DANE: move to mainline
[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
d4fd1b83 9Version 4.91
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10--------------
11
12 1. Dual-certificate stacks on servers now support OCSP stapling, under GnuTLS
13 version 3.5.6 or later.
14
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15 2. DANE is now supported under GnuTLS version 3.0.0 or later. Both GnuTLS and
16 OpenSSL versions are moved to mainline support from Experimental.
899b8bbc 17
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18 3. Feature macros for the compiled-in set of malware scanner interfaces.
19
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20 4. SPF support is promoted from Experimental to mainline status. The template
21 src/EDITME makefile does not enable its inclusion.
22
306c6c77 23 5. Logging control for DKIM verification. The existing DKIM log line is
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24 controlled by a "dkim_verbose" selector which is _not_ enabled by default.
25 A new tag "DKIM=<domain>" is added to <= lines by default, controlled by
26 a "dkim" log_selector.
27
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28 6. Receive duration on <= lines, under a new log_selector "receive_time".
29
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30 7. Options "ipv4_only" and "ipv4_prefer" on the dnslookup router and on
31 routing rules in the manualroute router.
32
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33 8. Expansion item ${sha3:<string>} / ${sha3_<N>:<string>} now also supported
34 under OpenSSL version 1.1.1 or later.
35
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36 9. DKIM operations can now use the Ed25519 algorithm in addition to RSA, under
37 GnuTLS 3.6.0 or later.
38
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3910. Builtin feature-macros _CRYPTO_HASH_SHA3 and _CRYPTO_SIGN_ED25519, library
40 version dependent.
41
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4211. "exim -bP macro <name>" returns caller-usable status.
43
47195144 44
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45Version 4.90
46------------
47
48 1. PKG_CONFIG_PATH can now be set in Local/Makefile;
49 wildcards will be expanded, values are collapsed.
50
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51 2. The ${readsocket } expansion now takes an option to not shutdown the
52 connection after sending the query string. The default remains to do so.
53
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54 3. An smtp transport option "hosts_noproxy_tls" to control whether multiple
55 deliveries on a single TCP connection can maintain a TLS connection
56 open. By default disabled for all hosts, doing so saves the cost of
57 making new TLS sessions, at the cost of having to proxy the data via
58 another process. Logging is also affected.
59
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60 4. A malware connection type for the FPSCAND protocol.
61
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62 5. An option for recipient verify callouts to hold the connection open for
63 further recipients and for delivery.
64
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65 6. The reproducible build $SOURCE_DATE_EPOCH environment variable is now
66 supported.
67
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68 7. Optionally, an alternate format for spool data-files which matches the
69 wire format - meaning more efficient reception and transmission (at the
70 cost of difficulty with standard Unix tools). Only used for messages
71 received using the ESMTP CHUNKING option, and when a new main-section
72 option "spool_wireformat" (false by default) is set.
73
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74 8. New main configuration option "commandline_checks_require_admin" to
75 restrict who can use various introspection options.
76
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77 9. New option modifier "no_check" for quota and quota_filecount
78 appendfile transport.
79
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8010. Variable $smtp_command_history returning a comma-sep list of recent
81 SMTP commands.
82
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8311. Millisecond timetamps in logs, on log_selector "millisec". Also affects
84 log elements QT, DT and D, and timstamps in debug output.
571b2715 85
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8612. TCP Fast Open logging. As a server, logs when the SMTP banner was sent
87 while still in SYN_RECV state; as a client logs when the connection
4a5cbaff 88 is opened with a TFO cookie.
a2673768 89
9e70917d 9013. DKIM support for multiple signing, by domain and/or key-selector.
7c6ec81b 91 DKIM support for multiple hashes, and for alternate-identity tags.
970424a5 92 Builtin macro with default list of signed headers.
484cc1a9 93 Better syntax for specifying oversigning.
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94 The DKIM ACL can override verification status, and status is visible in
95 the data ACL.
d73e45df 96
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9714. Exipick understands -C|--config for an alternative Exim
98 configuration file.
99
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10015. TCP Fast Open used, with data-on-SYN, for client SMTP via SOCKS5 proxy,
101 for ${readsocket } expansions, and for ClamAV.
102
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10316. The "-be" expansion test mode now supports macros. Macros are expanded
104 in test lines, and new macros can be defined.
105
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10617. Support for server-side dual-certificate-stacks (eg. RSA + ECDSA).
107
856d1e16 108
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109Version 4.89
110------------
111
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112 1. Allow relative config file names for ".include"
113
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114 2. A main-section config option "debug_store" to control the checks on
115 variable locations during store-reset. Normally false but can be enabled
116 when a memory corrution issue is suspected on a production system.
117
fd047340 118
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119Version 4.88
120------------
121
fc16abb4 122 1. The new perl_taintmode option allows to run the embedded perl
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123 interpreter in taint mode.
124
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125 2. New log_selector: dnssec, adds a "DS" tag to acceptance and delivery lines.
126
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127 3. Speculative debugging, via a "kill" option to the "control=debug" ACL
128 modifier.
129
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130 4. New expansion item ${sha3:<string>} / ${sha3_<N>:<string>}.
131 N can be 224, 256 (default), 384, 512.
132 With GnuTLS 3.5.0 or later, only.
133
f59aaaaa 134 5. Facility for named queues: A command-line argument can specify
55e70e76 135 the queue name for a queue operation, and an ACL modifier can set
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136 the queue to be used for a message. A $queue_name variable gives
137 visibility.
28b3821f 138
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139 6. New expansion operators base32/base32d.
140
44bc8f0c 141 7. The CHUNKING ESMTP extension from RFC 3030. May give some slight
7e3ce68e 142 performance increase and network load decrease. Main config option
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143 chunking_advertise_hosts, and smtp transport option hosts_try_chunking
144 for control.
7e3ce68e 145
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146 8. LMDB lookup support, as Experimental. Patch supplied by Andrew Colin Kissa.
147
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148 9. Expansion operator escape8bit, like escape but not touching newline etc..
149
fbbd45ff 15010. Feature macros, generated from compile options. All start with "_HAVE_"
4945f557 151 and go on with some roughly recognisable name. Driver macros, for
383832ef 152 router, transport and authentication drivers; names starting with "_DRIVER_".
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153 Option macros, for each configuration-file option; all start with "_OPT_".
154 Use the "-bP macros" command-line option to see what is present.
fbbd45ff 155
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15611. Integer values for options can take a "G" multiplier.
157
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15812. defer=pass option for the ACL control cutthrough_delivery, to reflect 4xx
159 returns from the target back to the initiator, rather than spooling the
160 message.
161
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16213. New built-in constants available for tls_dhparam and default changed.
163
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16414. If built with EXPERIMENTAL_QUEUEFILE, a queuefile transport, for writing
165 out copies of the message spool files for use by 3rd-party scanners.
