X-Git-Url: https://git.exim.org/users/jgh/exim.git/blobdiff_plain/754a0503134b184183f64c04ed30a3524fc3860b..0929ce9ca518b6987b63cf8659338ca434e07d9b:/doc/doc-txt/ChangeLog diff --git a/doc/doc-txt/ChangeLog b/doc/doc-txt/ChangeLog index 820016310..5427392b9 100644 --- a/doc/doc-txt/ChangeLog +++ b/doc/doc-txt/ChangeLog @@ -1,7 +1,1307 @@ -$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.632 2010/06/12 15:21:25 jetmore Exp $ - Change log file for Exim from version 4.21 ------------------------------------------- +This document describes *changes* to previous versions, that might +affect Exim's operation, with an unchanged configuration file. For new +options, and new features, see the NewStuff file next to this ChangeLog. + +Exim version 4.89 +------------------- +JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules + than -2003 did; needs libidn2 in addition to linidn. + +JH/02 The path option on a pipe transport is now expanded before use. + + +Exim version 4.88 +----------------- +JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination + supports it and a size is available (ie. the sending peer gave us one). + +JH/02 The obsolete acl condition "demime" is removed (finally, after ten + years of being deprecated). The replacements are the ACLs + acl_smtp_mime and acl_not_smtp_mime. + +JH/03 Upgrade security requirements imposed for hosts_try_dane: previously + a downgraded non-dane trust-anchor for the TLS connection (CA-style) + or even an in-clear connection were permitted. Now, if the host lookup + was dnssec and dane was requested then the host is only used if the + TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority + MXs) will be tried (for hosts_try_dane though not for hosts_require_dane) + if one fails this test. + This means that a poorly-configured remote DNS will make it incommunicado; + but it protects against a DNS-interception attack on it. + +JH/04 Bug 1810: make continued-use of an open smtp transport connection + non-noisy when a race steals the message being considered. + +JH/05 If main configuration option tls_certificate is unset, generate a + self-signed certificate for inbound TLS connections. + +JH/06 Bug 165: hide more cases of password exposure - this time in expansions + in rewrites and routers. + +JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80 + and logged a warning sing 4.83; now they are a configuration file error. + +JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name + (lacking @domain). Apply the same qualification processing as RCPT. + +JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode. + +JH/10 Support ${sha256:} applied to a string (as well as the previous + certificate). + +JH/11 Cutthrough: avoid using the callout hints db on a verify callout when + a cutthrough deliver is pending, as we always want to make a connection. + This also avoids re-routing the message when later placing the cutthrough + connection after a verify cache hit. + Do not update it with the verify result either. + +JH/12 Cutthrough: disable when verify option success_on_redirect is used, and + when routing results in more than one destination address. + +JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim + signing (which inhibits the cutthrough capability). Previously only + the presence of an option was tested; now an expansion evaluating as + empty is permissible (obviously it should depend only on data available + when the cutthrough connection is made). + +JH/14 Fix logging of errors under PIPELINING. Previously the log line giving + the relevant preceding SMTP command did not note the pipelining mode. + +JH/15 Fix counting of empty lines in $body_linecount and $message_linecount. + Previously they were not counted. + +JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same + as one having no matching records. Previously we deferred the message + that needed the lookup. + +JH/17 Fakereject: previously logged as a norml message arrival "<="; now + distinguished as "(=". + +JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work + for missing MX records. Previously it only worked for missing A records. + +JH/19 Bug 1850: support Radius libraries that return REJECT_RC. + +JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops + after the data-go-ahead and data-ack. Patch from Jason Betts. + +JH/21 Bug 1846: Send DMARC forensic reports for reject and quaratine results, + even for a "none" policy. Patch from Tony Meyer. + +JH/22 Fix continued use of a connection for further deliveries. If a port was + specified by a router, it must also match for the delivery to be + compatible. + +JH/23 Bug 1874: fix continued use of a connection for further deliveries. + When one of the recipients of a message was unsuitable for the connection + (has no matching addresses), we lost track of needing to mark it + deferred. As a result mail would be lost. + +JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO. + +JH/25 Decoding ACL controls is now done using a binary search; the source code + takes up less space and should be simpler to maintain. Merge the ACL + condition decode tables also, with similar effect. + +JH/26 Fix problem with one_time used on a redirect router which returned the + parent address unchanged. A retry would see the parent address marked as + delivered, so not attempt the (identical) child. As a result mail would + be lost. + +JH/27 Fix a possible security hole, wherein a process operating with the Exim + UID can gain a root shell. Credit to http://www.halfdog.net/ for + discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim + itself :( + +JH/28 Enable {spool,log} filesystem space and inode checks as default. + Main config options check_{log,spool}_{inodes,space} are now + 100 inodes, 10MB unless set otherwise in the configuration. + +JH/29 Fix the connection_reject log selector to apply to the connect ACL. + Previously it only applied to the main-section connection policy + options. + +JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext. + +PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created + by me. Added RFC7919 DH primes as an alternative. + +PP/02 Unbreak build via pkg-config with new hash support when crypto headers + are not in the system include path. + +JH/31 Fix longstanding bug with aborted TLS server connection handling. Under + GnuTLS, when a session startup failed (eg because the client disconnected) + Exim did stdio operations after fclose. This was exposed by a recent + change which nulled out the file handle after the fclose. + +JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is + signed directly by the cert-signing cert, rather than an intermediate + OCSP-signing cert. This is the model used by LetsEncrypt. + +JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT. + +HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on + an incoming connection. + +HS/02 Bug 1802: Do not half-close the connection after sending a