Expansions: new ${authresults {mch}} for an Authentication-Results header
[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
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4412. Expansion item ${authresults {<machine>}} for creating an
45 Authentication-Results: header.
46
47195144 47
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48Version 4.90
49------------
50
51 1. PKG_CONFIG_PATH can now be set in Local/Makefile;
52 wildcards will be expanded, values are collapsed.
53
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54 2. The ${readsocket } expansion now takes an option to not shutdown the
55 connection after sending the query string. The default remains to do so.
56
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57 3. An smtp transport option "hosts_noproxy_tls" to control whether multiple
58 deliveries on a single TCP connection can maintain a TLS connection
59 open. By default disabled for all hosts, doing so saves the cost of
60 making new TLS sessions, at the cost of having to proxy the data via
61 another process. Logging is also affected.
62
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63 4. A malware connection type for the FPSCAND protocol.
64
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65 5. An option for recipient verify callouts to hold the connection open for
66 further recipients and for delivery.
67
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68 6. The reproducible build $SOURCE_DATE_EPOCH environment variable is now
69 supported.
70
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71 7. Optionally, an alternate format for spool data-files which matches the
72 wire format - meaning more efficient reception and transmission (at the
73 cost of difficulty with standard Unix tools). Only used for messages
74 received using the ESMTP CHUNKING option, and when a new main-section
75 option "spool_wireformat" (false by default) is set.
76
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77 8. New main configuration option "commandline_checks_require_admin" to
78 restrict who can use various introspection options.
79
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80 9. New option modifier "no_check" for quota and quota_filecount
81 appendfile transport.
82
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8310. Variable $smtp_command_history returning a comma-sep list of recent
84 SMTP commands.
85
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8611. Millisecond timetamps in logs, on log_selector "millisec". Also affects
87 log elements QT, DT and D, and timstamps in debug output.
571b2715 88
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8912. TCP Fast Open logging. As a server, logs when the SMTP banner was sent
90 while still in SYN_RECV state; as a client logs when the connection
4a5cbaff 91 is opened with a TFO cookie.
a2673768 92
9e70917d 9313. DKIM support for multiple signing, by domain and/or key-selector.
7c6ec81b 94 DKIM support for multiple hashes, and for alternate-identity tags.
970424a5 95 Builtin macro with default list of signed headers.
484cc1a9 96 Better syntax for specifying oversigning.
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97 The DKIM ACL can override verification status, and status is visible in
98 the data ACL.
d73e45df 99
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10014. Exipick understands -C|--config for an alternative Exim
101 configuration file.
102
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10315. TCP Fast Open used, with data-on-SYN, for client SMTP via SOCKS5 proxy,
104 for ${readsocket } expansions, and for ClamAV.
105
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10616. The "-be" expansion test mode now supports macros. Macros are expanded
107 in test lines, and new macros can be defined.
108
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10917. Support for server-side dual-certificate-stacks (eg. RSA + ECDSA).
110
856d1e16 111
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112Version 4.89
113------------
114
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115 1. Allow relative config file names for ".include"
116
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117 2. A main-section config option "debug_store" to control the checks on
118 variable locations during store-reset. Normally false but can be enabled
119 when a memory corrution issue is suspected on a production system.
120
fd047340 121
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122Version 4.88
123------------
124
fc16abb4 125 1. The new perl_taintmode option allows to run the embedded perl
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126 interpreter in taint mode.
127
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128 2. New log_selector: dnssec, adds a "DS" tag to acceptance and delivery lines.
129
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130 3. Speculative debugging, via a "kill" option to the "control=debug" ACL
131 modifier.
132
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133 4. New expansion item ${sha3:<string>} / ${sha3_<N>:<string>}.
134 N can be 224, 256 (default), 384, 512.
135 With GnuTLS 3.5.0 or later, only.
136
f59aaaaa 137 5. Facility for named queues: A command-line argument can specify
55e70e76 138 the queue name for a queue operation, and an ACL modifier can set
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139 the queue to be used for a message. A $queue_name variable gives
140 visibility.
28b3821f 141
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142 6. New expansion operators base32/base32d.
143
44bc8f0c 144 7. The CHUNKING ESMTP extension from RFC 3030. May give some slight
7e3ce68e 145 performance increase and network load decrease. Main config option
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146 chunking_advertise_hosts, and smtp transport option hosts_try_chunking
147 for control.
7e3ce68e 148
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149 8. LMDB lookup support, as Experimental. Patch supplied by Andrew Colin Kissa.
150
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151 9. Expansion operator escape8bit, like escape but not touching newline etc..
152
fbbd45ff 15310. Feature macros, generated from compile options. All start with "_HAVE_"
4945f557 154 and go on with some roughly recognisable name. Driver macros, for
383832ef 155 router, transport and authentication drivers; names starting with "_DRIVER_".
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156 Option macros, for each configuration-file option; all start with "_OPT_".
157 Use the "-bP macros" command-line option to see what is present.
fbbd45ff 158
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15911. Integer values for options can take a "G" multiplier.
160
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16112. defer=pass option for the ACL control cutthrough_delivery, to reflect 4xx
162 returns from the target back to the initiator, rather than spooling the
163 message.
164
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16513. New built-in constants available for tls_dhparam and default changed.
166
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16714. If built with EXPERIMENTAL_QUEUEFILE, a queuefile transport, for writing
168 out copies of the message spool files for use by 3rd-party scanners.
169
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17015. A new option on the smtp transport, hosts_try_fastopen. If the system
171 supports it (on Linux it must be enabled in the kernel by the sysadmin)
172 try to use RFC 7413 "TCP Fast Open". No data is sent on the SYN segment
173 but it permits a peer that also supports the facility to send its SMTP
174 banner immediately after the SYN,ACK segment rather then waiting for
175 another ACK - so saving up to one roundtrip time. Because it requires
176 previous communication with the peer (we save a cookie from it) this
f59aaaaa 177 will only become active on frequently-contacted destinations.
fb05276a 178
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17916. A new syslog_pid option to suppress PID duplication in syslog lines.
180
8d042305 181
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182Version 4.87
183------------
184
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185 1. The ACL conditions regex and mime_regex now capture substrings
186 into numeric variables $regex1 to 9, like the "match" expansion condition.
187
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188 2. New $callout_address variable records the address used for a spam=,
189 malware= or verify= callout.
190
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191 3. Transports now take a "max_parallel" option, to limit concurrency.
192
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193 4. Expansion operators ${ipv6norm:<string>} and ${ipv6denorm:<string>}.
194 The latter expands to a 8-element colon-sep set of hex digits including
195 leading zeroes. A trailing ipv4-style dotted-decimal set is converted
196 to hex. Pure ipv4 addresses are converted to IPv4-mapped IPv6.
197 The former operator strips leading zeroes and collapses the longest
198 set of 0-groups to a double-colon.
199
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200 5. New "-bP config" support, to dump the effective configuration.