166
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16715. A new option on the smtp transport, hosts_try_fastopen. If the system
168 supports it (on Linux it must be enabled in the kernel by the sysadmin)
169 try to use RFC 7413 "TCP Fast Open". No data is sent on the SYN segment
170 but it permits a peer that also supports the facility to send its SMTP
171 banner immediately after the SYN,ACK segment rather then waiting for
172 another ACK - so saving up to one roundtrip time. Because it requires
173 previous communication with the peer (we save a cookie from it) this
f59aaaaa 174 will only become active on frequently-contacted destinations.
fb05276a 175
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17616. A new syslog_pid option to suppress PID duplication in syslog lines.
177
8d042305 178
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179Version 4.87
180------------
181
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182 1. The ACL conditions regex and mime_regex now capture substrings
183 into numeric variables $regex1 to 9, like the "match" expansion condition.
184
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185 2. New $callout_address variable records the address used for a spam=,
186 malware= or verify= callout.
187
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188 3. Transports now take a "max_parallel" option, to limit concurrency.
189
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190 4. Expansion operators ${ipv6norm:<string>} and ${ipv6denorm:<string>}.
191 The latter expands to a 8-element colon-sep set of hex digits including
192 leading zeroes. A trailing ipv4-style dotted-decimal set is converted
193 to hex. Pure ipv4 addresses are converted to IPv4-mapped IPv6.
194 The former operator strips leading zeroes and collapses the longest
195 set of 0-groups to a double-colon.
196
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197 5. New "-bP config" support, to dump the effective configuration.
198
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199 6. New $dkim_key_length variable.
200
9aa35e9c 201 7. New base64d and base64 expansion items (the existing str2b64 being a
59b87190 202 synonym of the latter). Add support in base64 for certificates.
9aa35e9c 203
62b7cd08 204 8. New main configuration option "bounce_return_linesize_limit" to
f59aaaaa 205 avoid oversize bodies in bounces. The default value matches RFC
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206 limits.
207
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208 9. New $initial_cwd expansion variable.
209
0d9b78be 210
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211Version 4.86
212------------
213
214 1. Support for using the system standard CA bundle.
215
216 2. New expansion items $config_file, $config_dir, containing the file
217 and directory name of the main configuration file. Also $exim_version.
218
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219 3. New "malware=" support for Avast.
220
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221 4. New "spam=" variant option for Rspamd.
222
223 5. Assorted options on malware= and spam= scanners.
224
f59aaaaa 225 6. A command-line option to write a comment into the logfile.
cc00f4af 226
7eb6c37c 227 7. If built with EXPERIMENTAL_SOCKS feature enabled, the smtp transport can
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228 be configured to make connections via socks5 proxies.
229
230 8. If built with EXPERIMENTAL_INTERNATIONAL, support is included for
231 the transmission of UTF-8 envelope addresses.
7eb6c37c 232
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233 9. If built with EXPERIMENTAL_INTERNATIONAL, an expansion item for a commonly
234 used encoding of Maildir folder names.
235
b3ef41c9 23610. A logging option for slow DNS lookups.
846430d9 237
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23811. New ${env {<variable>}} expansion.
239
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24012. A non-SMTP authenticator using information from TLS client certificates.
241
10ca4f1c 24213. Main option "tls_eccurve" for selecting an Elliptic Curve for TLS.
65463bc9 243 Patch originally by Wolfgang Breyha.
10ca4f1c 244
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24514. Main option "dns_trust_aa" for trusting your local nameserver at the
246 same level as DNSSEC.
247
7eb6c37c 248
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249Version 4.85
250------------
251
252 1. If built with EXPERIMENTAL_DANE feature enabled, Exim will follow the
f59aaaaa 253 DANE SMTP draft to assess a secure chain of trust of the certificate
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254 used to establish the TLS connection based on a TLSA record in the
255 domain of the sender.
256
257 2. The EXPERIMENTAL_TPDA feature has been renamed to EXPERIMENTAL_EVENT
258 and several new events have been created. The reason is because it has
259 been expanded beyond just firing events during the transport phase. Any
260 existing TPDA transport options will have to be rewritten to use a new
261 $event_name expansion variable in a condition. Refer to the
262 experimental-spec.txt for details and examples.
263
264 3. The EXPERIMENTAL_CERTNAMES features is an enhancement to verify that
265 server certs used for TLS match the result of the MX lookup. It does
266 not use the same mechanism as DANE.
267
268
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269Version 4.84
270------------
271
272
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273Version 4.83
274------------
275
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276 1. If built with the EXPERIMENTAL_PROXY feature enabled, Exim can be
277 configured to expect an initial header from a proxy that will make the
278 actual external source IP:host be used in exim instead of the IP of the
279 proxy that is connecting to it.
280
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281 2. New verify option header_names_ascii, which will check to make sure
282 there are no non-ASCII characters in header names. Exim itself handles
283 those non-ASCII characters, but downstream apps may not, so Exim can
284 detect and reject if those characters are present.
285
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286 3. New expansion operator ${utf8clean:string} to replace malformed UTF8
287 codepoints with valid ones.
288
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289 4. New malware type "sock". Talks over a Unix or TCP socket, sending one
290 command line and matching a regex against the return data for trigger
007a2dee 291 and a second regex to extract malware_name. The mail spoolfile name can
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292 be included in the command line.
293
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294 5. The smtp transport now supports options "tls_verify_hosts" and
295 "tls_try_verify_hosts". If either is set the certificate verification
296 is split from the encryption operation. The default remains that a failed
297 verification cancels the encryption.
214042d2 298
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299 6. New SERVERS override of default ldap server list. In the ACLs, an ldap
300 lookup can now set a list of servers to use that is different from the
301 default list.
302
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303 7. New command-line option -C for exiqgrep to specify alternate exim.conf
304 file when searching the queue.
305
f2de3a33 306 8. OCSP now supports GnuTLS also, if you have version 3.1.3 or later of that.
2b4a568d 307
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308 9. Support for DNSSEC on outbound connections.
309
9d1c15ef 31010. New variables "tls_(in,out)_(our,peer)cert" and expansion item
6a8a60e0 311 "certextract" to extract fields from them. Hash operators md5 and sha1
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312 work over them for generating fingerprints, and a new sha256 operator
313 for them added.
9d1c15ef 314
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31511. PRDR is now supported dy default.
316
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31712. OCSP stapling is now supported by default.
318
31913. If built with the EXPERIMENTAL_DSN feature enabled, Exim will output
4c04137d 320 Delivery Status Notification messages in MIME format, and negotiate
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321 DSN features per RFC 3461.
322
6ece2e77 323
2c422e6f 324Version 4.82
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325------------
326
327 1. New command-line option -bI:sieve will list all supported sieve extensions
328 of this Exim build on standard output, one per line.
329 ManageSieve (RFC 5804) providers managing scripts for use by Exim should
330 query this to establish the correct list to include in the protocol's
331 SIEVE capability line.
332
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333 2. If the -n option is combined with the -bP option, then the name of an
334 emitted option is not output, only the value (if visible to you).
335 For instance, "exim -n -bP pid_file_path" should just emit a pathname
336 followed by a newline, and no other text.
337
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338 3. When built with SUPPORT_TLS and USE_GNUTLS, the SMTP transport driver now
339 has a "tls_dh_min_bits" option, to set the minimum acceptable number of
340 bits in the Diffie-Hellman prime offered by a server (in DH ciphersuites)
341 acceptable for security. (Option accepted but ignored if using OpenSSL).
