X-Git-Url: https://git.exim.org/users/jgh/exim.git/blobdiff_plain/383832efc13b2027e89426a952430158028a3b0f..21aa05977abff1eaa69bb97ef99080220915f7c0:/doc/doc-txt/NewStuff?ds=sidebyside diff --git a/doc/doc-txt/NewStuff b/doc/doc-txt/NewStuff index ee9589801..a416b8c1f 100644 --- a/doc/doc-txt/NewStuff +++ b/doc/doc-txt/NewStuff @@ -3,9 +3,189 @@ New Features in Exim This file contains descriptions of new features that have been added to Exim. Before a formal release, there may be quite a lot of detail so that people can -test from the snapshots or the CVS before the documentation is updated. Once +test from the snapshots or the Git before the documentation is updated. Once the documentation is updated, this file is reduced to a short list. +Version 4.93 +------------ + + 1. An "external" authenticator, per RFC 4422 Appendix A. + + 2. A JSON lookup type, and JSON variants of the forall/any expansion conditions. + + 3. Variables $tls_in_cipher_std, $tls_out_cipher_std giving the RFC names + for ciphersuites. + + 4. Log_selectors "msg_id" (on by default) and "msg_id_created". + + 5. A case_insensitive option for verify=not_blind. + + 6. EXPERIMENTAL_TLS_RESUME optional build feature. See the experimental.spec + file. + + 7. A main option exim_version to override the version Exim + reports in verious places ($exim_version, $version_number). + + 8. Expansion operator ${sha2_N:} for N=256, 384, 512. + + 9. Router variables, $r_... settable from router options and usable in routers + and transports. + + +Version 4.92 +-------------- + + 1. ${l_header:} and ${l_h:} expansion items, giving a colon-sep + list when there are multiple headers having a given name. This matters + when individual headers are wrapped onto multiple lines; with previous + facilities hard to parse. + + 2. The ${readsocket } expansion item now takes a "tls" option, doing the + obvious thing. + + 3. EXPERIMENTAL_REQUIRETLS and EXPERIMENTAL_PIPE_CONNECT optional build + features. See the experimental.spec file. + + 4. If built with SUPPORT_I18N a "utf8_downconvert" option on the smtp transport. + + 5. A "pipelining" log_selector. + + 6. Builtin macros for supported log_selector and openssl_options values. + + 7. JSON variants of the ${extract } expansion item. + + 8. A "noutf8" debug option, for disabling the UTF-8 characters in debug output. + + 9. TCP Fast Open support on MacOS. + +Version 4.91 +-------------- + + 1. Dual-certificate stacks on servers now support OCSP stapling, under GnuTLS + version 3.5.6 or later. + + 2. DANE is now supported under GnuTLS version 3.0.0 or later. Both GnuTLS and + OpenSSL versions are moved to mainline support from Experimental. + New SMTP transport option "dane_require_tls_ciphers". + + 3. Feature macros for the compiled-in set of malware scanner interfaces. + + 4. SPF support is promoted from Experimental to mainline status. The template + src/EDITME makefile does not enable its inclusion. + + 5. Logging control for DKIM verification. The existing DKIM log line is + controlled by a "dkim_verbose" selector which is _not_ enabled by default. + A new tag "DKIM=" is added to <= lines by default, controlled by + a "dkim" log_selector. + + 6. Receive duration on <= lines, under a new log_selector "receive_time". + + 7. Options "ipv4_only" and "ipv4_prefer" on the dnslookup router and on + routing rules in the manualroute router. + + 8. Expansion item ${sha3:} / ${sha3_:} now also supported + under OpenSSL version 1.1.1 or later. + + 9. DKIM operations can now use the Ed25519 algorithm in addition to RSA, under + GnuTLS 3.6.0 or OpenSSL 1.1.1 or later. + +10. Builtin feature-macros _CRYPTO_HASH_SHA3 and _CRYPTO_SIGN_ED25519, library + version dependent. + +11. "exim -bP macro " returns caller-usable status. + +12. Expansion item ${authresults {}} for creating an + Authentication-Results: header. + +13. EXPERIMENTAL_ARC. See the experimental.spec file. + See also new util/renew-opendmarc-tlds.sh script for use with DMARC/ARC. + +14: A dane:fail event, intended to facilitate reporting. + +15. "Lightweight" support for Redis Cluster. Requires redis_servers list to + contain all the servers in the cluster, all of which must be reachable from + the running exim instance. If the cluster has master/slave replication, the + list must contain all the master and slave servers. + +16. Add an option to the Avast scanner interface: "pass_unscanned". This + allows to treat unscanned files as clean. Files may be unscanned for + several reasons: decompression bombs, broken archives. + + +Version 4.90 +------------ + + 1. PKG_CONFIG_PATH can now be set in Local/Makefile; + wildcards will be expanded, values are collapsed. + + 2. The ${readsocket } expansion now takes an option to not shutdown the + connection after sending the query string. The default remains to do so. + + 3. An smtp transport option "hosts_noproxy_tls" to control whether multiple + deliveries on a single TCP connection can maintain a TLS connection + open. By default disabled for all hosts, doing so saves the cost of + making new TLS sessions, at the cost of having to proxy the data via + another process. Logging is also affected. + + 4. A malware connection type for the FPSCAND protocol. + + 5. An option for recipient verify callouts to hold the