201
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202 6. New $dkim_key_length variable.
203
9aa35e9c 204 7. New base64d and base64 expansion items (the existing str2b64 being a
59b87190 205 synonym of the latter). Add support in base64 for certificates.
9aa35e9c 206
62b7cd08 207 8. New main configuration option "bounce_return_linesize_limit" to
f59aaaaa 208 avoid oversize bodies in bounces. The default value matches RFC
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209 limits.
210
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211 9. New $initial_cwd expansion variable.
212
0d9b78be 213
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214Version 4.86
215------------
216
217 1. Support for using the system standard CA bundle.
218
219 2. New expansion items $config_file, $config_dir, containing the file
220 and directory name of the main configuration file. Also $exim_version.
221
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222 3. New "malware=" support for Avast.
223
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224 4. New "spam=" variant option for Rspamd.
225
226 5. Assorted options on malware= and spam= scanners.
227
f59aaaaa 228 6. A command-line option to write a comment into the logfile.
cc00f4af 229
7eb6c37c 230 7. If built with EXPERIMENTAL_SOCKS feature enabled, the smtp transport can
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231 be configured to make connections via socks5 proxies.
232
233 8. If built with EXPERIMENTAL_INTERNATIONAL, support is included for
234 the transmission of UTF-8 envelope addresses.
7eb6c37c 235
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236 9. If built with EXPERIMENTAL_INTERNATIONAL, an expansion item for a commonly
237 used encoding of Maildir folder names.
238
b3ef41c9 23910. A logging option for slow DNS lookups.
846430d9 240
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24111. New ${env {<variable>}} expansion.
242
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24312. A non-SMTP authenticator using information from TLS client certificates.
244
10ca4f1c 24513. Main option "tls_eccurve" for selecting an Elliptic Curve for TLS.
65463bc9 246 Patch originally by Wolfgang Breyha.
10ca4f1c 247
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24814. Main option "dns_trust_aa" for trusting your local nameserver at the
249 same level as DNSSEC.
250
7eb6c37c 251
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252Version 4.85
253------------
254
255 1. If built with EXPERIMENTAL_DANE feature enabled, Exim will follow the
f59aaaaa 256 DANE SMTP draft to assess a secure chain of trust of the certificate
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257 used to establish the TLS connection based on a TLSA record in the
258 domain of the sender.
259
260 2. The EXPERIMENTAL_TPDA feature has been renamed to EXPERIMENTAL_EVENT
261 and several new events have been created. The reason is because it has
262 been expanded beyond just firing events during the transport phase. Any
263 existing TPDA transport options will have to be rewritten to use a new
264 $event_name expansion variable in a condition. Refer to the
265 experimental-spec.txt for details and examples.
266
267 3. The EXPERIMENTAL_CERTNAMES features is an enhancement to verify that
268 server certs used for TLS match the result of the MX lookup. It does
269 not use the same mechanism as DANE.
270
271
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272Version 4.84
273------------
274
275
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276Version 4.83
277------------
278
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279 1. If built with the EXPERIMENTAL_PROXY feature enabled, Exim can be
280 configured to expect an initial header from a proxy that will make the
281 actual external source IP:host be used in exim instead of the IP of the
282 proxy that is connecting to it.
283
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284 2. New verify option header_names_ascii, which will check to make sure
285 there are no non-ASCII characters in header names. Exim itself handles
286 those non-ASCII characters, but downstream apps may not, so Exim can
287 detect and reject if those characters are present.
288
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289 3. New expansion operator ${utf8clean:string} to replace malformed UTF8
290 codepoints with valid ones.
291
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292 4. New malware type "sock". Talks over a Unix or TCP socket, sending one
293 command line and matching a regex against the return data for trigger
007a2dee 294 and a second regex to extract malware_name. The mail spoolfile name can
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295 be included in the command line.
296
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297 5. The smtp transport now supports options "tls_verify_hosts" and
298 "tls_try_verify_hosts". If either is set the certificate verification
299 is split from the encryption operation. The default remains that a failed
300 verification cancels the encryption.
214042d2 301
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302 6. New SERVERS override of default ldap server list. In the ACLs, an ldap
303 lookup can now set a list of servers to use that is different from the
304 default list.
305
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306 7. New command-line option -C for exiqgrep to specify alternate exim.conf
307 file when searching the queue.
308
f2de3a33 309 8. OCSP now supports GnuTLS also, if you have version 3.1.3 or later of that.
2b4a568d 310
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311 9. Support for DNSSEC on outbound connections.
312
9d1c15ef 31310. New variables "tls_(in,out)_(our,peer)cert" and expansion item
6a8a60e0 314 "certextract" to extract fields from them. Hash operators md5 and sha1
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315 work over them for generating fingerprints, and a new sha256 operator
316 for them added.
9d1c15ef 317
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31811. PRDR is now supported dy default.
319
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32012. OCSP stapling is now supported by default.
321
32213. If built with the EXPERIMENTAL_DSN feature enabled, Exim will output
4c04137d 323 Delivery Status Notification messages in MIME format, and negotiate
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324 DSN features per RFC 3461.
325
6ece2e77 326
2c422e6f 327Version 4.82
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328------------
329
330 1. New command-line option -bI:sieve will list all supported sieve extensions
331 of this Exim build on standard output, one per line.
332 ManageSieve (RFC 5804) providers managing scripts for use by Exim should
333 query this to establish the correct list to include in the protocol's
334 SIEVE capability line.
335
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336 2. If the -n option is combined with the -bP option, then the name of an
337 emitted option is not output, only the value (if visible to you).
338 For instance, "exim -n -bP pid_file_path" should just emit a pathname
339 followed by a newline, and no other text.
340
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341 3. When built with SUPPORT_TLS and USE_GNUTLS, the SMTP transport driver now
342 has a "tls_dh_min_bits" option, to set the minimum acceptable number of
343 bits in the Diffie-Hellman prime offered by a server (in DH ciphersuites)
344 acceptable for security. (Option accepted but ignored if using OpenSSL).
345 Defaults to 1024, the old value. May be lowered only to 512, or raised as
346 far as you like. Raising this may hinder TLS interoperability with other
347 sites and is not currently recommended. Lowering this will permit you to
348 establish a TLS session which is not as secure as you might like.
349
350 Unless you really know what you are doing, leave it alone.
351
1f4a55da 352 4. If not built with DISABLE_DNSSEC, Exim now has the main option
0fbd9bff 353 dns_dnssec_ok; if set to 1 then Exim will initialise the resolver library
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354 to send the DO flag to your recursive resolver. If you have a recursive
355 resolver, which can set the Authenticated Data (AD) flag in results, Exim
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356 can now detect this. Exim does not perform validation itself, instead
357 relying upon a trusted path to the resolver.
