknown. These options should be used with
1048 care, probably only in non-critical host lists such as whitelists.
1049
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1050 8. There's a new option called queue_only_load_latch, which defaults true.
1051 If set false when queue_only_load is greater than zero, Exim re-evaluates
1052 the load for each incoming message in an SMTP session. Otherwise, once one
1053 message is queued, the remainder are also.
1054
4f054c63 1055 9. There is a new ACL, specified by acl_smtp_notquit, which is run in most
8f128379
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1056 cases when an SMTP session ends without sending QUIT. However, when Exim
1057 itself is is bad trouble, such as being unable to write to its log files,
1058 this ACL is not run, because it might try to do things (such as write to
1059 log files) that make the situation even worse.
1060
1061 Like the QUIT ACL, this new ACL is provided to make it possible to gather
1062 statistics. Whatever it returns (accept or deny) is immaterial. The "delay"
1063 modifier is forbidden in this ACL.
1064
1065 When the NOTQUIT ACL is running, the variable $smtp_notquit_reason is set
1066 to a string that indicates the reason for the termination of the SMTP
1067 connection. The possible values are:
1068
1069 acl-drop Another ACL issued a "drop" command
1070 bad-commands Too many unknown or non-mail commands
1071 command-timeout Timeout while reading SMTP commands
1072 connection-lost The SMTP connection has been lost
1073 data-timeout Timeout while reading message data
1074 local-scan-error The local_scan() function crashed
1075 local-scan-timeout The local_scan() function timed out
1076 signal-exit SIGTERM or SIGINT
1077 synchronization-error SMTP synchronization error
1078 tls-failed TLS failed to start
1079
1080 In most cases when an SMTP connection is closed without having received
1081 QUIT, Exim sends an SMTP response message before actually closing the
1082 connection. With the exception of acl-drop, the default message can be
1083 overridden by the "message" modifier in the NOTQUIT ACL. In the case of a
1084 "drop" verb in another ACL, it is the message from the other ACL that is
1085 used.
1086
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108710. For MySQL and PostgreSQL lookups, it is now possible to specify a list of
1088 servers with individual queries. This is done by starting the query with
1089 "servers=x:y:z;", where each item in the list may take one of two forms:
1090
1091 (1) If it is just a host name, the appropriate global option (mysql_servers
1092 or pgsql_servers) is searched for a host of the same name, and the
1093 remaining parameters (database, user, password) are taken from there.
1094
1095 (2) If it contains any slashes, it is taken as a complete parameter set.
1096
1097 The list of servers is used in exactly the same was as the global list.
1098 Once a connection to a server has happened and a query has been
1099 successfully executed, processing of the lookup ceases.
1100
1101 This feature is intended for use in master/slave situations where updates
1102 are occurring, and one wants to update a master rather than a slave. If the
1103 masters are in the list for reading, you might have:
1104
1105 mysql_servers = slave1/db/name/pw:slave2/db/name/pw:master/db/name/pw
1106
1107 In an updating lookup, you could then write
1108
1109 ${lookup mysql{servers=master; UPDATE ...}
1110
1111 If, on the other hand, the master is not to be used for reading lookups:
1112
1113 pgsql_servers = slave1/db/name/pw:slave2/db/name/pw
1114
1115 you can still update the master by
1116
1117 ${lookup pgsql{servers=master/db/name/pw; UPDATE ...}
1118
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111911. The message_body_newlines option (default FALSE, for backwards
1120 compatibility) can be used to control whether newlines are present in
1121 $message_body and $message_body_end. If it is FALSE, they are replaced by
1122 spaces.
1123
2b85bce7 1124
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1125Version 4.67
1126------------
1127
1128 1. There is a new log selector called smtp_no_mail, which is not included in
1129 the default setting. When it is set, a line is written to the main log
1130 whenever an accepted SMTP connection terminates without having issued a
4aa45c31 1131 MAIL command.
b4ed4da0 1132
431b7361 1133 2. When an item in a dnslists list is followed by = and & and a list of IP
4aa45c31
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1134 addresses, the behaviour was not clear when the lookup returned more than
1135 one IP address. This has been solved by the addition of == and =& for "all"
93655c46 1136 rather than the default "any" matching.
431b7361 1137
4aa45c31
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1138 3. Up till now, the only control over which cipher suites GnuTLS uses has been
1139 for the cipher algorithms. New options have been added to allow some of the
1140 other parameters to be varied.
431b7361 1141
4aa45c31
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1142 4. There is a new compile-time option called ENABLE_DISABLE_FSYNC. When it is
1143 set, Exim compiles a runtime option called disable_fsync.
431b7361 1144
4aa45c31 1145 5. There is a new variable called $smtp_count_at_connection_start.
431b7361 1146
4aa45c31 1147 6. There's a new control called no_pipelining.
cf8b11a5 1148
41c7c167 1149 7. There are two new variables called $sending_ip_address and $sending_port.