342 Defaults to 1024, the old value. May be lowered only to 512, or raised as
343 far as you like. Raising this may hinder TLS interoperability with other
344 sites and is not currently recommended. Lowering this will permit you to
345 establish a TLS session which is not as secure as you might like.
346
347 Unless you really know what you are doing, leave it alone.
348
1f4a55da 349 4. If not built with DISABLE_DNSSEC, Exim now has the main option
0fbd9bff 350 dns_dnssec_ok; if set to 1 then Exim will initialise the resolver library
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351 to send the DO flag to your recursive resolver. If you have a recursive
352 resolver, which can set the Authenticated Data (AD) flag in results, Exim
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353 can now detect this. Exim does not perform validation itself, instead
354 relying upon a trusted path to the resolver.
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355
356 Current status: work-in-progress; $sender_host_dnssec variable added.
357
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358 5. DSCP support for outbound connections: on a transport using the smtp driver,
359 set "dscp = ef", for instance, to cause the connections to have the relevant
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360 DSCP (IPv4 TOS or IPv6 TCLASS) value in the header.
361
362 Similarly for inbound connections, there is a new control modifier, dscp,
363 so "warn control = dscp/ef" in the connect ACL, or after authentication.
364
365 Supported values depend upon system libraries. "exim -bI:dscp" to list the
366 ones Exim knows of. You can also set a raw number 0..0x3F.
36a3ae5f 367
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368 6. The -G command-line flag is no longer ignored; it is now equivalent to an
369 ACL setting "control = suppress_local_fixups". The -L command-line flag
370 is now accepted and forces use of syslog, with the provided tag as the
371 process name. A few other flags used by Sendmail are now accepted and
372 ignored.
373
976b7e9f 374 7. New cutthrough routing feature. Requested by a "control = cutthrough_delivery"
4c04137d 375 ACL modifier; works for single-recipient mails which are received on and
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376 deliverable via SMTP. Using the connection made for a recipient verify,
377 if requested before the verify, or a new one made for the purpose while
378 the inbound connection is still active. The bulk of the mail item is copied
379 direct from the inbound socket to the outbound (as well as the spool file).
380 When the source notifies the end of data, the data acceptance by the destination
4c04137d 381 is negotiated before the acceptance is sent to the source. If the destination
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382 does not accept the mail item, for example due to content-scanning, the item
383 is not accepted from the source and therefore there is no need to generate
384 a bounce mail. This is of benefit when providing a secondary-MX service.
385 The downside is that delays are under the control of the ultimate destination
386 system not your own.
387
4c04137d 388 The Received-by: header on items delivered by cutthrough is generated
042eb971 389 early in reception rather than at the end; this will affect any timestamp
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390 included. The log line showing delivery is recorded before that showing
391 reception; it uses a new ">>" tag instead of "=>".
06a6f4ed 392
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393 To support the feature, verify-callout connections can now use ESMTP and TLS.
394 The usual smtp transport options are honoured, plus a (new, default everything)
395 hosts_verify_avoid_tls.
396
397 New variable families named tls_in_cipher, tls_out_cipher etc. are introduced
398 for specific access to the information for each connection. The old names
399 are present for now but deprecated.
400
fcc8e047 401 Not yet supported: IGNOREQUOTA, SIZE, PIPELINING.
976b7e9f 402
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403 8. New expansion operators ${listnamed:name} to get the content of a named list
404 and ${listcount:string} to count the items in a list.
98a90c36 405
2519e60d 406 9. New global option "gnutls_allow_auto_pkcs11", defaults false. The GnuTLS
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407 rewrite in 4.80 combines with GnuTLS 2.12.0 or later, to autoload PKCS11
408 modules. For some situations this is desirable, but we expect admin in
409 those situations to know they want the feature. More commonly, it means
410 that GUI user modules get loaded and are broken by the setuid Exim being
411 unable to access files specified in environment variables and passed
412 through, thus breakage. So we explicitly inhibit the PKCS11 initialisation
413 unless this new option is set.
414
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415 Some older OS's with earlier versions of GnuTLS might not have pkcs11 ability,
416 so have also added a build option which can be used to build Exim with GnuTLS
417 but without trying to use any kind of PKCS11 support. Uncomment this in the
418 Local/Makefile:
419
420 AVOID_GNUTLS_PKCS11=yes
421
3e8abda0 42210. The "acl = name" condition on an ACL now supports optional arguments.
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423 New expansion item "${acl {name}{arg}...}" and expansion condition
424 "acl {{name}{arg}...}" are added. In all cases up to nine arguments
425 can be used, appearing in $acl_arg1 to $acl_arg9 for the called ACL.
426 Variable $acl_narg contains the number of arguments. If the ACL sets
427 a "message =" value this becomes the result of the expansion item,
428 or the value of $value for the expansion condition. If the ACL returns
429 accept the expansion condition is true; if reject, false. A defer
430 return results in a forced fail.
a5f239e4 431
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43211. Routers and transports can now have multiple headers_add and headers_remove
433 option lines. The concatenated list is used.
434
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43512. New ACL modifier "remove_header" can remove headers before message gets
436 handled by routers/transports.
437
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43813. New dnsdb lookup pseudo-type "a+". A sequence of "a6" (if configured),
439 "aaaa" and "a" lookups is done and the full set of results returned.
440
362145b5 44114. New expansion variable $headers_added with content from ACL add_header
85ffcba6 442 modifier (but not yet added to message).
362145b5 443
bd0fff00 44415. New 8bitmime status logging option for received messages. Log field "M8S".
3c0a92dc 445
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44616. New authenticated_sender logging option, adding to log field "A".
447
181d9bf8 44817. New expansion variables $router_name and $transport_name. Useful
f59aaaaa 449 particularly for debug_print as -bt command-line option does not
2a47f028 450 require privilege whereas -d does.
181d9bf8 451
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45218. If built with EXPERIMENTAL_PRDR, per-recipient data responses per a
453 proposed extension to SMTP from Eric Hall.
454
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45519. The pipe transport has gained the force_command option, to allow
456 decorating commands from user .forward pipe aliases with prefix
457 wrappers, for instance.
458
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45920. Callout connections can now AUTH; the same controls as normal delivery
460 connections apply.
461
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46221. Support for DMARC, using opendmarc libs, can be enabled. It adds new
463 options: dmarc_forensic_sender, dmarc_history_file, and dmarc_tld_file.
464 It adds new expansion variables $dmarc_ar_header, $dmarc_status,
465 $dmarc_status_text, and $dmarc_used_domain. It adds a new acl modifier
466 dmarc_status. It adds new control flags dmarc_disable_verify and
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467 dmarc_enable_forensic. The default for the dmarc_tld_file option is
468 "/etc/exim/opendmarc.tlds" and can be changed via EDITME.
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469
47022. Add expansion variable $authenticated_fail_id, which is the username
471 provided to the authentication method which failed. It is available
472 for use in subsequent ACL processing (typically quit or notquit ACLs).