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358
359 Current status: work-in-progress; $sender_host_dnssec variable added.
360
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361 5. DSCP support for outbound connections: on a transport using the smtp driver,
362 set "dscp = ef", for instance, to cause the connections to have the relevant
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363 DSCP (IPv4 TOS or IPv6 TCLASS) value in the header.
364
365 Similarly for inbound connections, there is a new control modifier, dscp,
366 so "warn control = dscp/ef" in the connect ACL, or after authentication.
367
368 Supported values depend upon system libraries. "exim -bI:dscp" to list the
369 ones Exim knows of. You can also set a raw number 0..0x3F.
36a3ae5f 370
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371 6. The -G command-line flag is no longer ignored; it is now equivalent to an
372 ACL setting "control = suppress_local_fixups". The -L command-line flag
373 is now accepted and forces use of syslog, with the provided tag as the
374 process name. A few other flags used by Sendmail are now accepted and
375 ignored.
376
976b7e9f 377 7. New cutthrough routing feature. Requested by a "control = cutthrough_delivery"
4c04137d 378 ACL modifier; works for single-recipient mails which are received on and
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379 deliverable via SMTP. Using the connection made for a recipient verify,
380 if requested before the verify, or a new one made for the purpose while
381 the inbound connection is still active. The bulk of the mail item is copied
382 direct from the inbound socket to the outbound (as well as the spool file).
383 When the source notifies the end of data, the data acceptance by the destination
4c04137d 384 is negotiated before the acceptance is sent to the source. If the destination
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385 does not accept the mail item, for example due to content-scanning, the item
386 is not accepted from the source and therefore there is no need to generate
387 a bounce mail. This is of benefit when providing a secondary-MX service.
388 The downside is that delays are under the control of the ultimate destination
389 system not your own.
390
4c04137d 391 The Received-by: header on items delivered by cutthrough is generated
042eb971 392 early in reception rather than at the end; this will affect any timestamp
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393 included. The log line showing delivery is recorded before that showing
394 reception; it uses a new ">>" tag instead of "=>".
06a6f4ed 395
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396 To support the feature, verify-callout connections can now use ESMTP and TLS.
397 The usual smtp transport options are honoured, plus a (new, default everything)
398 hosts_verify_avoid_tls.
399
400 New variable families named tls_in_cipher, tls_out_cipher etc. are introduced
401 for specific access to the information for each connection. The old names
402 are present for now but deprecated.
403
fcc8e047 404 Not yet supported: IGNOREQUOTA, SIZE, PIPELINING.
976b7e9f 405
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406 8. New expansion operators ${listnamed:name} to get the content of a named list
407 and ${listcount:string} to count the items in a list.
98a90c36 408
2519e60d 409 9. New global option "gnutls_allow_auto_pkcs11", defaults false. The GnuTLS
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410 rewrite in 4.80 combines with GnuTLS 2.12.0 or later, to autoload PKCS11
411 modules. For some situations this is desirable, but we expect admin in
412 those situations to know they want the feature. More commonly, it means
413 that GUI user modules get loaded and are broken by the setuid Exim being
414 unable to access files specified in environment variables and passed
415 through, thus breakage. So we explicitly inhibit the PKCS11 initialisation
416 unless this new option is set.
417
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418 Some older OS's with earlier versions of GnuTLS might not have pkcs11 ability,
419 so have also added a build option which can be used to build Exim with GnuTLS
420 but without trying to use any kind of PKCS11 support. Uncomment this in the
421 Local/Makefile:
422
423 AVOID_GNUTLS_PKCS11=yes
424
3e8abda0 42510. The "acl = name" condition on an ACL now supports optional arguments.
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426 New expansion item "${acl {name}{arg}...}" and expansion condition
427 "acl {{name}{arg}...}" are added. In all cases up to nine arguments
428 can be used, appearing in $acl_arg1 to $acl_arg9 for the called ACL.
429 Variable $acl_narg contains the number of arguments. If the ACL sets
430 a "message =" value this becomes the result of the expansion item,
431 or the value of $value for the expansion condition. If the ACL returns
432 accept the expansion condition is true; if reject, false. A defer
433 return results in a forced fail.
a5f239e4 434
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43511. Routers and transports can now have multiple headers_add and headers_remove
436 option lines. The concatenated list is used.
437
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43812. New ACL modifier "remove_header" can remove headers before message gets
439 handled by routers/transports.
440
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44113. New dnsdb lookup pseudo-type "a+". A sequence of "a6" (if configured),
442 "aaaa" and "a" lookups is done and the full set of results returned.
443
362145b5 44414. New expansion variable $headers_added with content from ACL add_header
85ffcba6 445 modifier (but not yet added to message).
362145b5 446
bd0fff00 44715. New 8bitmime status logging option for received messages. Log field "M8S".
3c0a92dc 448
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44916. New authenticated_sender logging option, adding to log field "A".
450
181d9bf8 45117. New expansion variables $router_name and $transport_name. Useful
f59aaaaa 452 particularly for debug_print as -bt command-line option does not
2a47f028 453 require privilege whereas -d does.
181d9bf8 454
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45518. If built with EXPERIMENTAL_PRDR, per-recipient data responses per a
456 proposed extension to SMTP from Eric Hall.
457
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45819. The pipe transport has gained the force_command option, to allow
459 decorating commands from user .forward pipe aliases with prefix
460 wrappers, for instance.
461
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46220. Callout connections can now AUTH; the same controls as normal delivery
463 connections apply.
464
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46521. Support for DMARC, using opendmarc libs, can be enabled. It adds new
466 options: dmarc_forensic_sender, dmarc_history_file, and dmarc_tld_file.
467 It adds new expansion variables $dmarc_ar_header, $dmarc_status,
468 $dmarc_status_text, and $dmarc_used_domain. It adds a new acl modifier
469 dmarc_status. It adds new control flags dmarc_disable_verify and
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470 dmarc_enable_forensic. The default for the dmarc_tld_file option is
471 "/etc/exim/opendmarc.tlds" and can be changed via EDITME.
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472
47322. Add expansion variable $authenticated_fail_id, which is the username
474 provided to the authentication method which failed. It is available
475 for use in subsequent ACL processing (typically quit or notquit ACLs).
476
4c04137d 47723. New ACL modifier "udpsend" can construct a UDP packet to send to a given
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478 UDP host and port.
479
48024. New ${hexquote:..string..} expansion operator converts non-printable
481 characters in the string to \xNN form.
482
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48325. Experimental TPDA (Transport Post Delivery Action) function added.
484 Patch provided by Axel Rau.
485
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48626. Experimental Redis lookup added. Patch provided by Warren Baker.
487
181d9bf8 488
b1770b6e 489Version 4.80
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490------------
491
492 1. New authenticator driver, "gsasl". Server-only (at present).
493 This is a SASL interface, licensed under GPL, which can be found at
494 http://www.gnu.org/software/gsasl/.