request + to rspamd. + +HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2 + fallback to "prime256v1". + +JH/34 SECURITY: Use proper copy of DATA command in error message. + Could leak key material. Remotely explaoitable. CVE-2016-9963. + + +Exim version 4.87 +----------------- +JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16 + and 3.4.4 - once the server is enabled to respond to an OCSP request + it does even when not requested, resulting in a stapling non-aware + client dropping the TLS connection. + +TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to + support variable-length bit vectors. No functional change. + +TF/02 Improve the consistency of logging incoming and outgoing interfaces. + The I= interface field on outgoing lines is now after the H= remote + host field, same as incoming lines. There is a separate + outgoing_interface log selector which allows you to disable the + outgoing I= field. + +JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write. + If not running log_selector +smtp_connection the mainlog would be held + open indefinitely after a "too many connections" event, including to a + deleted file after a log rotate. Leave the per net connection logging + leaving it open for efficiency as that will be quickly detected by the + check on the next write. + +HS/01 Bug 1671: Fix post transport crash. + Processing the wait- messages could crash the delivery + process if the message IDs didn't exist for some reason. When + using 'split_spool_directory=yes' the construction of the spool + file name failed already, exposing the same netto behaviour. + +JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex & + mime_regex ACL conditions. + +JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information + to DSN fail messages (bounces): remote IP, remote greeting, remote response + to HELO, local diagnostic string. + +JH/05 Downgrade message for a TLS-certificate-based authentication fail from + log line to debug. Even when configured with a tls authenticator many + client connections are expected to not authenticate in this way, so + an authenticate fail is not an error. + +HS/02 Add the Exim version string to the process info. This way exiwhat + gives some more detail about the running daemon. + +JH/06 Bug 1395: time-limit cacheing of DNS lookups, to the TTL value. This may + matter for fast-change records such as DNSBLs. + +JH/07 Bug 1678: Always record an interface option value, if set, as part of a + retry record, even if constant. There may be multiple transports with + different interface settings and the retry behaviour needs to be kept + distinct. + +JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments. + +JH/09 Bug 1700: ignore space & tab embedded in base64 during decode. + +JH/10 Bug 840: fix log_defer_output option of pipe transport + +JH/11 Bug 830: use same host for all RCPTS of a message, even under + hosts_randomize. This matters a lot when combined with mua_wrapper. + +JH/12 Bug 1706: percent and underbar characters are no longer escaped by the + ${quote_pgsql:} operator. + +JH/13 Bug 1708: avoid misaligned access in cached lookup. + +JH/14 Change header file name for freeradius-client. Relevant if compiling + with Radius support; from the Gentoo tree and checked under Fedora. + +JH/15 Bug 1712: Introduce $prdr_requested flag variable + +JH/16 Bug 1714: Permit an empty string as expansion result for transport + option transport_filter, meaning no filtering. + +JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts. + +JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now + defaults to "*" (all hosts). The variable is now available when not built + with TLS, default unset, mainly to enable keeping the testuite sane. + If a server certificate is not supplied (via tls_certificate) an error is + logged, and clients will find TLS connections fail on startup. Presumably + they will retry in-clear. + Packagers of Exim are strongly encouraged to create a server certificate + at installation time. + +HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency + with the $config_file variable. + +JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both + in transport context, after the attempt, and per-recipient. The latter type + is per host attempted. The event data is the error message, and the errno + information encodes the lookup type (A vs. MX) used for the (first) host, + and the trailing two digits of the smtp 4xx reponse. + +GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt + to write to mainlog (or rejectlog, paniclog) in the window between file + creation and permissions/ownership being changed. Particularly affects + installations where exicyclog is run as root, rather than exim user; + result is that the running daemon panics and dies. + +JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names. + +JH/21 Bug 1720: Add support for priority groups and weighted-random proxy + selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options + "pri" and "weight". Note that the previous implicit priority given by the + list order is no longer honoured. + +JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalisation + for DKIM processing. + +JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build + by defining SUPPORT_SOCKS. + +JH/26 Move PROXY support from Experimental to mainline, enabled for a build + by defining SUPPORT_PROXY. Note that the proxy_required_hosts option + is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}. + variables are renamed to proxy_{local,external}_{address,port}. + +JH/27 Move Internationalisation support from Experimental to mainline, enabled + for a build by defining SUPPORT_I18N + +JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts + of the query string, and make ${quote_redis:} do that quoting. + +JH/29 Move Events support from Experimental to mainline, enabled by default + and removable for a build by defining DISABLE_EVENT. + +JH/30 Updated DANE implementation code to current from Viktor Dukhovni. + +JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly + cached by the daemon. + +JH/32 Move Redis support from Experimental to mainline, enabled for a build + by defining LOOKUP_REDIS. The libhiredis library is required. + +JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit + keys are given for lookup. + +JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM + support, by using OpenSSL or GnuTLS library ones. This means DKIM is + only supported when built with TLS support. The PolarSSL SHA routines + are still used when the TLS library is too old for convenient support. + +JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option + openssl_options), for security. OpenSSL forces this from version 1.1.0 + server-side so match that on older versions. + +JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh + allocation for $value could be released as the expansion processing + concluded, but leaving the global