473
4c04137d 47423. New ACL modifier "udpsend" can construct a UDP packet to send to a given
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475 UDP host and port.
476
47724. New ${hexquote:..string..} expansion operator converts non-printable
478 characters in the string to \xNN form.
479
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48025. Experimental TPDA (Transport Post Delivery Action) function added.
481 Patch provided by Axel Rau.
482
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48326. Experimental Redis lookup added. Patch provided by Warren Baker.
484
181d9bf8 485
b1770b6e 486Version 4.80
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487------------
488
489 1. New authenticator driver, "gsasl". Server-only (at present).
490 This is a SASL interface, licensed under GPL, which can be found at
491 http://www.gnu.org/software/gsasl/.
492 This system does not provide sources of data for authentication, so
3b4f55a3 493 careful use needs to be made of the conditions in Exim.
c1e794ba 494
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495 2. New authenticator driver, "heimdal_gssapi". Server-only.
496 A replacement for using cyrus_sasl with Heimdal, now that $KRB5_KTNAME
497 is no longer honoured for setuid programs by Heimdal. Use the
498 "server_keytab" option to point to the keytab.
499
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500 3. The "pkg-config" system can now be used when building Exim to reference
501 cflags and library information for lookups and authenticators, rather
502 than having to update "CFLAGS", "AUTH_LIBS", "LOOKUP_INCLUDE" and
7e6a8985
PP
503 "LOOKUP_LIBS" directly. Similarly for handling the TLS library support
504 without adjusting "TLS_INCLUDE" and "TLS_LIBS".
252e0c7b 505
6a6084f8
PP
506 In addition, setting PCRE_CONFIG=yes will query the pcre-config tool to
507 find the headers and libraries for PCRE.
508
f1e05cc7 509 4. New expansion variable $tls_bits.
20aa9dbd 510
4a6a987a
PP
511 5. New lookup type, "dbmjz". Key is an Exim list, the elements of which will
512 be joined together with ASCII NUL characters to construct the key to pass
3b4f55a3
PP
513 into the DBM library. Can be used with gsasl to access sasldb2 files as
514 used by Cyrus SASL.
4a6a987a 515
da3ad30d
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516 6. OpenSSL now supports TLS1.1 and TLS1.2 with OpenSSL 1.0.1.
517
518 Avoid release 1.0.1a if you can. Note that the default value of
519 "openssl_options" is no longer "+dont_insert_empty_fragments", as that
520 increased susceptibility to attack. This may still have interoperability
521 implications for very old clients (see version 4.31 change 37) but
522 administrators can choose to make the trade-off themselves and restore
523 compatibility at the cost of session security.
524
7be682ca
PP
525 7. Use of the new expansion variable $tls_sni in the main configuration option
526 tls_certificate will cause Exim to re-expand the option, if the client
527 sends the TLS Server Name Indication extension, to permit choosing a
528 different certificate; tls_privatekey will also be re-expanded. You must
529 still set these options to expand to valid files when $tls_sni is not set.
3f0945ff
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530
531 The SMTP Transport has gained the option tls_sni, which will set a hostname
532 for outbound TLS sessions, and set $tls_sni too.
533
534 A new log_selector, +tls_sni, has been added, to log received SNI values
535 for Exim as a server.
536
9cbad13b
PP
537 8. The existing "accept_8bitmime" option now defaults to true. This means
538 that Exim is deliberately not strictly RFC compliant. We're following
539 Dan Bernstein's advice in http://cr.yp.to/smtp/8bitmime.html by default.
540 Those who disagree, or know that they are talking to mail servers that,
541 even today, are not 8-bit clean, need to turn off this option.
542
9ee44efb
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543 9. Exim can now be started with -bw (with an optional timeout, given as
544 -bw<timespec>). With this, stdin at startup is a socket that is
545 already listening for connections. This has a more modern name of
546 "socket activation", but forcing the activated socket to fd 0. We're
547 interested in adding more support for modern variants.
548
eae0036b 54910. ${eval } now uses 64-bit values on supporting platforms. A new "G" suffix
97d17305
JH
550 for numbers indicates multiplication by 1024^3.
551
17c76198
PP
55211. The GnuTLS support has been revamped; the three options gnutls_require_kx,
553 gnutls_require_mac & gnutls_require_protocols are no longer supported.
554 tls_require_ciphers is now parsed by gnutls_priority_init(3) as a priority
555 string, documentation for which is at:
42bfef1e 556 http://www.gnutls.org/manual/html_node/Priority-Strings.html
17c76198
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557
558 SNI support has been added to Exim's GnuTLS integration too.
559
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560 For sufficiently recent GnuTLS libraries, ${randint:..} will now use
561 gnutls_rnd(), asking for GNUTLS_RND_NONCE level randomness.
562
53947857 56312. With OpenSSL, if built with EXPERIMENTAL_OCSP, a new option tls_ocsp_file
3f7eeb86
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564 is now available. If the contents of the file are valid, then Exim will
565 send that back in response to a TLS status request; this is OCSP Stapling.
566 Exim will not maintain the contents of the file in any way: administrators
567 are responsible for ensuring that it is up-to-date.
568
569 See "experimental-spec.txt" for more details.
570
eae0036b
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57113. ${lookup dnsdb{ }} supports now SPF record types. They are handled
572 identically to TXT record lookups.
573
2605c55b 57414. New expansion variable $tod_epoch_l for higher-precision time.
c1e794ba 575
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57615. New global option tls_dh_max_bits, defaulting to current value of NSS
577 hard-coded limit of DH ephemeral bits, to fix interop problems caused by
578 GnuTLS 2.12 library recommending a bit count higher than NSS supports.
579
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58016. tls_dhparam now used by both OpenSSL and GnuTLS, can be path or identifier.
581 Option can now be a path or an identifier for a standard prime.
582 If unset, we use the DH prime from section 2.2 of RFC 5114, "ike23".
583 Set to "historic" to get the old GnuTLS behaviour of auto-generated DH
584 primes.
585
3ecab157 58617. SSLv2 now disabled by default in OpenSSL. (Never supported by GnuTLS).
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587 Use "openssl_options -no_sslv2" to re-enable support, if your OpenSSL
588 install was not built with OPENSSL_NO_SSL2 ("no-ssl2").
589
9e45c72b 590
3ce96ada
TF
591Version 4.77
592------------
593
594 1. New options for the ratelimit ACL condition: /count= and /unique=.
595 The /noupdate option has been replaced by a /readonly option.
596
061b7ebd
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597 2. The SMTP transport's protocol option may now be set to "smtps", to
598 use SSL-on-connect outbound.
599
9e949f00
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600 3. New variable $av_failed, set true if the AV scanner deferred; ie, when
601 there is a problem talking to the AV scanner, or the AV scanner running.
602
39257585
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603 4. New expansion conditions, "inlist" and "inlisti", which take simple lists
604 and check if the search item is a member of the list. This does not
605 support named lists, but does subject the list part to string expansion.
606
607 5. Unless the new EXPAND_LISTMATCH_RHS build option is set when Exim was
608 built, Exim no longer performs string expansion on the second string of
609 the match_* expansion conditions: "match_address", "match_domain",
610 "match_ip" & "match_local_part". Named lists can still be used.