495 This system does not provide sources of data for authentication, so
3b4f55a3 496 careful use needs to be made of the conditions in Exim.
c1e794ba 497
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498 2. New authenticator driver, "heimdal_gssapi". Server-only.
499 A replacement for using cyrus_sasl with Heimdal, now that $KRB5_KTNAME
500 is no longer honoured for setuid programs by Heimdal. Use the
501 "server_keytab" option to point to the keytab.
502
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503 3. The "pkg-config" system can now be used when building Exim to reference
504 cflags and library information for lookups and authenticators, rather
505 than having to update "CFLAGS", "AUTH_LIBS", "LOOKUP_INCLUDE" and
7e6a8985
PP
506 "LOOKUP_LIBS" directly. Similarly for handling the TLS library support
507 without adjusting "TLS_INCLUDE" and "TLS_LIBS".
252e0c7b 508
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509 In addition, setting PCRE_CONFIG=yes will query the pcre-config tool to
510 find the headers and libraries for PCRE.
511
f1e05cc7 512 4. New expansion variable $tls_bits.
20aa9dbd 513
4a6a987a
PP
514 5. New lookup type, "dbmjz". Key is an Exim list, the elements of which will
515 be joined together with ASCII NUL characters to construct the key to pass
3b4f55a3
PP
516 into the DBM library. Can be used with gsasl to access sasldb2 files as
517 used by Cyrus SASL.
4a6a987a 518
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519 6. OpenSSL now supports TLS1.1 and TLS1.2 with OpenSSL 1.0.1.
520
521 Avoid release 1.0.1a if you can. Note that the default value of
522 "openssl_options" is no longer "+dont_insert_empty_fragments", as that
523 increased susceptibility to attack. This may still have interoperability
524 implications for very old clients (see version 4.31 change 37) but
525 administrators can choose to make the trade-off themselves and restore
526 compatibility at the cost of session security.
527
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528 7. Use of the new expansion variable $tls_sni in the main configuration option
529 tls_certificate will cause Exim to re-expand the option, if the client
530 sends the TLS Server Name Indication extension, to permit choosing a
531 different certificate; tls_privatekey will also be re-expanded. You must
532 still set these options to expand to valid files when $tls_sni is not set.
3f0945ff
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533
534 The SMTP Transport has gained the option tls_sni, which will set a hostname
535 for outbound TLS sessions, and set $tls_sni too.
536
537 A new log_selector, +tls_sni, has been added, to log received SNI values
538 for Exim as a server.
539
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540 8. The existing "accept_8bitmime" option now defaults to true. This means
541 that Exim is deliberately not strictly RFC compliant. We're following
542 Dan Bernstein's advice in http://cr.yp.to/smtp/8bitmime.html by default.
543 Those who disagree, or know that they are talking to mail servers that,
544 even today, are not 8-bit clean, need to turn off this option.
545
9ee44efb
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546 9. Exim can now be started with -bw (with an optional timeout, given as
547 -bw<timespec>). With this, stdin at startup is a socket that is
548 already listening for connections. This has a more modern name of
549 "socket activation", but forcing the activated socket to fd 0. We're
550 interested in adding more support for modern variants.
551
eae0036b 55210. ${eval } now uses 64-bit values on supporting platforms. A new "G" suffix
97d17305
JH
553 for numbers indicates multiplication by 1024^3.
554
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55511. The GnuTLS support has been revamped; the three options gnutls_require_kx,
556 gnutls_require_mac & gnutls_require_protocols are no longer supported.
557 tls_require_ciphers is now parsed by gnutls_priority_init(3) as a priority
558 string, documentation for which is at:
42bfef1e 559 http://www.gnutls.org/manual/html_node/Priority-Strings.html
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560
561 SNI support has been added to Exim's GnuTLS integration too.
562
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563 For sufficiently recent GnuTLS libraries, ${randint:..} will now use
564 gnutls_rnd(), asking for GNUTLS_RND_NONCE level randomness.
565
53947857 56612. With OpenSSL, if built with EXPERIMENTAL_OCSP, a new option tls_ocsp_file
3f7eeb86
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567 is now available. If the contents of the file are valid, then Exim will
568 send that back in response to a TLS status request; this is OCSP Stapling.
569 Exim will not maintain the contents of the file in any way: administrators
570 are responsible for ensuring that it is up-to-date.
571
572 See "experimental-spec.txt" for more details.
573
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57413. ${lookup dnsdb{ }} supports now SPF record types. They are handled
575 identically to TXT record lookups.
576
2605c55b 57714. New expansion variable $tod_epoch_l for higher-precision time.
c1e794ba 578
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57915. New global option tls_dh_max_bits, defaulting to current value of NSS
580 hard-coded limit of DH ephemeral bits, to fix interop problems caused by
581 GnuTLS 2.12 library recommending a bit count higher than NSS supports.
582
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58316. tls_dhparam now used by both OpenSSL and GnuTLS, can be path or identifier.
584 Option can now be a path or an identifier for a standard prime.
585 If unset, we use the DH prime from section 2.2 of RFC 5114, "ike23".
586 Set to "historic" to get the old GnuTLS behaviour of auto-generated DH
587 primes.
588
3ecab157 58917. SSLv2 now disabled by default in OpenSSL. (Never supported by GnuTLS).
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590 Use "openssl_options -no_sslv2" to re-enable support, if your OpenSSL
591 install was not built with OPENSSL_NO_SSL2 ("no-ssl2").
592
9e45c72b 593
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594Version 4.77
595------------
596
597 1. New options for the ratelimit ACL condition: /count= and /unique=.
598 The /noupdate option has been replaced by a /readonly option.
599
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600 2. The SMTP transport's protocol option may now be set to "smtps", to
601 use SSL-on-connect outbound.
602
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603 3. New variable $av_failed, set true if the AV scanner deferred; ie, when
604 there is a problem talking to the AV scanner, or the AV scanner running.
605
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606 4. New expansion conditions, "inlist" and "inlisti", which take simple lists
607 and check if the search item is a member of the list. This does not
608 support named lists, but does subject the list part to string expansion.
609
610 5. Unless the new EXPAND_LISTMATCH_RHS build option is set when Exim was
611 built, Exim no longer performs string expansion on the second string of
612 the match_* expansion conditions: "match_address", "match_domain",
613 "match_ip" & "match_local_part". Named lists can still be used.
614
7c6d71af 615
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616Version 4.76
617------------
618
619 1. The global option "dns_use_edns0" may be set to coerce EDNS0 usage on
620 or off in the resolver library.
621
622
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623Version 4.75
624------------
625
626 1. In addition to the existing LDAP and LDAP/SSL ("ldaps") support, there
627 is now LDAP/TLS support, given sufficiently modern OpenLDAP client
628 libraries. The following global options have been added in support of
629 this: ldap_ca_cert_dir, ldap_ca_cert_file, ldap_cert_file, ldap_cert_key,
630 ldap_cipher_suite, ldap_require_cert, ldap_start_tls.