pointer active for it. + +JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response, + and to use the domains and local_parts ACL conditions. + +JH/38 Fix cutthrough bug with body lines having a single dot. The dot was + incorrectly not doubled on cutthrough transmission, hence seen as a + body-termination at the receiving system - resulting in truncated mails. + Commonly the sender saw a TCP-level error, and retransmitted the message + via the normal store-and-forward channel. This could result in duplicates + received - but deduplicating mailstores were liable to retain only the + initial truncated version. + +JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64. + +JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS. + +JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While + we're in there, support oversigning also; bug 1309. + +JH/42 Bug 1796: Fix error logged on a malware scanner connection failure. + +HS/04 Add support for keep_environment and add_environment options. + +JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain; + either intentional arithmetic overflow during PRNG, or testing config- + induced overflows. + +JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough + delivery resulted in actual delivery. Cancel cutthrough before DATA + stage. + +JH/45 Fix cutthrough, when connection not opened by verify and target hard- + rejects a recipient: pass the reject to the originator. + +JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs. + Many were false-positives and ignorable, but it's worth fixing the + former class. + +JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also + for the new environment-manipulation done at startup. Move the routines + from being local to tls.c to being global via the os.c file. + +JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing + an extract embedded as result-arg for a map, the first arg for extract + is unavailable so we cannot tell if this is a numbered or keyed + extraction. Accept either. + + + +Exim version 4.86 +----------------- +JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now + expanded. + +JH/02 The smtp transport option "multi_domain" is now expanded. + +JH/03 The smtp transport now requests PRDR by default, if the server offers + it. + +JH/04 Certificate name checking on server certificates, when exim is a client, + is now done by default. The transport option tls_verify_cert_hostnames + can be used to disable this per-host. The build option + EXPERIMENTAL_CERTNAMES is withdrawn. + +JH/05 The value of the tls_verify_certificates smtp transport and main options + default to the word "system" to access the system default CA bundle. + For GnuTLS, only version 3.0.20 or later. + +JH/06 Verification of the server certificate for a TLS connection is now tried + (but not required) by default. The verification status is now logged by + default, for both outbound TLS and client-certificate supplying inbound + TLS connections + +JH/07 Changed the default rfc1413 lookup settings to disable calls. Few + sites use this now. + +JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery + Status Notification (bounce) messages are now MIME format per RFC 3464. + Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised + under the control of the dsn_advertise_hosts option, and routers may + have a dsn_lasthop option. + +JH/09 A timeout of 2 minutes is now applied to all malware scanner types by + default, modifiable by a malware= option. The list separator for + the options can now be changed in the usual way. Bug 68. + +JH/10 The smtp_receive_timeout main option is now expanded before use. + +JH/11 The incoming_interface log option now also enables logging of the + local interface on delivery outgoing connections. + +JH/12 The cutthrough-routing facility now supports multi-recipient mails, + if the interface and destination host and port all match. + +JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a + /defer_ok option. + +JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd. + Patch from Andrew Lewis. + +JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition) + now supports optional time-restrictions, weighting, and priority + modifiers per server. Patch originally by . + +JH/16 The spamd_address main option now supports a mixed list of local + and remote servers. Remote servers can be IPv6 addresses, and + specify a port-range. + +JH/17 Bug 68: The spamd_address main option now supports an optional + timeout value per server. + +JH/18 Bug 1581: Router and transport options headers_add/remove can + now have the list separator specified. + +JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry + option values. + +JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails + under OpenSSL. + +JH/21 Support for the A6 type of dns record is withdrawn. + +JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters + rather than the verbs used. + +JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size + from 255 to 1024 chars. + +JH/24 Verification callouts now attempt to use TLS by default. + +HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains) + are generic router options now. The defaults didn't change. + +JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames. + Original patch from Alexander Shikoff, worked over by JH. + +HS/02 Bug 1575: exigrep falls back to autodetection of compressed + files if ZCAT_COMMAND is not executable. + +JH/26 Bug 1539: Add timout/retry options on dnsdb lookups. + +JH/27 Bug 286: Support SOA lookup in dnsdb lookups. + +JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN. + Normally benign, it bites when the pair was led to by a CNAME; + modern usage is to not canoicalize the domain to a CNAME target + (and we were inconsistent anyway for A-only vs AAAA+A). + +JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards. + +JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse, + when evaluating $sender_host_dnssec. + +JH/31 Check the HELO verification lookup for DNSSEC, adding new + $sender_helo_dnssec variable. + +JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve. + +JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log. + +JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues. + +JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was + documented as working, but never had. Support all but $spam_report. + +JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command + added for tls authenticator. + +HS/03 Add perl_taintmode main config option + + +Exim version 4.85 +----------------- +TL/01 When running the test suite, the README says that variables such as + no_msglog_check are global and can be placed anywhere in a specific + test's script, however it was observed that placement needed to be near + the beginning for it to behave that way. Changed the runtest perl + script to read through the entire script once to detect and set these + variables, reset to the beginning of