** New operation mode: proxy

** Command line option precedence

Command line options take precedence over configuration file
statements.

** elif statement

A familiar `elif' statement is supported, e.g.:

if condition-1
  action-list-1
elif condition-2
  action-list-2
elif condition-3
  action-list-3
else
  action-list-4
fi
  
** New CONTROL statement esmtp-auth-delayed.

When set to `yes', this statement instructs Anubis to postpone ESMTP
authentication until MAIL command is issued by the client.  This
allows to change authentication credentials in the SMTP section (see
below).

** SMTP section

The new section "SMTP" is invoked each time an SMTP command
is received. This section may alter the command's argument, using the
"modify command", e.g.:

BEGIN SMTP
regex :extended
modify command [ehlo] "foo.bar.net"
if command ["mail from:"] "<(.*)>(.*)"
  modify command ["mail from:"] "<root@bar.net>\2"
fi
END

It is also allowed to use esmtp-* keywords in this section, provided
that `esmtp-auth-delayed yes' is set in the CONTROL section. Changes
in the ESMTP authentication credentials take effect if they occur
either before receiving MAIL command from the client, or when handling
this command, e.g.:

BEGIN SMTP
if command ["mail from:"] "<smith(\+.*)?@@example.net>"
  esmtp-auth-id smith
  esmtp-password guessme
else
  esmtp-auth no
fi
END

** New keywords: log-facility and log-tag

** Guile output

By default Scheme's standard error and output ports are redirected to
syslog, using priorities `err' and `warning' correspondingly.

** MySQL options file

When using MySQL for Anubis user database, the database parameters and
access credentials are read from the file /etc/my.cnf, section
"anubis".  Additionally, two URL parameters are provided:
"options-file", which sets the name of the options file, and
"options-group", which sets the name of the group.

* Filters and filter pipes

A "filter" is a mailutils entity which converts its input to output
using a predefined set of rules.  Filters are used to implement such
basic conversions as base64 and quoted-printable.

A "filter pipe" is a string consisting of filter invocations delimited
by pipe characters ('|').  Each invocation is a filter name optionally
followed by a comma-separated list of parameters.

Filter pipes are passed in string arguments to various MFL functions
in order to perform string data conversions.

Filter pipes are described in detail in the Section 5.7 "Filtering
functions" of the Mailfromd Manual.

* Decoding MIME messages 

Please refer to the subsection 5.18.3, "MIME functions" in the Mailfromd
Manual for a detailed description of the functions below.

** New functions

- string filter_string (string input, string filter_pipe)

  Transforms the string input using filters defined in filter_pipe
  and returns the result. 

- void filter_fd (number src_fd, number dst_fd, string filter_pipe)

  Reads data from file descriptor src_fd, passes it through filters
  defined in filter_pipe and writes the result to the file descriptor
  dst_fd

- string message_content_type (number nmsg)

  Returns the content type of the message or message part, identified by
  its argument.

- number message_body_decode (number nmsg)
  (module mime.mf)

  Decodes the body of the message or message part nmsg.

- number message_part_decode(number nmsg, number part)
  (module mime.mf)

  Decodes the body of the given part of a MIME message.

** Changes to message_body_to_stream

Optional third argument contains a filter pipe, which will be applied
to the data obtained from body before passing it to the output stream.
Special filter "mimedecode" is defined, which decodes the data in
accordance with the message content transfer encoding.  

* Improved mailbox locking

This fixes several bugs.

* Changes in the 'locking' configuration statement.

New statement 'type' configures the type of locking to use.  Possible
values are: 'default', 'dotlock', 'external', 'kernel', and 'null'.

New statement 'pid-check' instructs mailutils to check if the PID of
the process owning the lock still exists in the process table.  If it
doesn't the lock is considered stale and is removed.

The 'flags' statement is deprecated.  If used, an error message is
issued along with a suggestion on what statement to use instead:

   Flag     Statement to use
  --------+-------------------
    E       type external     
    R       retry-count N
    T       expire-timeout N
    P       pid-check true

The 'retry-timeout' statement is a misnomer and is therefore
deprecated.  Use 'retry-sleep' instead.

* mail utility

** Fix semantics of mail sending and saving commands

** Fix the -F option

** Improve POSIX mailx compatible mode

** Compose escapes are recognized only in interactive mode

This fixes https://savannah.gnu.org/bugs/?60937

** New mail variables

  - fullnames
      Controls whether personal parts of emails are preserved in
      recipient addresses when replying.  Default is true.
  - outfilename
      Defines the algorithm to convert the recipient email to the
      name of the file used to record outgoing messages to that
      recipient.  This affects the following commands: Copy,
      Save, Mail, followup, and Followup.  This is a string variable,
      that can take one of the following values:
        "local"  - Local part of the email address is taken as the
	           file name.  This is the default.
	"email"  - Entire email is takes as the file name.
	"domain" - Domain part of the email is used as the file name.
  - useragent
      When set, the User-Agent header will be added to each outgoing
      message.  This is the default.
      The use of X-Mailer header has been discontinued.

* Bugfixes

** QP decoder:  Accept soft line breaks (RFC 2045, 6.7, page 19).

** Fix stream reference policy in filter streams.

** Various bugfixes in IMAP client.

** Fix handling of single-path MIME messages.

* Support for Guile 2.2

* Bugfixes

* Improved testsuite

* Requires Mailutils 3.4