631
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632 2. The pipe transport now takes a boolean option, "freeze_signal", default
633 false. When true, if the external delivery command exits on a signal then
634 Exim will freeze the message in the queue, instead of generating a bounce.
635
f1e5fef5
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636 3. Log filenames may now use %M as an escape, instead of %D (still available).
637 The %M pattern expands to yyyymm, providing month-level resolution.
638
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PP
639 4. The $message_linecount variable is now updated for the maildir_tag option,
640 in the same way as $message_size, to reflect the real number of lines,
641 including any header additions or removals from transport.
642
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643 5. When contacting a pool of SpamAssassin servers configured in spamd_address,
644 Exim now selects entries randomly, to better scale in a cluster setup.
645
bc19a55b 646
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PP
647Version 4.74
648------------
649
1670ef10
PP
650 1. SECURITY FIX: privilege escalation flaw fixed. On Linux (and only Linux)
651 the flaw permitted the Exim run-time user to cause root to append to
652 arbitrary files of the attacker's choosing, with the content based
653 on content supplied by the attacker.
654
655 2. Exim now supports loading some lookup types at run-time, using your
a01ba081
PP
656 platform's dlopen() functionality. This has limited platform support
657 and the intention is not to support every variant, it's limited to
658 dlopen(). This permits the main Exim binary to not be linked against
659 all the libraries needed for all the lookup types.
660
661
77bb000f
PP
662Version 4.73
663------------
664
2cfd3221
PP
665 NOTE: this version is not guaranteed backwards-compatible, please read the
666 items below carefully
667
77bb000f
PP
668 1. A new main configuration option, "openssl_options", is available if Exim
669 is built with SSL support provided by OpenSSL. The option allows
670 administrators to specify OpenSSL options to be used on connections;
671 typically this is to set bug compatibility features which the OpenSSL
672 developers have not enabled by default. There may be security
673 consequences for certain options, so these should not be changed
674 frivolously.
675
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676 2. A new pipe transport option, "permit_coredumps", may help with problem
677 diagnosis in some scenarios. Note that Exim is typically installed as
678 a setuid binary, which on most OSes will inhibit coredumps by default,
43236f35 679 so that safety mechanism would have to be overridden for this option to
a29e5231
PP
680 be able to take effect.
681
8544e77a
PP
682 3. ClamAV 0.95 is now required for ClamAV support in Exim, unless
683 Local/Makefile sets: WITH_OLD_CLAMAV_STREAM=yes
684 Note that this switches Exim to use a new API ("INSTREAM") and a future
685 release of ClamAV will remove support for the old API ("STREAM").
686
687 The av_scanner option, when set to "clamd", now takes an optional third
688 part, "local", which causes Exim to pass a filename to ClamAV instead of
689 the file content. This is the same behaviour as when clamd is pointed at
690 a Unix-domain socket. For example:
691
692 av_scanner = clamd:192.0.2.3 1234:local
693
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PP
694 ClamAV's ExtendedDetectionInfo response format is now handled.
695
8544e77a
PP
696 4. There is now a -bmalware option, restricted to admin users. This option
697 takes one parameter, a filename, and scans that file with Exim's
698 malware-scanning framework. This is intended purely as a debugging aid
699 to ensure that Exim's scanning is working, not to replace other tools.
a9622bc6
PP
700 Note that the ACL framework is not invoked, so if av_scanner references
701 ACL variables without a fallback then this will fail.
8544e77a 702
83e029d5
PP
703 5. There is a new expansion operator, "reverse_ip", which will reverse IP
704 addresses; IPv4 into dotted quad, IPv6 into dotted nibble. Examples:
705
706 ${reverse_ip:192.0.2.4}
707 -> 4.2.0.192
708 ${reverse_ip:2001:0db8:c42:9:1:abcd:192.0.2.3}
709 -> 3.0.2.0.0.0.0.c.d.c.b.a.1.0.0.0.9.0.0.0.2.4.c.0.8.b.d.0.1.0.0.2
710
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PP
711 6. There is a new ACL control called "debug", to enable debug logging.
712 This allows selective logging of certain incoming transactions within
713 production environments, with some care. It takes two options, "tag"
714 and "opts"; "tag" is included in the filename of the log and "opts"
715 is used as per the -d<options> command-line option. Examples, which
716 don't all make sense in all contexts:
717
718 control = debug
719 control = debug/tag=.$sender_host_address
720 control = debug/opts=+expand+acl
721 control = debug/tag=.$message_exim_id/opts=+expand
722
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723 7. It has always been implicit in the design and the documentation that
724 "the Exim user" is not root. src/EDITME said that using root was
725 "very strongly discouraged". This is not enough to keep people from
726 shooting themselves in the foot in days when many don't configure Exim
727 themselves but via package build managers. The security consequences of
728 running various bits of network code are severe if there should be bugs in
729 them. As such, the Exim user may no longer be root. If configured
730 statically, Exim will refuse to build. If configured as ref:user then Exim
731 will exit shortly after start-up. If you must shoot yourself in the foot,
732 then henceforth you will have to maintain your own local patches to strip
733 the safeties off.
734
06a6f4ed 735 8. There is a new expansion condition, bool_lax{}. Where bool{} uses the ACL
6a8de854
PP
736 condition logic to determine truth/failure and will fail to expand many
737 strings, bool_lax{} uses the router condition logic, where most strings
738 do evaluate true.
739 Note: bool{00} is false, bool_lax{00} is true.
740
06a6f4ed 741 9. Routers now support multiple "condition" tests.
532be449 742
5dc43717
JJ
74310. There is now a runtime configuration option "tcp_wrappers_daemon_name".
744 Setting this allows an admin to define which entry in the tcpwrappers
745 config file will be used to control access to the daemon. This option
746 is only available when Exim is built with USE_TCP_WRAPPERS. The
747 default value is set at build time using the TCP_WRAPPERS_DAEMON_NAME
748 build option.
749
79d4bc3d
PP
75011. [POSSIBLE CONFIG BREAKAGE] The default value for system_filter_user is now
751 the Exim run-time user, instead of root.
752
2cfd3221
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75312. [POSSIBLE CONFIG BREAKAGE] ALT_CONFIG_ROOT_ONLY is no longer optional and
754 is forced on. This is mitigated by the new build option
90b6341f 755 TRUSTED_CONFIG_LIST which defines a list of configuration files which
7f7f0545
DW
756 are trusted; one per line. If a config file is owned by root and matches
757 a pathname in the list, then it may be invoked by the Exim build-time
758 user without Exim relinquishing root privileges.
2cfd3221
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759
76013. [POSSIBLE CONFIG BREAKAGE] The Exim user is no longer automatically
761 trusted to supply -D<Macro[=Value]> overrides on the command-line. Going
90b6341f
DW
762 forward, we recommend using TRUSTED_CONFIG_LIST with shim configs that
763 include the main config. As a transition mechanism, we are temporarily
764 providing a work-around: the new build option WHITELIST_D_MACROS provides
43236f35 765 a colon-separated list of macro names which may be overridden by the Exim
90b6341f
DW
766 run-time user. The values of these macros are constrained to the regex
767 ^[A-Za-z0-9_/.-]*$ (which explicitly does allow for empty values).