the script, and then run through + the script parsing/test process like normal. + +TL/02 The BSD's have an arc4random API. One of the functions to induce + adding randomness was arc4random_stir(), but it has been removed in + OpenBSD 5.5. Detect this OpenBSD version and skip calling this + function when detected. + +JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now + cause callback expansion. + +TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that + syntax errors in an expansion can be treated as a string instead of + logging or causing an error, due to the internal use of bool_lax + instead of bool when processing it. + +JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for + server certificates when making smtp deliveries. + +JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups. + +JH/04 Add ${sort {list}{condition}{extractor}} expansion item. + +TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep. + +TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups. + Merged patch from Sebastian Wiedenroth. + +JH/05 Fix results-pipe from transport process. Several recipients, combined + with certificate use, exposed issues where response data items split + over buffer boundaries were not parsed properly. This eventually + resulted in duplicates being sent. This issue only became common enough + to notice due to the introduction of conection certificate information, + the item size being so much larger. Found and fixed by Wolfgang Breyha. + +JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed + size buffer was used, resulting in syntax errors when an expansion + exceeded it. + +JH/07 Add support for directories of certificates when compiled with a GnuTLS + version 3.3.6 or later. + +JH/08 Rename the TPDA expermimental facility to Event Actions. The #ifdef + is EXPERIMENTAL_EVENT, the main-configuration and transport options + both become "event_action", the variables become $event_name, $event_data + and $event_defer_errno. There is a new variable $verify_mode, usable in + routers, transports and related events. The tls:cert event is now also + raised for inbound connections, if the main configuration event_action + option is defined. + +TL/06 In test suite, disable OCSP for old versions of openssl which contained + early OCSP support, but no stapling (appears to be less than 1.0.0). + +JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on + server certificate names available under the smtp transport option + "tls_verify_cert_hostname" now do not permit multi-component wildcard + matches. + +JH/10 Time-related extraction expansions from certificates now use the main + option "timezone" setting for output formatting, and are consistent + between OpenSSL and GnuTLS compilations. Bug 1541. + +JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047- + encoded parameter in the incoming message. Bug 1558. + +JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now + include certificate info, eximon was claiming there were spoolfile + syntax errors. + +JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return. + +JH/14 Log delivery-related information more consistently, using the sequence + "H= []" wherever possible. + +TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which + are problematic for Debian distribution, omit them from the release + tarball. + +JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature. + +JH/16 Fix string representation of time values on 64bit time_t anchitectures. + Bug 1561. + +JH/17 Fix a null-indirection in certextract expansions when a nondefault + output list separator was used. + + +Exim version 4.84 +----------------- +TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static + checkers that were complaining about end of non-void function with no + return. + +JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers. + This was a regression intruduced in 4.83 by another bugfix. + +JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled. + +TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when + EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha. + + +Exim version 4.83 +----------------- + +TF/01 Correctly close the server side of TLS when forking for delivery. + + When a message was received over SMTP with TLS, Exim failed to clear up + the incoming connection properly after forking off the child process to + deliver the message. In some situations the subsequent outgoing + delivery connection happened to have the same fd number as the incoming + connection previously had. Exim would try to use TLS and fail, logging + a "Bad file descriptor" error. + +TF/02 Portability fix for building lookup modules on Solaris when the xpg4 + utilities have not been installed. + +JH/01 Fix memory-handling in use of acl as a conditional; avoid free of + temporary space as the ACL may create new global variables. + +TL/01 LDAP support uses per connection or global context settings, depending + upon the detected version of the libraries at build time. + +TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection + to extract and use the src ip:port in logging and expansions as if it + were a direct connection from the outside internet. PPv2 support was + updated based on HAProxy spec change in May 2014. + +JH/02 Add ${listextract {number}{list}{success}{fail}}. + +TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents. + Properly escape header and check for NULL return. + +PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok + not dns_use_dnssec. + +JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp. + +TL/04 Add verify = header_names_ascii check to reject email with non-ASCII + characters in header names, implemented as a verify condition. + Contributed by Michael Fischer v. Mollard. + +TL/05 Rename SPF condition results err_perm and err_temp to standardized + results permerror and temperror. Previous values are deprecated but + still accepted. In a future release, err_perm and err_temp will be + completely removed, which will be a backward incompatibility if the + ACL tests for either of these two old results. Patch contributed by + user bes-internal on the mailing list. + +JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau. + +JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log + selectors, in both main and reject logs. + +JH/06 Log outbound-TLS and port details, subject to log selectors, for a + failed delivery. + +JH/07 Add malware type "sock" for talking to simple daemon. + +JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport. + +JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in + routers/transports under cutthrough routing. + +JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative + numbers. Touch up "bool" conditional to keep the same definition. + +TL/06 Remove duplicated language in spec file from 4.82 TL/16. + +JH/11 Add dnsdb tlsa lookup. From Todd Lyons. + +JH/12 Expand items in router/transport headers_add or