611
7c6d71af 612
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613Version 4.76
614------------
615
616 1. The global option "dns_use_edns0" may be set to coerce EDNS0 usage on
617 or off in the resolver library.
618
619
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620Version 4.75
621------------
622
623 1. In addition to the existing LDAP and LDAP/SSL ("ldaps") support, there
624 is now LDAP/TLS support, given sufficiently modern OpenLDAP client
625 libraries. The following global options have been added in support of
626 this: ldap_ca_cert_dir, ldap_ca_cert_file, ldap_cert_file, ldap_cert_key,
627 ldap_cipher_suite, ldap_require_cert, ldap_start_tls.
628
2fe76745
PP
629 2. The pipe transport now takes a boolean option, "freeze_signal", default
630 false. When true, if the external delivery command exits on a signal then
631 Exim will freeze the message in the queue, instead of generating a bounce.
632
f1e5fef5
PP
633 3. Log filenames may now use %M as an escape, instead of %D (still available).
634 The %M pattern expands to yyyymm, providing month-level resolution.
635
332f5cf3
PP
636 4. The $message_linecount variable is now updated for the maildir_tag option,
637 in the same way as $message_size, to reflect the real number of lines,
638 including any header additions or removals from transport.
639
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640 5. When contacting a pool of SpamAssassin servers configured in spamd_address,
641 Exim now selects entries randomly, to better scale in a cluster setup.
642
bc19a55b 643
a01ba081
PP
644Version 4.74
645------------
646
1670ef10
PP
647 1. SECURITY FIX: privilege escalation flaw fixed. On Linux (and only Linux)
648 the flaw permitted the Exim run-time user to cause root to append to
649 arbitrary files of the attacker's choosing, with the content based
650 on content supplied by the attacker.
651
652 2. Exim now supports loading some lookup types at run-time, using your
a01ba081
PP
653 platform's dlopen() functionality. This has limited platform support
654 and the intention is not to support every variant, it's limited to
655 dlopen(). This permits the main Exim binary to not be linked against
656 all the libraries needed for all the lookup types.
657
658
77bb000f
PP
659Version 4.73
660------------
661
2cfd3221
PP
662 NOTE: this version is not guaranteed backwards-compatible, please read the
663 items below carefully
664
77bb000f
PP
665 1. A new main configuration option, "openssl_options", is available if Exim
666 is built with SSL support provided by OpenSSL. The option allows
667 administrators to specify OpenSSL options to be used on connections;
668 typically this is to set bug compatibility features which the OpenSSL
669 developers have not enabled by default. There may be security
670 consequences for certain options, so these should not be changed
671 frivolously.
672
a29e5231
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673 2. A new pipe transport option, "permit_coredumps", may help with problem
674 diagnosis in some scenarios. Note that Exim is typically installed as
675 a setuid binary, which on most OSes will inhibit coredumps by default,
43236f35 676 so that safety mechanism would have to be overridden for this option to
a29e5231
PP
677 be able to take effect.
678
8544e77a
PP
679 3. ClamAV 0.95 is now required for ClamAV support in Exim, unless
680 Local/Makefile sets: WITH_OLD_CLAMAV_STREAM=yes
681 Note that this switches Exim to use a new API ("INSTREAM") and a future
682 release of ClamAV will remove support for the old API ("STREAM").
683
684 The av_scanner option, when set to "clamd", now takes an optional third
685 part, "local", which causes Exim to pass a filename to ClamAV instead of
686 the file content. This is the same behaviour as when clamd is pointed at
687 a Unix-domain socket. For example:
688
689 av_scanner = clamd:192.0.2.3 1234:local
690
491fab4c
PP
691 ClamAV's ExtendedDetectionInfo response format is now handled.
692
8544e77a
PP
693 4. There is now a -bmalware option, restricted to admin users. This option
694 takes one parameter, a filename, and scans that file with Exim's
695 malware-scanning framework. This is intended purely as a debugging aid
696 to ensure that Exim's scanning is working, not to replace other tools.
a9622bc6
PP
697 Note that the ACL framework is not invoked, so if av_scanner references
698 ACL variables without a fallback then this will fail.
8544e77a 699
83e029d5
PP
700 5. There is a new expansion operator, "reverse_ip", which will reverse IP
701 addresses; IPv4 into dotted quad, IPv6 into dotted nibble. Examples:
702
703 ${reverse_ip:192.0.2.4}
704 -> 4.2.0.192
705 ${reverse_ip:2001:0db8:c42:9:1:abcd:192.0.2.3}
706 -> 3.0.2.0.0.0.0.c.d.c.b.a.1.0.0.0.9.0.0.0.2.4.c.0.8.b.d.0.1.0.0.2
707
ed7f7860
PP
708 6. There is a new ACL control called "debug", to enable debug logging.
709 This allows selective logging of certain incoming transactions within
710 production environments, with some care. It takes two options, "tag"
711 and "opts"; "tag" is included in the filename of the log and "opts"
712 is used as per the -d<options> command-line option. Examples, which
713 don't all make sense in all contexts:
714
715 control = debug
716 control = debug/tag=.$sender_host_address
717 control = debug/opts=+expand+acl
718 control = debug/tag=.$message_exim_id/opts=+expand
719
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PP
720 7. It has always been implicit in the design and the documentation that
721 "the Exim user" is not root. src/EDITME said that using root was
722 "very strongly discouraged". This is not enough to keep people from
723 shooting themselves in the foot in days when many don't configure Exim
724 themselves but via package build managers. The security consequences of
725 running various bits of network code are severe if there should be bugs in
726 them. As such, the Exim user may no longer be root. If configured
727 statically, Exim will refuse to build. If configured as ref:user then Exim
728 will exit shortly after start-up. If you must shoot yourself in the foot,
729 then henceforth you will have to maintain your own local patches to strip
730 the safeties off.
731
06a6f4ed 732 8. There is a new expansion condition, bool_lax{}. Where bool{} uses the ACL
6a8de854
PP
733 condition logic to determine truth/failure and will fail to expand many
734 strings, bool_lax{} uses the router condition logic, where most strings
735 do evaluate true.
736 Note: bool{00} is false, bool_lax{00} is true.
737
06a6f4ed 738 9. Routers now support multiple "condition" tests.
532be449 739
5dc43717
JJ
74010. There is now a runtime configuration option "tcp_wrappers_daemon_name".
741 Setting this allows an admin to define which entry in the tcpwrappers
742 config file will be used to control access to the daemon. This option
743 is only available when Exim is built with USE_TCP_WRAPPERS. The
744 default value is set at build time using the TCP_WRAPPERS_DAEMON_NAME
745 build option.
746
79d4bc3d
PP
74711. [POSSIBLE CONFIG BREAKAGE] The default value for system_filter_user is now
748 the Exim run-time user, instead of root.