2cfd3221 768
77bb000f 769
3fc596e4
NM
770Version 4.72
771------------
772
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PP
773 1. TWO SECURITY FIXES: one relating to mail-spools which are globally
774 writable, the other to locking of MBX folders (not mbox).
775
776 2. MySQL stored procedures are now supported.
777
778 3. The dkim_domain transport option is now a list, not a single string, and
779 messages will be signed for each element in the list (discarding
780 duplicates).
781
782 4. The 4.70 release unexpectedly changed the behaviour of dnsdb TXT lookups
783 in the presence of multiple character strings within the RR. Prior to 4.70,
784 only the first string would be returned. The dnsdb lookup now, by default,
785 preserves the pre-4.70 semantics, but also now takes an extended output
8f425947
PP
786 separator specification. The separator can be followed by a semicolon, to
787 concatenate the individual text strings together with no join character,
788 or by a comma and a second separator character, in which case the text
789 strings within a TXT record are joined on that second character.
790 Administrators are reminded that DNS provides no ordering guarantees
791 between multiple records in an RRset. For example:
b26eacf1
PP
792
793 foo.example. IN TXT "a" "b" "c"
794 foo.example. IN TXT "d" "e" "f"
795
796 ${lookup dnsdb{>/ txt=foo.example}} -> "a/d"
797 ${lookup dnsdb{>/; txt=foo.example}} -> "def/abc"
8f425947 798 ${lookup dnsdb{>/,+ txt=foo.example}} -> "a+b+c/d+e+f"
b26eacf1 799
3fc596e4 800
f33253cc
NM
801Version 4.70 / 4.71
802-------------------
65a7d8c3 803
7c6d71af 804 1. Native DKIM support without an external library.
a8c8d6b5
JJ
805 (Note that if no action to prevent it is taken, a straight upgrade will
806 result in DKIM verification of all signed incoming emails. See spec
807 for details on conditionally disabling)
7c6d71af
NM
808
809 2. Experimental DCC support via dccifd (contributed by Wolfgang Breyha).
65a7d8c3 810
f33253cc 811 3. There is now a bool{} expansion condition which maps certain strings to
7d9f747b 812 true/false condition values (most likely of use in conjunction with the
f33253cc
NM
813 and{} expansion operator).
814
815 4. The $spam_score, $spam_bar and $spam_report variables are now available
816 at delivery time.
817
818 5. exim -bP now supports "macros", "macro_list" or "macro MACRO_NAME" as
819 options, provided that Exim is invoked by an admin_user.
820
821 6. There is a new option gnutls_compat_mode, when linked against GnuTLS,
822 which increases compatibility with older clients at the cost of decreased
823 security. Don't set this unless you need to support such clients.
824
825 7. There is a new expansion operator, ${randint:...} which will produce a
826 "random" number less than the supplied integer. This randomness is
827 not guaranteed to be cryptographically strong, but depending upon how
828 Exim was built may be better than the most naive schemes.
829
830 8. Exim now explicitly ensures that SHA256 is available when linked against
831 OpenSSL.
832
833 9. The transport_filter_timeout option now applies to SMTP transports too.
834
65a7d8c3 835
7d9f747b
PP
836Version 4.69
837------------
838
839 1. Preliminary DKIM support in Experimental.
840
841
2b85bce7
PH
842Version 4.68
843------------
844
845 1. The body_linecount and body_zerocount C variables are now exported in the
846 local_scan API.
847
93655c46
PH
848 2. When a dnslists lookup succeeds, the key that was looked up is now placed
849 in $dnslist_matched. When the key is an IP address, it is not reversed in
850 this variable (though it is, of course, in the actual lookup). In simple
851 cases, for example:
852
853 deny dnslists = spamhaus.example
854
855 the key is also available in another variable (in this case,
856 $sender_host_address). In more complicated cases, however, this is not
857 true. For example, using a data lookup might generate a dnslists lookup
858 like this:
859
860 deny dnslists = spamhaus.example/<|192.168.1.2|192.168.6.7|...
861
862 If this condition succeeds, the value in $dnslist_matched might be
863 192.168.6.7 (for example).
864
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PH
865 3. Authenticators now have a client_condition option. When Exim is running as
866 a client, it skips an authenticator whose client_condition expansion yields
867 "0", "no", or "false". This can be used, for example, to skip plain text
868 authenticators when the connection is not encrypted by a setting such as:
869
870 client_condition = ${if !eq{$tls_cipher}{}}
871
872 Note that the 4.67 documentation states that $tls_cipher contains the
873 cipher used for incoming messages. In fact, during SMTP delivery, it
874 contains the cipher used for the delivery. The same is true for
875 $tls_peerdn.
876
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877 4. There is now a -Mvc <message-id> option, which outputs a copy of the
878 message to the standard output, in RFC 2822 format. The option can be used
879 only by an admin user.
880
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PH
881 5. There is now a /noupdate option for the ratelimit ACL condition. It
882 computes the rate and checks the limit as normal, but it does not update
883 the saved data. This means that, in relevant ACLs, it is possible to lookup
884 the existence of a specified (or auto-generated) ratelimit key without
885 incrementing the ratelimit counter for that key.
886
887 In order for this to be useful, another ACL entry must set the rate
888 for the same key somewhere (otherwise it will always be zero).
889
890 Example:
891
892 acl_check_connect:
893 # Read the rate; if it doesn't exist or is below the maximum
894 # we update it below
895 deny ratelimit = 100 / 5m / strict / noupdate
896 log_message = RATE: $sender_rate / $sender_rate_period \
897 (max $sender_rate_limit)
898
899 [... some other logic and tests...]
900
901 warn ratelimit = 100 / 5m / strict / per_cmd
902 log_message = RATE UPDATE: $sender_rate / $sender_rate_period \
903 (max $sender_rate_limit)
904 condition = ${if le{$sender_rate}{$sender_rate_limit}}
905
906 accept
907
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908 6. The variable $max_received_linelength contains the number of bytes in the
909 longest line that was received as part of the message, not counting the
910 line termination character(s).
911
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PH
912 7. Host lists can now include +ignore_defer and +include_defer, analagous to
913 +ignore_unknown and +include_unknown. These options should be used with
914 care, probably only in non-critical host lists such as whitelists.
915
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PH
916 8. There's a new option called queue_only_load_latch, which defaults true.
917 If set false when queue_only_load is greater than zero, Exim re-evaluates
918 the load for each incoming message in an SMTP session. Otherwise, once one
919 message is queued, the remainder are also.