headers_remove lists + individually rather than the list as a whole. Bug 1452. + + Required for reasonable handling of multiple headers_ options when + they may be empty; requires that headers_remove items with embedded + colons must have them doubled (or the list-separator changed). + +TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly + view the policy declared in the DMARC record. Currently, $dmarc_status + is a combined value of both the record presence and the result of the + analysis. + +JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455. + +JH/14 New options dnssec_request_domains, dnssec_require_domains on the + dnslookup router and the smtp transport (applying to the forward + lookup). + +TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list + of ldap servers used for a specific lookup. Patch provided by Heiko + Schlichting. + +JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups. + New variable $lookup_dnssec_authenticated for observability. + +TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use. + Patch submitted by Lars Timman. + +JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459. + +TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim. + Requires trusted mode and valid format message id, aborts otherwise. + Patch contributed by Heiko Schlichting. + +JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item + certextract with support for various fields. Bug 1358. + +JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling + is requested by default, modifiable by smtp transport option + hosts_request_ocsp. + +JH/22 Expansion operators ${md5:string} and ${sha1:string} can now + operate on certificate variables to give certificate fingerprints + Also new ${sha256:cert_variable}. + +JH/23 The PRDR feature is moved from being Experimental into the mainline. + +TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from + Christian Aistleitner. + +JH/24 The OCSP stapling feature is moved from Experimental into the mainline. + +TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool + file. Patch from Wolfgang Breyha. + +JH/25 Expand the coverage of the delivery $host and $host_address to + client authenticators run in verify callout. Bug 1476. + +JH/26 Port service names are now accepted for tls_on_connect_ports, to + align with daemon_smtp_ports. Bug 72. + +TF/03 Fix udpsend. The ip_connectedsocket() function's socket type + support and error reporting did not work properly. + +TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists + and is readable. Patch from Andrew Colin Kissa. + +TL/14 Enhance documentation of ${run expansion and how it parses the + commandline after expansion, particularly in the case when an + unquoted variable expansion results in an empty value. + +JH/27 The TLS SNI feature was broken in 4.82. Fix it. + +PP/02 Fix internal collision of T_APL on systems which support RFC3123 + by renaming away from it. Addresses GH issue 15, reported by + Jasper Wallace. + +JH/28 Fix parsing of MIME headers for parameters with quoted semicolons. + +TL/15 SECURITY: prevent double expansion in math comparison functions + (can expand unsanitized data). Not remotely exploitable. + CVE-2014-2972 + + +Exim version 4.82 +----------------- + +PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities. + +PP/02 Make -n do something, by making it not do something. + When combined with -bP, the name of an option is not output. + +PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured + by GnuTLS. + +PP/04 First step towards DNSSEC, provide $sender_host_dnssec for + $sender_host_name and config options to manage this, and basic check + routines. + +PP/05 DSCP support for outbound connections and control modifier for inbound. + +PP/06 Cyrus SASL: set local and remote IP;port properties for driver. + (Only plugin which currently uses this is kerberos4, which nobody should + be using, but we should make it available and other future plugins might + conceivably use it, even though it would break NAT; stuff *should* be + using channel bindings instead). + +PP/07 Handle "exim -L " to indicate to use syslog with tag as the process + name; added for Sendmail compatibility; requires admin caller. + Handle -G as equivalent to "control = suppress_local_fixups" (we used to + just ignore it); requires trusted caller. + Also parse but ignore: -Ac -Am -X + Bugzilla 1117. + +TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing. + +TL/02 Add +smtp_confirmation as a default logging option. + +TL/03 Bugzilla 198 - Implement remove_header ACL modifier. + Patch by Magnus Holmgren from 2007-02-20. + +TL/04 Bugzilla 1281 - Spec typo. + Bugzilla 1283 - Spec typo. + Bugzilla 1290 - Spec grammar fixes. + +TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation. + +TL/06 Add Experimental DMARC support using libopendmarc libraries. + +TL/07 Fix an out of order global option causing a segfault. Reported to dev + mailing list by by Dmitry Isaikin. + +JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support. + +JH/02 Support "G" suffix to numbers in ${if comparisons. + +PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL. + +NM/01 Bugzilla 1197 - Spec typo + Bugzilla 1196 - Spec examples corrections + +JH/03 Add expansion operators ${listnamed:name} and ${listcount:string} + +PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called + gnutls_enable_pkcs11, but renamed to more accurately indicate its + function. + +PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC. + Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler. + +JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition + "acl {{name}{arg}...}", and optional args on acl condition + "acl = name arg..." + +JH/05 Permit multiple router/transport headers_add/remove lines. + +JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination. + +JH/07 Avoid using a waiting database for a single-message-only transport. + Performance patch from Paul Fisher. Bugzilla 1262. + +JH/08 Strip leading/trailing newlines from add_header ACL modifier data. + Bugzilla 884. + +JH/09 Add $headers_added variable, with content from use of ACL modifier + add_header (but not yet added to the message). Bugzilla 199. + +JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line. + Pulled from Bugzilla 817 by Wolfgang Breyha. + +PP/11 SECURITY: protect DKIM DNS decoding from remote exploit. + CVE-2012-5671 + (nb: this is the same fix as in Exim 4.80.1) + +JH/11 Add A= logging on delivery lines, and a client_set_id option on + authenticators. + +JH/12 Add optional authenticated_sender logging to A= and a log_selector + for control. + +PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29. + +PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not + advertise SMTP AUTH mechanism to us, instead of a generic + protocol violation error. Also, make Exim more robust to bad + data from the Dovecot auth socket. + +TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients. + + When