749
2cfd3221
PP
75012. [POSSIBLE CONFIG BREAKAGE] ALT_CONFIG_ROOT_ONLY is no longer optional and
751 is forced on. This is mitigated by the new build option
90b6341f 752 TRUSTED_CONFIG_LIST which defines a list of configuration files which
7f7f0545
DW
753 are trusted; one per line. If a config file is owned by root and matches
754 a pathname in the list, then it may be invoked by the Exim build-time
755 user without Exim relinquishing root privileges.
2cfd3221
PP
756
75713. [POSSIBLE CONFIG BREAKAGE] The Exim user is no longer automatically
758 trusted to supply -D<Macro[=Value]> overrides on the command-line. Going
90b6341f
DW
759 forward, we recommend using TRUSTED_CONFIG_LIST with shim configs that
760 include the main config. As a transition mechanism, we are temporarily
761 providing a work-around: the new build option WHITELIST_D_MACROS provides
43236f35 762 a colon-separated list of macro names which may be overridden by the Exim
90b6341f
DW
763 run-time user. The values of these macros are constrained to the regex
764 ^[A-Za-z0-9_/.-]*$ (which explicitly does allow for empty values).
2cfd3221 765
77bb000f 766
3fc596e4
NM
767Version 4.72
768------------
769
b26eacf1
PP
770 1. TWO SECURITY FIXES: one relating to mail-spools which are globally
771 writable, the other to locking of MBX folders (not mbox).
772
773 2. MySQL stored procedures are now supported.
774
775 3. The dkim_domain transport option is now a list, not a single string, and
776 messages will be signed for each element in the list (discarding
777 duplicates).
778
779 4. The 4.70 release unexpectedly changed the behaviour of dnsdb TXT lookups
780 in the presence of multiple character strings within the RR. Prior to 4.70,
781 only the first string would be returned. The dnsdb lookup now, by default,
782 preserves the pre-4.70 semantics, but also now takes an extended output
8f425947
PP
783 separator specification. The separator can be followed by a semicolon, to
784 concatenate the individual text strings together with no join character,
785 or by a comma and a second separator character, in which case the text
786 strings within a TXT record are joined on that second character.
787 Administrators are reminded that DNS provides no ordering guarantees
788 between multiple records in an RRset. For example:
b26eacf1
PP
789
790 foo.example. IN TXT "a" "b" "c"
791 foo.example. IN TXT "d" "e" "f"
792
793 ${lookup dnsdb{>/ txt=foo.example}} -> "a/d"
794 ${lookup dnsdb{>/; txt=foo.example}} -> "def/abc"
8f425947 795 ${lookup dnsdb{>/,+ txt=foo.example}} -> "a+b+c/d+e+f"
b26eacf1 796
3fc596e4 797
f33253cc
NM
798Version 4.70 / 4.71
799-------------------
65a7d8c3 800
7c6d71af 801 1. Native DKIM support without an external library.
a8c8d6b5
JJ
802 (Note that if no action to prevent it is taken, a straight upgrade will
803 result in DKIM verification of all signed incoming emails. See spec
804 for details on conditionally disabling)
7c6d71af
NM
805
806 2. Experimental DCC support via dccifd (contributed by Wolfgang Breyha).
65a7d8c3 807
f33253cc 808 3. There is now a bool{} expansion condition which maps certain strings to
7d9f747b 809 true/false condition values (most likely of use in conjunction with the
f33253cc
NM
810 and{} expansion operator).
811
812 4. The $spam_score, $spam_bar and $spam_report variables are now available
813 at delivery time.
814
815 5. exim -bP now supports "macros", "macro_list" or "macro MACRO_NAME" as
816 options, provided that Exim is invoked by an admin_user.
817
818 6. There is a new option gnutls_compat_mode, when linked against GnuTLS,
819 which increases compatibility with older clients at the cost of decreased
820 security. Don't set this unless you need to support such clients.
821
822 7. There is a new expansion operator, ${randint:...} which will produce a
823 "random" number less than the supplied integer. This randomness is
824 not guaranteed to be cryptographically strong, but depending upon how
825 Exim was built may be better than the most naive schemes.
826
827 8. Exim now explicitly ensures that SHA256 is available when linked against
828 OpenSSL.
829
830 9. The transport_filter_timeout option now applies to SMTP transports too.
831
65a7d8c3 832
7d9f747b
PP
833Version 4.69
834------------
835
836 1. Preliminary DKIM support in Experimental.
837
838
2b85bce7
PH
839Version 4.68
840------------
841
842 1. The body_linecount and body_zerocount C variables are now exported in the
843 local_scan API.
844
93655c46
PH
845 2. When a dnslists lookup succeeds, the key that was looked up is now placed
846 in $dnslist_matched. When the key is an IP address, it is not reversed in
847 this variable (though it is, of course, in the actual lookup). In simple
848 cases, for example:
849
850 deny dnslists = spamhaus.example
851
852 the key is also available in another variable (in this case,
853 $sender_host_address). In more complicated cases, however, this is not
854 true. For example, using a data lookup might generate a dnslists lookup
855 like this:
856
857 deny dnslists = spamhaus.example/<|192.168.1.2|192.168.6.7|...
858
859 If this condition succeeds, the value in $dnslist_matched might be
860 192.168.6.7 (for example).
861
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PH
862 3. Authenticators now have a client_condition option. When Exim is running as
863 a client, it skips an authenticator whose client_condition expansion yields
864 "0", "no", or "false". This can be used, for example, to skip plain text
865 authenticators when the connection is not encrypted by a setting such as:
866
867 client_condition = ${if !eq{$tls_cipher}{}}
868
869 Note that the 4.67 documentation states that $tls_cipher contains the
870 cipher used for incoming messages. In fact, during SMTP delivery, it
871 contains the cipher used for the delivery. The same is true for
872 $tls_peerdn.
873
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PH
874 4. There is now a -Mvc <message-id> option, which outputs a copy of the
875 message to the standard output, in RFC 2822 format. The option can be used
876 only by an admin user.
877
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PH
878 5. There is now a /noupdate option for the ratelimit ACL condition. It
879 computes the rate and checks the limit as normal, but it does not update
880 the saved data. This means that, in relevant ACLs, it is possible to lookup
881 the existence of a specified (or auto-generated) ratelimit key without
882 incrementing the ratelimit counter for that key.
883
884 In order for this to be useful, another ACL entry must set the rate
885 for the same key somewhere (otherwise it will always be zero).
886
887 Example:
888
889 acl_check_connect:
890 # Read the rate; if it doesn't exist or is below the maximum
891 # we update it below
892 deny ratelimit = 100 / 5m / strict / noupdate
893 log_message = RATE: $sender_rate / $sender_rate_period \
894 (max $sender_rate_limit)
895
896 [... some other logic and tests...]
897
898 warn ratelimit = 100 / 5m / strict / per_cmd
899 log_message = RATE UPDATE: $sender_rate / $sender_rate_period \
900 (max $sender_rate_limit)
901 condition = ${if le{$sender_rate}{$sender_rate_limit}}
902
903 accept
904
d677b2f2
PH
905 6. The variable $max_received_linelength contains the number of bytes in the
906 longest line that was received as part of the message, not counting the
907 line termination character(s).