connection open for + further recipients and for delivery. + + 6. The reproducible build $SOURCE_DATE_EPOCH environment variable is now + supported. + + 7. Optionally, an alternate format for spool data-files which matches the + wire format - meaning more efficient reception and transmission (at the + cost of difficulty with standard Unix tools). Only used for messages + received using the ESMTP CHUNKING option, and when a new main-section + option "spool_wireformat" (false by default) is set. + + 8. New main configuration option "commandline_checks_require_admin" to + restrict who can use various introspection options. + + 9. New option modifier "no_check" for quota and quota_filecount + appendfile transport. + +10. Variable $smtp_command_history returning a comma-sep list of recent + SMTP commands. + +11. Millisecond timetamps in logs, on log_selector "millisec". Also affects + log elements QT, DT and D, and timstamps in debug output. + +12. TCP Fast Open logging. As a server, logs when the SMTP banner was sent + while still in SYN_RECV state; as a client logs when the connection + is opened with a TFO cookie. + +13. DKIM support for multiple signing, by domain and/or key-selector. + DKIM support for multiple hashes, and for alternate-identity tags. + Builtin macro with default list of signed headers. + Better syntax for specifying oversigning. + The DKIM ACL can override verification status, and status is visible in + the data ACL. + +14. Exipick understands -C|--config for an alternative Exim + configuration file. + +15. TCP Fast Open used, with data-on-SYN, for client SMTP via SOCKS5 proxy, + for ${readsocket } expansions, and for ClamAV. + +16. The "-be" expansion test mode now supports macros. Macros are expanded + in test lines, and new macros can be defined. + +17. Support for server-side dual-certificate-stacks (eg. RSA + ECDSA). + + +Version 4.89 +------------ + + 1. Allow relative config file names for ".include" + + 2. A main-section config option "debug_store" to control the checks on + variable locations during store-reset. Normally false but can be enabled + when a memory corruption issue is suspected on a production system. + + Version 4.88 ------------ @@ -207,7 +387,7 @@ Version 4.83 12. OCSP stapling is now supported by default. 13. If built with the EXPERIMENTAL_DSN feature enabled, Exim will output - Delivery Status Notification messages in MIME format, and negociate + Delivery Status Notification messages in MIME format, and negotiate DSN features per RFC 3461. @@ -262,20 +442,20 @@ Version 4.82 ignored. 7. New cutthrough routing feature. Requested by a "control = cutthrough_delivery" - ACL modifier; works for single-recipient mails which are recieved on and + ACL modifier; works for single-recipient mails which are received on and deliverable via SMTP. Using the connection made for a recipient verify, if requested before the verify, or a new one made for the purpose while the inbound connection is still active. The bulk of the mail item is copied direct from the inbound socket to the outbound (as well as the spool file). When the source notifies the end of data, the data acceptance by the destination - is negociated before the acceptance is sent to the source. If the destination + is negotiated before the acceptance is sent to the source. If the destination does not accept the mail item, for example due to content-scanning, the item is not accepted from the source and therefore there is no need to generate a bounce mail. This is of benefit when providing a secondary-MX service. The downside is that delays are under the control of the ultimate destination system not your own. - The Recieved-by: header on items delivered by cutthrough is generated + The Received-by: header on items delivered by cutthrough is generated early in reception rather than at the end; this will affect any timestamp included. The log line showing delivery is recorded before that showing reception; it uses a new ">>" tag instead of "=>". @@ -354,13 +534,14 @@ Version 4.82 It adds new expansion variables $dmarc_ar_header, $dmarc_status, $dmarc_status_text, and $dmarc_used_domain. It adds a new acl modifier dmarc_status. It adds new control flags dmarc_disable_verify and - dmarc_enable_forensic. + dmarc_enable_forensic. The default for the dmarc_tld_file option is + "/etc/exim/opendmarc.tlds" and can be changed via EDITME. 22. Add expansion variable $authenticated_fail_id, which is the username provided to the authentication method which failed. It is available for use in subsequent ACL processing (typically quit or notquit ACLs). -23. New ACL modifer "udpsend" can construct a UDP packet to send to a given +23. New ACL modifier "udpsend" can construct a UDP packet to send to a given UDP host and port. 24. New ${hexquote:..string..} expansion operator converts non-printable @@ -795,7 +976,7 @@ Version 4.68 longest line that was received as part of the message, not counting the line termination character(s). - 7. Host lists can now include +ignore_defer and +include_defer, analagous to + 7. Host lists can now include +ignore_defer and +include_defer, analogous to +ignore_unknown and +include_unknown. These options should be used with care, probably only in non-critical host lists such as whitelists.