a queue runner is handling a message, Exim first routes the + recipient addresses, during which it prunes them based on the retry + hints database. After that it attempts to deliver the message to + any remaining recipients. It then updates the hints database using + the retry rules. + + So if a recipient address works intermittently, it can get repeatedly + deferred at routing time. The retry hints record remains fresh so the + address never reaches the final cutoff time. + + This is a fairly common occurrence when a user is bumping up against + their storage quota. Exim had some logic in its local delivery code + to deal with this. However it did not apply to per-recipient defers + in remote deliveries, e.g. over LMTP to a separate IMAP message store. + + This change adds a proper retry rule check during routing so that the + final cutoff time is checked against the message's age. We only do + this check if there is an address retry record and there is not a + domain retry record; this implies that previous attempts to handle + the address had the retry_use_local_parts option turned on. We use + this as an approximation for the destination being like a local + delivery, as in LMTP. + + I suspect this new check makes the old local delivery cutoff check + redundant, but I have not verified this so I left the code in place. + +TF/02 Correct gecos expansion when From: is a prefix of the username. + + Test 0254 submits a message to Exim with the header + + Resent-From: f + + When I ran the test suite under the user fanf2, Exim expanded + the header to contain my full name, whereas it should have added + a Resent-Sender: header. It erroneously treats any prefix of the + username as equal to the username. + + This change corrects that bug. + +GF/01 DCC debug and logging tidyup + Error conditions log to paniclog rather than rejectlog. + Debug lines prefixed by "DCC: " to remove any ambiguity. + +TF/03 Avoid unnecessary rebuilds of lookup-related code. + +PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server. + Bug spotted by Jeremy Harris; was flawed since initial commit. + Would have resulted in OCSP responses post-SNI triggering an Exim + NULL dereference and crash. + +JH/13 Add $router_name and $transport_name variables. Bugzilla 308. + +PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd. + Bug detection, analysis and fix by Samuel Thibault. + Bugzilla 1331, Debian bug #698092. + +SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]' + +JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt). + Server implementation by Todd Lyons, client by JH. + Only enabled when compiled with EXPERIMENTAL_PRDR. A new + config variable "prdr_enable" controls whether the server + advertises the facility. If the client requests PRDR a new + acl_data_smtp_prdr ACL is called once for each recipient, after + the body content is received and before the acl_smtp_data ACL. + The client is controlled by bolth of: a hosts_try_prdr option + on the smtp transport, and the server advertisement. + Default client logging of deliveries and rejections involving + PRDR are flagged with the string "PRDR". + +PP/16 Fix problems caused by timeouts during quit ACLs trying to double + fclose(). Diagnosis by Todd Lyons. + +PP/17 Update configure.default to handle IPv6 localhost better. + Patch by Alain Williams (plus minor tweaks). + Bugzilla 880. + +PP/18 OpenSSL made graceful with empty tls_verify_certificates setting. + This is now consistent with GnuTLS, and is now documented: the + previous undocumented portable approach to treating the option as + unset was to force an expansion failure. That still works, and + an empty string is now equivalent. + +PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it + clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag, + not performing validation itself. + +PP/20 Added force_command boolean option to pipe transport. + Patch from Nick Koston, of cPanel Inc. + +JH/15 AUTH support on callouts (and hence cutthrough-deliveries). + Bugzilla 321, 823. + +TF/04 Added udpsend ACL modifer and hexquote expansion operator + +PP/21 Fix eximon continuous updating with timestamped log-files. + Broken in a format-string cleanup in 4.80, missed when I repaired the + other false fix of the same issue. + Report and fix from Heiko Schlichting. + Bugzilla 1363. + +PP/22 Guard LDAP TLS usage against Solaris LDAP variant. + Report from Prashanth Katuri. + +PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options. + It's SecureTransport, so affects any MacOS clients which use the + system-integrated TLS libraries, including email clients. + +PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if + using a MIME ACL for non-SMTP local injection. + Report and assistance in diagnosis by Warren Baker. + +TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver. + +JH/16 Fix comparisons for 64b. Bugzilla 1385. + +TL/09 Add expansion variable $authenticated_fail_id to keep track of + last id that failed so it may be referenced in subsequent ACL's. + +TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by + Alexander Miroch. + +TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls + ldap library initialization, allowing self-signed CA's to be + used. Also properly sets require_cert option later in code by + using NULL (global ldap config) instead of ldap handle (per + session). Bug diagnosis and testing by alxgomz. + +TL/12 Enhanced documentation in the ratelimit.pl script provided in + the src/util/ subdirectory. + +TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau + renamed to Transport Post Delivery Action by Jeremy Harris, as + EXPERIMENTAL_TPDA. + +TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled + when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable + redis_servers = needs to be configured which will be used by the redis + lookup. Patch from Warren Baker, of The Packet Hub. + +TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall. + +TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a + hostname or reverse DNS when processing a host list. Used suggestions + from multiple comments on this bug. + +TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey. + +TL/18 Had previously added a -CONTINUE option to runtest in the test suite. + Missed a few lines, added it to make the runtest require no keyboard + interaction. + +TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite + contains upper case chars. Make router use caseful_local_part. + +TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS + support when GnuTLS has been built with p11-kit. + + +Exim version 4.80.1 +------------------- + +PP/01 SECURITY: protect DKIM DNS decoding from remote exploit. + CVE-2012-5671 + This, or similar/improved, will also be change PP/11 of 4.82. + + +Exim version 4.80 +----------------- + +PP/01 Handle short writes when writing local log-files. + In practice, only affects FreeBSD (8 onwards). + Bugzilla 