920
4f054c63 921 9. There is a new ACL, specified by acl_smtp_notquit, which is run in most
8f128379
PH
922 cases when an SMTP session ends without sending QUIT. However, when Exim
923 itself is is bad trouble, such as being unable to write to its log files,
924 this ACL is not run, because it might try to do things (such as write to
925 log files) that make the situation even worse.
926
927 Like the QUIT ACL, this new ACL is provided to make it possible to gather
928 statistics. Whatever it returns (accept or deny) is immaterial. The "delay"
929 modifier is forbidden in this ACL.
930
931 When the NOTQUIT ACL is running, the variable $smtp_notquit_reason is set
932 to a string that indicates the reason for the termination of the SMTP
933 connection. The possible values are:
934
935 acl-drop Another ACL issued a "drop" command
936 bad-commands Too many unknown or non-mail commands
937 command-timeout Timeout while reading SMTP commands
938 connection-lost The SMTP connection has been lost
939 data-timeout Timeout while reading message data
940 local-scan-error The local_scan() function crashed
941 local-scan-timeout The local_scan() function timed out
942 signal-exit SIGTERM or SIGINT
943 synchronization-error SMTP synchronization error
944 tls-failed TLS failed to start
945
946 In most cases when an SMTP connection is closed without having received
947 QUIT, Exim sends an SMTP response message before actually closing the
948 connection. With the exception of acl-drop, the default message can be
949 overridden by the "message" modifier in the NOTQUIT ACL. In the case of a
950 "drop" verb in another ACL, it is the message from the other ACL that is
951 used.
952
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95310. For MySQL and PostgreSQL lookups, it is now possible to specify a list of
954 servers with individual queries. This is done by starting the query with
955 "servers=x:y:z;", where each item in the list may take one of two forms:
956
957 (1) If it is just a host name, the appropriate global option (mysql_servers
958 or pgsql_servers) is searched for a host of the same name, and the
959 remaining parameters (database, user, password) are taken from there.
960
961 (2) If it contains any slashes, it is taken as a complete parameter set.
962
963 The list of servers is used in exactly the same was as the global list.
964 Once a connection to a server has happened and a query has been
965 successfully executed, processing of the lookup ceases.
966
967 This feature is intended for use in master/slave situations where updates
968 are occurring, and one wants to update a master rather than a slave. If the
969 masters are in the list for reading, you might have:
970
971 mysql_servers = slave1/db/name/pw:slave2/db/name/pw:master/db/name/pw
972
973 In an updating lookup, you could then write
974
975 ${lookup mysql{servers=master; UPDATE ...}
976
977 If, on the other hand, the master is not to be used for reading lookups:
978
979 pgsql_servers = slave1/db/name/pw:slave2/db/name/pw
980
981 you can still update the master by
982
983 ${lookup pgsql{servers=master/db/name/pw; UPDATE ...}
984
ddea74fa
PH
98511. The message_body_newlines option (default FALSE, for backwards
986 compatibility) can be used to control whether newlines are present in
987 $message_body and $message_body_end. If it is FALSE, they are replaced by
988 spaces.
989
2b85bce7 990
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PH
991Version 4.67
992------------
993
994 1. There is a new log selector called smtp_no_mail, which is not included in
995 the default setting. When it is set, a line is written to the main log
996 whenever an accepted SMTP connection terminates without having issued a
4aa45c31 997 MAIL command.
b4ed4da0 998
431b7361 999 2. When an item in a dnslists list is followed by = and & and a list of IP
4aa45c31
PH
1000 addresses, the behaviour was not clear when the lookup returned more than
1001 one IP address. This has been solved by the addition of == and =& for "all"
93655c46 1002 rather than the default "any" matching.
431b7361 1003
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1004 3. Up till now, the only control over which cipher suites GnuTLS uses has been
1005 for the cipher algorithms. New options have been added to allow some of the
1006 other parameters to be varied.
431b7361 1007
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1008 4. There is a new compile-time option called ENABLE_DISABLE_FSYNC. When it is
1009 set, Exim compiles a runtime option called disable_fsync.
431b7361 1010
4aa45c31 1011 5. There is a new variable called $smtp_count_at_connection_start.
431b7361 1012
4aa45c31 1013 6. There's a new control called no_pipelining.
cf8b11a5 1014
41c7c167 1015 7. There are two new variables called $sending_ip_address and $sending_port.
4aa45c31 1016 These are set whenever an SMTP connection to another host has been set up.
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1017
1018 8. The expansion of the helo_data option in the smtp transport now happens
4aa45c31 1019 after the connection to the server has been made.
41c7c167 1020
9c57cbc0 1021 9. There is a new expansion operator ${rfc2047d: that decodes strings that
4aa45c31 1022 are encoded as per RFC 2047.
9c57cbc0 1023
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102410. There is a new log selector called "pid", which causes the current process
1025 id to be added to every log line, in square brackets, immediately after the
1026 time and date.
1027
047bdd8c 102811. Exim has been modified so that it flushes SMTP output before implementing
4c590bd1
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1029 a delay in an ACL. It also flushes the output before performing a callout,
1030 as this can take a substantial time. These behaviours can be disabled by
1031 obeying control = no_delay_flush or control = no_callout_flush,
4aa45c31 1032 respectively, at some earlier stage of the connection.
047bdd8c 1033
0ce9abe6 103412. There are two new expansion conditions that iterate over a list. They are
4aa45c31 1035 called forany and forall.
0ce9abe6 1036
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103713. There's a new global option called dsn_from that can be used to vary the
1038 contents of From: lines in bounces and other automatically generated
1039 messages ("delivery status notifications" - hence the name of the option).
0e22dfd1 1040
4aa45c31 104114. The smtp transport has a new option called hosts_avoid_pipelining.
c51b8e75 1042
75b1493f 104315. By default, exigrep does case-insensitive matches. There is now a -I option
4aa45c31 1044 that makes it case-sensitive.
29f89cad 1045
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104616. A number of new features ("addresses", "map", "filter", and "reduce") have
1047 been added to string expansions to make it easier to process lists of
1048 items, typically addresses.
29f89cad 1049
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105017. There's a new ACL modifier called "continue". It does nothing of itself,
1051 and processing of the ACL always continues with the next condition or
1052 modifier. It is provided so that the side effects of expanding its argument
4aa45c31 1053 can be used.
c3611384 1054
ec95d1a6 105518. It is now possible to use newline and other control characters (those with
4aa45c31 1056 values less than 32, plus DEL) as separators in lists.
ec95d1a6 1057
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105819. The exigrep utility now has a -v option, which inverts the matching
1059 condition.
1060
c456d9bb 106120. The host_find_failed option in the manualroute router can now be set to
4aa45c31 1062 "ignore".
c456d9bb 1063
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1064
1065Version 4.66
1066------------
1067
1068No new features were added to 4.66.
1069
1070
1071Version 4.65
1072------------
1073
1074No new features were added to 4.65.