4aa45c31 1150 These are set whenever an SMTP connection to another host has been set up.
41c7c167
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1151
1152 8. The expansion of the helo_data option in the smtp transport now happens
4aa45c31 1153 after the connection to the server has been made.
41c7c167 1154
9c57cbc0 1155 9. There is a new expansion operator ${rfc2047d: that decodes strings that
4aa45c31 1156 are encoded as per RFC 2047.
9c57cbc0 1157
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115810. There is a new log selector called "pid", which causes the current process
1159 id to be added to every log line, in square brackets, immediately after the
1160 time and date.
1161
047bdd8c 116211. Exim has been modified so that it flushes SMTP output before implementing
4c590bd1
PH
1163 a delay in an ACL. It also flushes the output before performing a callout,
1164 as this can take a substantial time. These behaviours can be disabled by
1165 obeying control = no_delay_flush or control = no_callout_flush,
4aa45c31 1166 respectively, at some earlier stage of the connection.
047bdd8c 1167
0ce9abe6 116812. There are two new expansion conditions that iterate over a list. They are
4aa45c31 1169 called forany and forall.
0ce9abe6 1170
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117113. There's a new global option called dsn_from that can be used to vary the
1172 contents of From: lines in bounces and other automatically generated
1173 messages ("delivery status notifications" - hence the name of the option).
0e22dfd1 1174
4aa45c31 117514. The smtp transport has a new option called hosts_avoid_pipelining.
c51b8e75 1176
75b1493f 117715. By default, exigrep does case-insensitive matches. There is now a -I option
4aa45c31 1178 that makes it case-sensitive.
29f89cad 1179
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118016. A number of new features ("addresses", "map", "filter", and "reduce") have
1181 been added to string expansions to make it easier to process lists of
1182 items, typically addresses.
29f89cad 1183
c3611384
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118417. There's a new ACL modifier called "continue". It does nothing of itself,
1185 and processing of the ACL always continues with the next condition or
1186 modifier. It is provided so that the side effects of expanding its argument
4aa45c31 1187 can be used.
c3611384 1188
ec95d1a6 118918. It is now possible to use newline and other control characters (those with
4aa45c31 1190 values less than 32, plus DEL) as separators in lists.
ec95d1a6 1191
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119219. The exigrep utility now has a -v option, which inverts the matching
1193 condition.
1194
c456d9bb 119520. The host_find_failed option in the manualroute router can now be set to
4aa45c31 1196 "ignore".
c456d9bb 1197
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1198
1199Version 4.66
1200------------
1201
1202No new features were added to 4.66.
1203
1204
1205Version 4.65
1206------------
1207
1208No new features were added to 4.65.
1209
38a0a95f
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1210
1211Version 4.64
1212------------
1213
af561417
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1214 1. ACL variables can now be given arbitrary names, as long as they start with
1215 "acl_c" or "acl_m" (for connection variables and message variables), are at
1216 least six characters long, with the sixth character being either a digit or
883335dc 1217 an underscore.
af561417
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1218
1219 2. There is a new ACL modifier called log_reject_target. It makes it possible
883335dc 1220 to specify which logs are used for messages about ACL rejections.
af561417
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1221
1222 3. There is a new authenticator called "dovecot". This is an interface to the
1223 authentication facility of the Dovecot POP/IMAP server, which can support a
883335dc 1224 number of authentication methods.
af561417
PH
1225
1226 4. The variable $message_headers_raw provides a concatenation of all the
1227 messages's headers without any decoding. This is in contrast to
1228 $message_headers, which does RFC2047 decoding on the header contents.
1229
883335dc
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1230 5. In a DNS black list, if two domain names, comma-separated, are given, the
1231 second is used first to do an initial check, making use of any IP value
1232 restrictions that are set. If there is a match, the first domain is used,
1233 without any IP value restrictions, to get the TXT record.
af561417 1234
883335dc 1235 6. All authenticators now have a server_condition option.
af561417
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1236
1237 7. There is a new command-line option called -Mset. It is useful only in
1238 conjunction with -be (that is, when testing string expansions). It must be
1239 followed by a message id; Exim loads the given message from its spool
883335dc 1240 before doing the expansions.
af561417
PH
1241
1242 8. Another similar new command-line option is called -bem. It operates like
883335dc
PH
1243 -be except that it must be followed by the name of a file that contains a
1244 message.
af561417
PH
1245
1246 9. When an address is delayed because of a 4xx response to a RCPT command, it
1247 is now the combination of sender and recipient that is delayed in
883335dc 1248 subsequent queue runs until its retry time is reached.
af561417
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1249
125010. Unary negation and the bitwise logical operators and, or, xor, not, and
883335dc 1251 shift, have been added to the eval: and eval10: expansion items.
48c7f9e2 1252
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125311. The variables $interface_address and $interface_port have been renamed
1254 as $received_ip_address and $received_port, to make it clear that they
1255 relate to message reception rather than delivery. (The old names remain
1256 available for compatibility.)