908
d52120f2
PH
909 7. Host lists can now include +ignore_defer and +include_defer, analagous to
910 +ignore_unknown and +include_unknown. These options should be used with
911 care, probably only in non-critical host lists such as whitelists.
912
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PH
913 8. There's a new option called queue_only_load_latch, which defaults true.
914 If set false when queue_only_load is greater than zero, Exim re-evaluates
915 the load for each incoming message in an SMTP session. Otherwise, once one
916 message is queued, the remainder are also.
917
4f054c63 918 9. There is a new ACL, specified by acl_smtp_notquit, which is run in most
8f128379
PH
919 cases when an SMTP session ends without sending QUIT. However, when Exim
920 itself is is bad trouble, such as being unable to write to its log files,
921 this ACL is not run, because it might try to do things (such as write to
922 log files) that make the situation even worse.
923
924 Like the QUIT ACL, this new ACL is provided to make it possible to gather
925 statistics. Whatever it returns (accept or deny) is immaterial. The "delay"
926 modifier is forbidden in this ACL.
927
928 When the NOTQUIT ACL is running, the variable $smtp_notquit_reason is set
929 to a string that indicates the reason for the termination of the SMTP
930 connection. The possible values are:
931
932 acl-drop Another ACL issued a "drop" command
933 bad-commands Too many unknown or non-mail commands
934 command-timeout Timeout while reading SMTP commands
935 connection-lost The SMTP connection has been lost
936 data-timeout Timeout while reading message data
937 local-scan-error The local_scan() function crashed
938 local-scan-timeout The local_scan() function timed out
939 signal-exit SIGTERM or SIGINT
940 synchronization-error SMTP synchronization error
941 tls-failed TLS failed to start
942
943 In most cases when an SMTP connection is closed without having received
944 QUIT, Exim sends an SMTP response message before actually closing the
945 connection. With the exception of acl-drop, the default message can be
946 overridden by the "message" modifier in the NOTQUIT ACL. In the case of a
947 "drop" verb in another ACL, it is the message from the other ACL that is
948 used.
949
b7670459
PH
95010. For MySQL and PostgreSQL lookups, it is now possible to specify a list of
951 servers with individual queries. This is done by starting the query with
952 "servers=x:y:z;", where each item in the list may take one of two forms:
953
954 (1) If it is just a host name, the appropriate global option (mysql_servers
955 or pgsql_servers) is searched for a host of the same name, and the
956 remaining parameters (database, user, password) are taken from there.
957
958 (2) If it contains any slashes, it is taken as a complete parameter set.
959
960 The list of servers is used in exactly the same was as the global list.
961 Once a connection to a server has happened and a query has been
962 successfully executed, processing of the lookup ceases.
963
964 This feature is intended for use in master/slave situations where updates
965 are occurring, and one wants to update a master rather than a slave. If the
966 masters are in the list for reading, you might have:
967
968 mysql_servers = slave1/db/name/pw:slave2/db/name/pw:master/db/name/pw
969
970 In an updating lookup, you could then write
971
972 ${lookup mysql{servers=master; UPDATE ...}
973
974 If, on the other hand, the master is not to be used for reading lookups:
975
976 pgsql_servers = slave1/db/name/pw:slave2/db/name/pw
977
978 you can still update the master by
979
980 ${lookup pgsql{servers=master/db/name/pw; UPDATE ...}
981
ddea74fa
PH
98211. The message_body_newlines option (default FALSE, for backwards
983 compatibility) can be used to control whether newlines are present in
984 $message_body and $message_body_end. If it is FALSE, they are replaced by
985 spaces.
986
2b85bce7 987
b4ed4da0
PH
988Version 4.67
989------------
990
991 1. There is a new log selector called smtp_no_mail, which is not included in
992 the default setting. When it is set, a line is written to the main log
993 whenever an accepted SMTP connection terminates without having issued a
4aa45c31 994 MAIL command.
b4ed4da0 995
431b7361 996 2. When an item in a dnslists list is followed by = and & and a list of IP
4aa45c31
PH
997 addresses, the behaviour was not clear when the lookup returned more than
998 one IP address. This has been solved by the addition of == and =& for "all"
93655c46 999 rather than the default "any" matching.
431b7361 1000
4aa45c31
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1001 3. Up till now, the only control over which cipher suites GnuTLS uses has been
1002 for the cipher algorithms. New options have been added to allow some of the
1003 other parameters to be varied.
431b7361 1004
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1005 4. There is a new compile-time option called ENABLE_DISABLE_FSYNC. When it is
1006 set, Exim compiles a runtime option called disable_fsync.
431b7361 1007
4aa45c31 1008 5. There is a new variable called $smtp_count_at_connection_start.
431b7361 1009
4aa45c31 1010 6. There's a new control called no_pipelining.
cf8b11a5 1011
41c7c167 1012 7. There are two new variables called $sending_ip_address and $sending_port.
4aa45c31 1013 These are set whenever an SMTP connection to another host has been set up.
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1014
1015 8. The expansion of the helo_data option in the smtp transport now happens
4aa45c31 1016 after the connection to the server has been made.
41c7c167 1017
9c57cbc0 1018 9. There is a new expansion operator ${rfc2047d: that decodes strings that
4aa45c31 1019 are encoded as per RFC 2047.
9c57cbc0 1020
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102110. There is a new log selector called "pid", which causes the current process
1022 id to be added to every log line, in square brackets, immediately after the
1023 time and date.
1024
047bdd8c 102511. Exim has been modified so that it flushes SMTP output before implementing
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1026 a delay in an ACL. It also flushes the output before performing a callout,
1027 as this can take a substantial time. These behaviours can be disabled by
1028 obeying control = no_delay_flush or control = no_callout_flush,
4aa45c31 1029 respectively, at some earlier stage of the connection.
047bdd8c 1030
0ce9abe6 103112. There are two new expansion conditions that iterate over a list. They are
4aa45c31 1032 called forany and forall.
0ce9abe6 1033
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103413. There's a new global option called dsn_from that can be used to vary the
1035 contents of From: lines in bounces and other automatically generated
1036 messages ("delivery status notifications" - hence the name of the option).
0e22dfd1 1037
4aa45c31 103814. The smtp transport has a new option called hosts_avoid_pipelining.
c51b8e75 1039
75b1493f 104015. By default, exigrep does case-insensitive matches. There is now a -I option
4aa45c31 1041 that makes it case-sensitive.
29f89cad 1042
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104316. A number of new features ("addresses", "map", "filter", and "reduce") have
1044 been added to string expansions to make it easier to process lists of
1045 items, typically addresses.
29f89cad 1046
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104717. There's a new ACL modifier called "continue". It does nothing of itself,
1048 and processing of the ACL always continues with the next condition or
1049 modifier. It is provided so that the side effects of expanding its argument
4aa45c31 1050 can be used.
c3611384 1051
ec95d1a6 105218. It is now possible to use newline and other control characters (those with
4aa45c31 1053 values less than 32, plus DEL) as separators in lists.
ec95d1a6 1054
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105519. The exigrep utility now has a -v option, which inverts the matching
1056 condition.