1075
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1076
1077Version 4.64
1078------------
1079
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1080 1. ACL variables can now be given arbitrary names, as long as they start with
1081 "acl_c" or "acl_m" (for connection variables and message variables), are at
1082 least six characters long, with the sixth character being either a digit or
883335dc 1083 an underscore.
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1084
1085 2. There is a new ACL modifier called log_reject_target. It makes it possible
883335dc 1086 to specify which logs are used for messages about ACL rejections.
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1087
1088 3. There is a new authenticator called "dovecot". This is an interface to the
1089 authentication facility of the Dovecot POP/IMAP server, which can support a
883335dc 1090 number of authentication methods.
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1091
1092 4. The variable $message_headers_raw provides a concatenation of all the
1093 messages's headers without any decoding. This is in contrast to
1094 $message_headers, which does RFC2047 decoding on the header contents.
1095
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1096 5. In a DNS black list, if two domain names, comma-separated, are given, the
1097 second is used first to do an initial check, making use of any IP value
1098 restrictions that are set. If there is a match, the first domain is used,
1099 without any IP value restrictions, to get the TXT record.
af561417 1100
883335dc 1101 6. All authenticators now have a server_condition option.
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1102
1103 7. There is a new command-line option called -Mset. It is useful only in
1104 conjunction with -be (that is, when testing string expansions). It must be
1105 followed by a message id; Exim loads the given message from its spool
883335dc 1106 before doing the expansions.
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1107
1108 8. Another similar new command-line option is called -bem. It operates like
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1109 -be except that it must be followed by the name of a file that contains a
1110 message.
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1111
1112 9. When an address is delayed because of a 4xx response to a RCPT command, it
1113 is now the combination of sender and recipient that is delayed in
883335dc 1114 subsequent queue runs until its retry time is reached.
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1115
111610. Unary negation and the bitwise logical operators and, or, xor, not, and
883335dc 1117 shift, have been added to the eval: and eval10: expansion items.
48c7f9e2 1118
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111911. The variables $interface_address and $interface_port have been renamed
1120 as $received_ip_address and $received_port, to make it clear that they
1121 relate to message reception rather than delivery. (The old names remain
1122 available for compatibility.)
1123
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112412. The "message" modifier can now be used on "accept" and "discard" acl verbs
1125 to vary the message that is sent when an SMTP command is accepted.
4e88a19f 1126
495ae4b0 1127
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1128Version 4.63
1129------------
1130
11311. There is a new Boolean option called filter_prepend_home for the redirect
38a0a95f 1132 router.
4608d683 1133
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11342. There is a new acl, set by acl_not_smtp_start, which is run right at the
1135 start of receiving a non-SMTP message, before any of the message has been
38a0a95f 1136 read.
45b91596 1137
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11383. When an SMTP error message is specified in a "message" modifier in an ACL,
1139 or in a :fail: or :defer: message in a redirect router, Exim now checks the
38a0a95f 1140 start of the message for an SMTP error code.
a5bd321b 1141
6ec97b1b 11424. There is a new parameter for LDAP lookups called "referrals", which takes
38a0a95f 1143 one of the settings "follow" (the default) or "nofollow".
6ec97b1b 1144
e22ca4ac
JJ
11455. Version 20070721.2 of exipick now included, offering these new options:
1146 --reverse
1147 After all other sorting options have bee processed, reverse order
1148 before displaying messages (-R is synonym).
1149 --random
1150 Randomize order of matching messages before displaying.
1151 --size
1152 Instead of displaying the matching messages, display the sum
1153 of their sizes.
1154 --sort <variable>[,<variable>...]
1155 Before displaying matching messages, sort the messages according to
1156 each messages value for each variable.
1157 --not
1158 Negate the value for every test (returns inverse output from the
1159 same criteria without --not).
1160
4608d683 1161
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1162Version 4.62
1163------------
1164
11651. The ${readsocket expansion item now supports Internet domain sockets as well
1166 as Unix domain sockets. If the first argument begins "inet:", it must be of
1167 the form "inet:host:port". The port is mandatory; it may be a number or the
1168 name of a TCP port in /etc/services. The host may be a name, or it may be an
1169 IP address. An ip address may optionally be enclosed in square brackets.
1170 This is best for IPv6 addresses. For example:
1171
1172 ${readsocket{inet:[::1]:1234}{<request data>}...
1173
1174 Only a single host name may be given, but if looking it up yield more than
1175 one IP address, they are each tried in turn until a connection is made. Once
1176 a connection has been made, the behaviour is as for ${readsocket with a Unix
1177 domain socket.
1178
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11792. If a redirect router sets up file or pipe deliveries for more than one
1180 incoming address, and the relevant transport has batch_max set greater than
1181 one, a batch delivery now occurs.
1182
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11833. The appendfile transport has a new option called maildirfolder_create_regex.
1184 Its value is a regular expression. For a maildir delivery, this is matched
1185 against the maildir directory; if it matches, Exim ensures that a
1186 maildirfolder file is created alongside the new, cur, and tmp directories.
1187
1cce3af8 1188
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1189Version 4.61
1190------------
1191
4f578862
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1192The documentation is up-to-date for the 4.61 release. Major new features since
1193the 4.60 release are:
1194
1195. An option called disable_ipv6, to disable the use of IPv6 completely.
1196
1197. An increase in the number of ACL variables to 20 of each type.
1198
1199. A change to use $auth1, $auth2, and $auth3 in authenticators instead of $1,
1200 $2, $3, (though those are still set) because the numeric variables get used
1201 for other things in complicated expansions.
1202
843a41e8 1203. The default for rfc1413_query_timeout has been changed from 30s to 5s.
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1204
1205. It is possible to use setclassresources() on some BSD OS to control the
1206 resources used in pipe deliveries.
1207
1208. A new ACL modifier called add_header, which can be used with any verb.
1209
1210. More errors are detectable in retry rules.
1211
1212There are a number of other additions too.
71fafd95 1213
7e66e54d 1214
425ae40f 1215Version 4.60
b5aea5e1
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1216------------
1217
425ae40f
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1218The documentation is up-to-date for the 4.60 release. Major new features since
1219the 4.50 release are:
1a46a8c5 1220
425ae40f 1221. Support for SQLite.
1a46a8c5 1222
425ae40f 1223. Support for IGNOREQUOTA in LMTP.
1a46a8c5 1224
425ae40f 1225. Extensions to the "submission mode" features.
1a46a8c5 1226
425ae40f 1227. Support for Client SMTP Authorization (CSA).
1a46a8c5 1228
425ae40f 1229. Support for ratelimiting hosts and users.
b5aea5e1 1230
425ae40f 1231. New expansion items to help with the BATV "prvs" scheme.
b5aea5e1 1232
425ae40f 1233. A "match_ip" condition, that matches an IP address against a list.
35edf2ff 1234
425ae40f 1235There are many more minor changes.
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1236
1237****