Macros: return macro-presence status from "exim -bP macro <name>"

[users/jgh/exim.git] / doc / doc-txt / NewStuff

diff --git a/doc/doc-txt/NewStuff b/doc/doc-txt/NewStuff
index 33b726536780db2317104061633740fccdfd8913..e123910c2e16a055f5a23768775b839643b07dac 100644 (file)
--- a/doc/doc-txt/NewStuff
+++ b/doc/doc-txt/NewStuff
@@ -3,9 +3,119 @@ 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
 
 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.
 
 the documentation is updated, this file is reduced to a short list.
 

+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 (adding to the
+    previous OpenSSL implementation, but still Experimental).
+
+ 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=<domain>" 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:<string>} / ${sha3_<N>:<string>} 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 later.
+
+10. Builtin feature-macros _CRYPTO_HASH_SHA3 and _CRYPTO_SIGN_ED25519, library
+    version dependent.
+
+11. "exim -bP macro <name>" returns caller-usable status.
+
+
+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 corrution issue is suspected on a production system.
+
+

 Version 4.88
 ------------
 
 Version 4.88
 ------------
 


@@ -21,7 +131,7 @@ Version 4.88
     N can be 224, 256 (default), 384, 512.
     With GnuTLS 3.5.0 or later, only.
 
     N can be 224, 256 (default), 384, 512.
     With GnuTLS 3.5.0 or later, only.
 

- 5. Facility for named queues:  A commandline argument can specify
+ 5. Facility for named queues:  A command-line argument can specify

     the queue name for a queue operation, and an ACL modifier can set
     the queue to be used for a message.  A $queue_name variable gives
     visibility.
     the queue name for a queue operation, and an ACL modifier can set
     the queue to be used for a message.  A $queue_name variable gives
     visibility.


@@ -38,8 +148,10 @@ Version 4.88
  9. Expansion operator escape8bit, like escape but not touching newline etc..
 
 10. Feature macros, generated from compile options.  All start with "_HAVE_"
  9. Expansion operator escape8bit, like escape but not touching newline etc..
 
 10. Feature macros, generated from compile options.  All start with "_HAVE_"

-    and go on with some roughly recognisable name.  Use the "-bP macros"
-    command-line option to see what is present.
+    and go on with some roughly recognisable name.  Driver macros, for
+    router, transport and authentication drivers; names starting with "_DRIVER_".
+    Option macros, for each configuration-file option; all start with "_OPT_".
+    Use the "-bP macros" command-line option to see what is present.

 
 11. Integer values for options can take a "G" multiplier.
 
 
 11. Integer values for options can take a "G" multiplier.
 


@@ -47,6 +159,22 @@ Version 4.88
     returns from the target back to the initiator, rather than spooling the
     message.
 
     returns from the target back to the initiator, rather than spooling the
     message.
 

+13. New built-in constants available for tls_dhparam and default changed.
+
+14. If built with EXPERIMENTAL_QUEUEFILE, a queuefile transport, for writing
+    out copies of the message spool files for use by 3rd-party scanners.
+
+15. A new option on the smtp transport, hosts_try_fastopen.  If the system
+    supports it (on Linux it must be enabled in the kernel by the sysadmin)
+    try to use RFC 7413 "TCP Fast Open".  No data is sent on the SYN segment
+    but it permits a peer that also supports the facility to send its SMTP
+    banner immediately after the SYN,ACK segment rather then waiting for
+    another ACK - so saving up to one roundtrip time.  Because it requires
+    previous communication with the peer (we save a cookie from it) this
+    will only become active on frequently-contacted destinations.
+
+16. A new syslog_pid option to suppress PID duplication in syslog lines.
+

 
 Version 4.87
 ------------
 
 Version 4.87
 ------------


@@ -74,7 +202,7 @@ Version 4.87
     synonym of the latter).  Add support in base64 for certificates.
 
  8. New main configuration option "bounce_return_linesize_limit" to
     synonym of the latter).  Add support in base64 for certificates.
 
  8. New main configuration option "bounce_return_linesize_limit" to

-    avoid oversize bodies in bounces. The dafault value matches RFC
+    avoid oversize bodies in bounces. The default value matches RFC

     limits.
 
  9. New $initial_cwd expansion variable.
     limits.
 
  9. New $initial_cwd expansion variable.


@@ -94,7 +222,7 @@ Version 4.86
 
  5. Assorted options on malware= and spam= scanners.
 
 
  5. Assorted options on malware= and spam= scanners.
 

- 6. A commandline option to write a comment into the logfile.
+ 6. A command-line option to write a comment into the logfile.

 
  7. If built with EXPERIMENTAL_SOCKS feature enabled, the smtp transport can
     be configured to make connections via socks5 proxies.
 
  7. If built with EXPERIMENTAL_SOCKS feature enabled, the smtp transport can
     be configured to make connections via socks5 proxies.


@@ -122,7 +250,7 @@ Version 4.85
 ------------
 
  1. If built with EXPERIMENTAL_DANE feature enabled, Exim will follow the
 ------------
 
  1. If built with EXPERIMENTAL_DANE feature enabled, Exim will follow the

-    DANE smtp draft to assess a secure chain of trust of the certificate
+    DANE SMTP draft to assess a secure chain of trust of the certificate

     used to establish the TLS connection based on a TLSA record in the
     domain of the sender.
 
     used to establish the TLS connection based on a TLSA record in the
     domain of the sender.
 


@@ -189,7 +317,7 @@ Version 4.83
 12. OCSP stapling is now supported by default.
 
 13. If built with the EXPERIMENTAL_DSN feature enabled, Exim will output
 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.
 
 
     DSN features per RFC 3461.
 
 


@@ -244,20 +372,20 @@ Version 4.82
     ignored.
 
  7. New cutthrough routing feature.  Requested by a "control = cutthrough_delivery"
     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
     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.
 
     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 "=>".
     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 "=>".


@@ -318,7 +446,7 @@ Version 4.82
 16. New authenticated_sender logging option, adding to log field "A".
 
 17. New expansion variables $router_name and $transport_name.  Useful
 16. New authenticated_sender logging option, adding to log field "A".
 
 17. New expansion variables $router_name and $transport_name.  Useful

-    particularly for debug_print as -bt commandline option does not
+    particularly for debug_print as -bt command-line option does not

     require privilege whereas -d does.
 
 18. If built with EXPERIMENTAL_PRDR, per-recipient data responses per a
     require privilege whereas -d does.
 
 18. If built with EXPERIMENTAL_PRDR, per-recipient data responses per a


@@ -336,13 +464,14 @@ 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
     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).
 
 
 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
     UDP host and port.
 
 24. New ${hexquote:..string..} expansion operator converts non-printable