1257
883335dc
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125812. The "message" modifier can now be used on "accept" and "discard" acl verbs
1259 to vary the message that is sent when an SMTP command is accepted.
4e88a19f 1260
495ae4b0 1261
4608d683
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1262Version 4.63
1263------------
1264
12651. There is a new Boolean option called filter_prepend_home for the redirect
38a0a95f 1266 router.
4608d683 1267
45b91596
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12682. There is a new acl, set by acl_not_smtp_start, which is run right at the
1269 start of receiving a non-SMTP message, before any of the message has been
38a0a95f 1270 read.
45b91596 1271
a5bd321b
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12723. When an SMTP error message is specified in a "message" modifier in an ACL,
1273 or in a :fail: or :defer: message in a redirect router, Exim now checks the
38a0a95f 1274 start of the message for an SMTP error code.
a5bd321b 1275
6ec97b1b 12764. There is a new parameter for LDAP lookups called "referrals", which takes
38a0a95f 1277 one of the settings "follow" (the default) or "nofollow".
6ec97b1b 1278
e22ca4ac
JJ
12795. Version 20070721.2 of exipick now included, offering these new options:
1280 --reverse
1281 After all other sorting options have bee processed, reverse order
1282 before displaying messages (-R is synonym).
1283 --random
1284 Randomize order of matching messages before displaying.
1285 --size
1286 Instead of displaying the matching messages, display the sum
1287 of their sizes.
1288 --sort <variable>[,<variable>...]
1289 Before displaying matching messages, sort the messages according to
1290 each messages value for each variable.
1291 --not
1292 Negate the value for every test (returns inverse output from the
1293 same criteria without --not).
1294
4608d683 1295
1cce3af8
PH
1296Version 4.62
1297------------
1298
12991. The ${readsocket expansion item now supports Internet domain sockets as well
1300 as Unix domain sockets. If the first argument begins "inet:", it must be of
1301 the form "inet:host:port". The port is mandatory; it may be a number or the
1302 name of a TCP port in /etc/services. The host may be a name, or it may be an
1303 IP address. An ip address may optionally be enclosed in square brackets.
1304 This is best for IPv6 addresses. For example:
1305
1306 ${readsocket{inet:[::1]:1234}{<request data>}...
1307
1308 Only a single host name may be given, but if looking it up yield more than
1309 one IP address, they are each tried in turn until a connection is made. Once
1310 a connection has been made, the behaviour is as for ${readsocket with a Unix
1311 domain socket.
1312
f7fd3850
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13132. If a redirect router sets up file or pipe deliveries for more than one
1314 incoming address, and the relevant transport has batch_max set greater than
1315 one, a batch delivery now occurs.
1316
d6629cdc
PH
13173. The appendfile transport has a new option called maildirfolder_create_regex.
1318 Its value is a regular expression. For a maildir delivery, this is matched
1319 against the maildir directory; if it matches, Exim ensures that a
1320 maildirfolder file is created alongside the new, cur, and tmp directories.
1321
1cce3af8 1322
7e66e54d
PH
1323Version 4.61
1324------------
1325
4f578862
PH
1326The documentation is up-to-date for the 4.61 release. Major new features since
1327the 4.60 release are:
1328
1329. An option called disable_ipv6, to disable the use of IPv6 completely.
1330
1331. An increase in the number of ACL variables to 20 of each type.
1332
1333. A change to use $auth1, $auth2, and $auth3 in authenticators instead of $1,
1334 $2, $3, (though those are still set) because the numeric variables get used
1335 for other things in complicated expansions.
1336
843a41e8 1337. The default for rfc1413_query_timeout has been changed from 30s to 5s.
4f578862
PH
1338
1339. It is possible to use setclassresources() on some BSD OS to control the
1340 resources used in pipe deliveries.
1341
1342. A new ACL modifier called add_header, which can be used with any verb.
1343
1344. More errors are detectable in retry rules.
1345
1346There are a number of other additions too.
71fafd95 1347
7e66e54d 1348
425ae40f 1349Version 4.60
b5aea5e1
PH
1350------------
1351
425ae40f
PH
1352The documentation is up-to-date for the 4.60 release. Major new features since
1353the 4.50 release are:
1a46a8c5 1354
425ae40f 1355. Support for SQLite.
1a46a8c5 1356
425ae40f 1357. Support for IGNOREQUOTA in LMTP.
1a46a8c5 1358
425ae40f 1359. Extensions to the "submission mode" features.
1a46a8c5 1360
425ae40f 1361. Support for Client SMTP Authorization (CSA).
1a46a8c5 1362
425ae40f 1363. Support for ratelimiting hosts and users.
b5aea5e1 1364
425ae40f 1365. New expansion items to help with the BATV "prvs" scheme.
b5aea5e1 1366
425ae40f 1367. A "match_ip" condition, that matches an IP address against a list.
35edf2ff 1368
425ae40f 1369There are many more minor changes.
495ae4b0
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1370
1371****