1057
c456d9bb 105820. The host_find_failed option in the manualroute router can now be set to
4aa45c31 1059 "ignore".
c456d9bb 1060
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1061
1062Version 4.66
1063------------
1064
1065No new features were added to 4.66.
1066
1067
1068Version 4.65
1069------------
1070
1071No new features were added to 4.65.
1072
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1073
1074Version 4.64
1075------------
1076
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1077 1. ACL variables can now be given arbitrary names, as long as they start with
1078 "acl_c" or "acl_m" (for connection variables and message variables), are at
1079 least six characters long, with the sixth character being either a digit or
883335dc 1080 an underscore.
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1081
1082 2. There is a new ACL modifier called log_reject_target. It makes it possible
883335dc 1083 to specify which logs are used for messages about ACL rejections.
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1084
1085 3. There is a new authenticator called "dovecot". This is an interface to the
1086 authentication facility of the Dovecot POP/IMAP server, which can support a
883335dc 1087 number of authentication methods.
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1088
1089 4. The variable $message_headers_raw provides a concatenation of all the
1090 messages's headers without any decoding. This is in contrast to
1091 $message_headers, which does RFC2047 decoding on the header contents.
1092
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1093 5. In a DNS black list, if two domain names, comma-separated, are given, the
1094 second is used first to do an initial check, making use of any IP value
1095 restrictions that are set. If there is a match, the first domain is used,
1096 without any IP value restrictions, to get the TXT record.
af561417 1097
883335dc 1098 6. All authenticators now have a server_condition option.
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1099
1100 7. There is a new command-line option called -Mset. It is useful only in
1101 conjunction with -be (that is, when testing string expansions). It must be
1102 followed by a message id; Exim loads the given message from its spool
883335dc 1103 before doing the expansions.
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1104
1105 8. Another similar new command-line option is called -bem. It operates like
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1106 -be except that it must be followed by the name of a file that contains a
1107 message.
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1108
1109 9. When an address is delayed because of a 4xx response to a RCPT command, it
1110 is now the combination of sender and recipient that is delayed in
883335dc 1111 subsequent queue runs until its retry time is reached.
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1112
111310. Unary negation and the bitwise logical operators and, or, xor, not, and
883335dc 1114 shift, have been added to the eval: and eval10: expansion items.
48c7f9e2 1115
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111611. The variables $interface_address and $interface_port have been renamed
1117 as $received_ip_address and $received_port, to make it clear that they
1118 relate to message reception rather than delivery. (The old names remain
1119 available for compatibility.)
1120
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112112. The "message" modifier can now be used on "accept" and "discard" acl verbs
1122 to vary the message that is sent when an SMTP command is accepted.
4e88a19f 1123
495ae4b0 1124
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1125Version 4.63
1126------------
1127
11281. There is a new Boolean option called filter_prepend_home for the redirect
38a0a95f 1129 router.
4608d683 1130
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11312. There is a new acl, set by acl_not_smtp_start, which is run right at the
1132 start of receiving a non-SMTP message, before any of the message has been
38a0a95f 1133 read.
45b91596 1134
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11353. When an SMTP error message is specified in a "message" modifier in an ACL,
1136 or in a :fail: or :defer: message in a redirect router, Exim now checks the
38a0a95f 1137 start of the message for an SMTP error code.
a5bd321b 1138
6ec97b1b 11394. There is a new parameter for LDAP lookups called "referrals", which takes
38a0a95f 1140 one of the settings "follow" (the default) or "nofollow".
6ec97b1b 1141
e22ca4ac
JJ
11425. Version 20070721.2 of exipick now included, offering these new options:
1143 --reverse
1144 After all other sorting options have bee processed, reverse order
1145 before displaying messages (-R is synonym).
1146 --random
1147 Randomize order of matching messages before displaying.
1148 --size
1149 Instead of displaying the matching messages, display the sum
1150 of their sizes.
1151 --sort <variable>[,<variable>...]
1152 Before displaying matching messages, sort the messages according to
1153 each messages value for each variable.
1154 --not
1155 Negate the value for every test (returns inverse output from the
1156 same criteria without --not).
1157
4608d683 1158
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1159Version 4.62
1160------------
1161
11621. The ${readsocket expansion item now supports Internet domain sockets as well
1163 as Unix domain sockets. If the first argument begins "inet:", it must be of
1164 the form "inet:host:port". The port is mandatory; it may be a number or the
1165 name of a TCP port in /etc/services. The host may be a name, or it may be an
1166 IP address. An ip address may optionally be enclosed in square brackets.
1167 This is best for IPv6 addresses. For example:
1168
1169 ${readsocket{inet:[::1]:1234}{<request data>}...
1170
1171 Only a single host name may be given, but if looking it up yield more than
1172 one IP address, they are each tried in turn until a connection is made. Once
1173 a connection has been made, the behaviour is as for ${readsocket with a Unix
1174 domain socket.
1175
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11762. If a redirect router sets up file or pipe deliveries for more than one
1177 incoming address, and the relevant transport has batch_max set greater than
1178 one, a batch delivery now occurs.
1179
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11803. The appendfile transport has a new option called maildirfolder_create_regex.
1181 Its value is a regular expression. For a maildir delivery, this is matched
1182 against the maildir directory; if it matches, Exim ensures that a
1183 maildirfolder file is created alongside the new, cur, and tmp directories.
1184
1cce3af8 1185
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1186Version 4.61
1187------------
1188
4f578862
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1189The documentation is up-to-date for the 4.61 release. Major new features since
1190the 4.60 release are:
1191
1192. An option called disable_ipv6, to disable the use of IPv6 completely.
1193
1194. An increase in the number of ACL variables to 20 of each type.
1195
1196. A change to use $auth1, $auth2, and $auth3 in authenticators instead of $1,
1197 $2, $3, (though those are still set) because the numeric variables get used
1198 for other things in complicated expansions.
1199
843a41e8 1200. The default for rfc1413_query_timeout has been changed from 30s to 5s.
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1201
1202. It is possible to use setclassresources() on some BSD OS to control the
1203 resources used in pipe deliveries.
1204
1205. A new ACL modifier called add_header, which can be used with any verb.
1206
1207. More errors are detectable in retry rules.
1208
1209There are a number of other additions too.
71fafd95 1210
7e66e54d 1211
425ae40f 1212Version 4.60
b5aea5e1
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1213------------
1214
425ae40f
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1215The documentation is up-to-date for the 4.60 release. Major new features since
1216the 4.50 release are:
1a46a8c5 1217
425ae40f 1218. Support for SQLite.
1a46a8c5 1219
425ae40f 1220. Support for IGNOREQUOTA in LMTP.
1a46a8c5 1221
425ae40f 1222. Extensions to the "submission mode" features.
1a46a8c5 1223
425ae40f 1224. Support for Client SMTP Authorization (CSA).
1a46a8c5 1225
425ae40f 1226. Support for ratelimiting hosts and users.
b5aea5e1 1227
425ae40f 1228. New expansion items to help with the BATV "prvs" scheme.
b5aea5e1 1229
425ae40f 1230. A "match_ip" condition, that matches an IP address against a list.
35edf2ff 1231
425ae40f 1232There are many more minor changes.
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1233
1234****