1053, with thanks to Dmitry Isaikin. + +NM/01 Bugzilla 949 - Documentation tweak + +NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps + improved. + +NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs. + +PP/02 Implemented gsasl authenticator. + +PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option. + +PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use + `pkg-config foo` for cflags/libs. + +PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent + with rest of GSASL and with heimdal_gssapi. + +PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use + `pkg-config foo` for cflags/libs for the TLS implementation. + +PP/07 New expansion variable $tls_bits; Cyrus SASL server connection + properties get this fed in as external SSF. A number of robustness + and debugging improvements to the cyrus_sasl authenticator. + +PP/08 cyrus_sasl server now expands the server_realm option. + +PP/09 Bugzilla 1214 - Log authentication information in reject log. + Patch by Jeremy Harris. + +PP/10 Added dbmjz lookup type. + +PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid. + +PP/12 MAIL args handles TAB as well as SP, for better interop with + non-compliant senders. + Analysis and variant patch by Todd Lyons. + +NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated + Bug report from Lars Müller (via SUSE), + Patch from Dirk Mueller + +PP/13 tls_peerdn now print-escaped for spool files. + Observed some $tls_peerdn in wild which contained \n, which resulted + in spool file corruption. + +PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options" + values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read + or write after TLS renegotiation, which otherwise led to messages + "Got SSL error 2". + +TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted + as a tracking header (ie: a signed header comes before the signature). + Patch from Wolfgang Breyha. + +JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a + comma-sep list; embedded commas doubled. + +JH/02 Refactored ACL "verify =" logic to table-driven dispatch. + +PP/15 LDAP: Check for errors of TLS initialisation, to give correct + diagnostics. + Report and patch from Dmitry Banschikov. + +PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options". + Removed SSL_clear() after SSL_new() which led to protocol negotiation + failures. We appear to now support TLS1.1+ with Exim. + +PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate + lets Exim select keys and certificates based upon TLS SNI from client. + Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly + before an outbound SMTP session. New log_selector, +tls_sni. + +PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid + NULL dereference. Report and patch from Alun Jones. + +PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage + on less well tested platforms). Obviates NetBSD pkgsrc patch-ac. + Not seeing resolver debug output on NetBSD, but suspect this is a + resolver implementation change. + +PP/20 Revert part of NM/04, it broke log_path containing %D expansions. + Left warnings. Added "eximon gdb" invocation mode. + +PP/21 Defaulting "accept_8bitmime" to true, not false. + +PP/22 Added -bw for inetd wait mode support. + +PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to + locate the relevant includes and libraries. Made this the default. + +PP/24 Fixed headers_only on smtp transports (was not sending trailing dot). + Bugzilla 1246, report and most of solution from Tomasz Kusy. + +JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m"). + This may cause build issues on older platforms. + +PP/25 Revamped GnuTLS support, passing tls_require_ciphers to + gnutls_priority_init, ignoring Exim options gnutls_require_kx, + gnutls_require_mac & gnutls_require_protocols (no longer supported). + Added SNI support via GnuTLS too. + Made ${randint:..} supplier available, if using not-too-old GnuTLS. + +PP/26 Added EXPERIMENTAL_OCSP for OpenSSL. + +PP/27 Applied dnsdb SPF support patch from Janne Snabb. + Applied second patch from Janne, implementing suggestion to default + multiple-strings-in-record handling to match SPF spec. + +JH/04 Added expansion variable $tod_epoch_l for a higher-precision time. + +PP/28 Fix DCC dcc_header content corruption (stack memory referenced, + read-only, out of scope). + Patch from Wolfgang Breyha, report from Stuart Northfield. + +PP/29 Fix three issues highlighted by clang analyser static analysis. + Only crash-plausible issue would require the Cambridge-specific + iplookup router and a misconfiguration. + Report from Marcin Mirosław. + +PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy. + +PP/31 %D in printf continues to cause issues (-Wformat=security), so for + now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS. + As part of this, removing so much warning spew let me fix some minor + real issues in debug logging. + +PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing + assignment on my part. Fixed. + +PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit + of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by + Janne Snabb (who went above and beyond: thank you). + +PP/34 Validate tls_require_ciphers on startup, since debugging an invalid + string otherwise requires a connection and a bunch more work and it's + relatively easy to get wrong. Should also expose TLS library linkage + problems. + +PP/35 Pull in on Linux, for some portability edge-cases of + 64-bit ${eval} (JH/03). + +PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of + GNU libc to support some of the 64-bit stuff, should not lead to + conflicts. Defined before os.h is pulled in, so if a given platform + needs to override this, it can. + +PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought + protection layer was required, which is not implemented. + Bugzilla 1254, patch from Wolfgang Breyha. + +PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built + into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make + tls_dhparam take prime identifiers. Also unbreak combination of + OpenSSL+DH_params+TLSSNI. + +PP/39 Disable SSLv2 by default in OpenSSL support. + + +Exim version 4.77 +----------------- + +PP/01 Solaris build fix for Oracle's LDAP libraries. + Bugzilla 1109, patch from Stephen Usher. + +TF/01 HP/UX build fix: avoid arithmetic on a void pointer. + +TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o + whitespace trailer + +TF/02 Fix a couple more cases where we did not log the error message + when unlink() failed. See also change 4.74-TF/03. + +TF/03 Make the exiwhat support code safe for signals. Previously Exim might + lock up or crash if it happened to be inside a call to libc when it + got a SIGUSR1 from exiwhat. + + The SIGUSR1 handler appends the current process status to the process + log which is later printed by exiwhat. It used to use the general + purpose logging code to do this, but several functions it calls are + not safe for signals. + + The new output code in the SIGUSR1 handler is specific to the process + log, and simple enough that it's easy to inspect for signal safety. + Removing some special cases also simplifies the general logging code. + Removing the spurious timestamps from the process log simplifies + exiwhat. + +TF/04 Improved ratelimit ACL condition. + + The /noupdate option has been deprecated in favour of /readonly which + has clearer semantics. The /leaky, /strict, and /readonly update modes + are mutually exclusive. The update mode is no longer included in the + database key; it just determines when the database is updated. (This + means that when you upgrde Exim will forget old rate measurements.) + + Exim now checks that the per_* options are used with an update mode that + makes sense for the current ACL. For example, when Exim is processing a + message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify + per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you + must specify per_mail/readonly. If you omit the update mode it defaults to + /leaky where that makes sense (as before) or /readonly where required. + + The /noupdate option is now undocumented but still supported for + backwards compatibility. It is equivalent to /readonly except that in + ACLs where /readonly is required you may specify /leaky/noupdate or + /strict/noupdate which are treated the same as /readonly. + + A useful new feature is the /count= option. This is a generalization + of the per_byte option, so that you can measure the throughput of other + aggregate values. For example, the per_byte option is now equivalent + to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }. + + The per_rcpt option has been generalized using the /count= mechanism + (though it's more complicated than the per_byte equivalence). When it is + used in acl_smtp_rcpt, the per_rcpt option adds recipients to the + measured rate one at a time; if it is used later (e.g. in acl_smtp_data) + or in a non-SMTP ACL it adds all the recipients in one go. (The latter + /count=$recipients_count behaviour used to work only in non-SMTP ACLs.) + Note that using per_rcpt with a non-readonly update mode in more than + one ACL will cause the recipients to be double-counted. (The per_mail + and per_byte options don't have this problem.) + + The handling of very low rates has changed slightly. If the computed rate + is less than the event's count (usually one) then this event is the first + after a long gap. In this case the rate is set to the same as this event's + count, so that the first message of a spam run is counted properly. + + The major new feature is a mechanism for counting the rate of unique + events. The new per_addr option counts the number of different + recipients that someone has sent messages to in the last time period. It + behaves like per_rcpt if all the recipient addresses are different, but + duplicate recipient addresses do not increase the measured rate. Like + the /count= option this is a general mechanism, so the per_addr option + is equivalent to per_rcpt/unique=$local_part@$domain. You can, for + example, measure the rate that a client uses different sender addresses + with the options per_mail/unique=$sender_address. There are further + details in the main documentation. + +TF/05 Removed obsolete $Cambridge$ CVS revision strings. + +TF/06 Removed a few PCRE remnants. + +TF/07 Automatically extract Exim's version number from tags in the git + repository when doing development or release builds. + +PP/02 Raise smtp_cmd_buffer_size to 16kB. + Bugzilla 879. Patch from Paul Fisher. + +PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport. + Heavily based on revision 40f9a89a from Simon Arlott's tree. + Bugzilla 97. + +PP/04 Use .dylib instead of .so for dynamic library loading on MacOS. + +PP/05 Variable $av_failed, true if the AV scanner deferred. + Bugzilla 1078. Patch from John Horne. + +PP/06 Stop make process more reliably on build failure. + Bugzilla 1087. Patch from Heiko Schlittermann. + +PP/07 Make maildir_use_size_file an _expandable_ boolean. + Bugzilla 1089. Patch from Heiko Schlittermann. + +PP/08 Handle ${run} returning more data than OS pipe buffer size. + Bugzilla 1131. Patch from Holger Weiß. + +PP/09 Handle IPv6 addresses with SPF. + Bugzilla 860. Patch from Wolfgang Breyha. + +PP/10 GnuTLS: support TLS 1.2 & 1.1. + Bugzilla 1156. + Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler]. + Bugzilla 1095. + +PP/11 match_* no longer expand right-hand-side by default. + New compile-time build option, EXPAND_LISTMATCH_RHS. + New expansion conditions, "inlist", "inlisti". + +PP/12 fix uninitialised greeting string from PP/03 (smtps client support). + +PP/13 shell and compiler warnings fixes for RC1-RC4 changes. + +PP/14 fix log_write() format string regression from TF/03. + Bugzilla 1152. Patch from Dmitry Isaikin. + Exim version 4.76 ----------------- @@ -11,6 +1311,36 @@ PP/01 The new ldap_require_cert option would segfault if used. Fixed. PP/02 Harmonised TLS library version reporting; only show if debugging. Layout now matches that introduced for other libraries in 4.74 PP/03. +PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1 + +PP/04 New "dns_use_edns0" global option. + +PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid. + Bugzilla 1098. + +PP/06 Extra paranoia around buffer usage at the STARTTLS transition. + nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316 + +TK/01 Updated PolarSSL code to 0.14.2. + Bugzilla 1097. Patch from Andreas Metzler. + +PP/07 Catch divide-by-zero in ${eval:...}. + Fixes bugzilla 1102. + +PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed. + Bugzilla 1104. + +TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a + format-string attack -- SECURITY: remote arbitrary code execution. + +TK/03 SECURITY - DKIM signature header parsing was double-expanded, second + time unintentionally subject to list matching rules, letting the header + cause arbitrary Exim lookups (of items which can occur in lists, *not* + arbitrary string expansion). This allowed for information disclosure. + +PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to + INT_MIN/-1 -- value coerced to INT_MAX. + Exim version 4.75 ----------------- @@ -232,7 +1562,7 @@ DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim run-time user, instead of root. -PP/28 Add WHITELIST_D_MACROS option to let some macros be overriden by the +PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the Exim run-time user without dropping privileges. DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the @@ -451,7 +1781,7 @@ NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --" NM/33 Bugzilla 898: Transport filter timeout fix. Patch by Todd Rinaldo. -NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches. +NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches. Patch by Serge Demonchaux. NM/35 Bugzilla 39: Base64 decode bug fixes.