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GNU mailutils NEWS -- history of user-visible changes. 2009-12-29
Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free
Software Foundation, Inc.
See the end of file for copying conditions.

Please send mailutils bug reports to <bug-mailutils@gnu.org>.


Version 2.1.90 (Git)

See git log.


Version 2.1 "Ten Years Later" - 2009-09-10:

This release marks the 10 years anniversary of GNU Mailutils.

* New distribution tarballs

Mailutils tar archives are distributed in four compressed formats:
gzip, bzip2, lzma and xz.

* Ticket files

All MU client utilities make use of the user ticket file,
~/.mu-tickets, if it is present.

* Imap4d

New configuration file entities allow to modify user's personal
namespace (the `personal-namespace' statement) and visible home
directory (the `homedir' statement). 

* Movemail

When called with the `--uidl' command line option, the utility tries
to avoid copying the message if a message with the same UIDL already
exists in the destination mailbox.

The `--verbose' command line option enables additional informational
output.

The `--owner' command line option (and the corresponding
`mailbox-ownership' configuration file statement) instructs movemail
to copy mailbox ownership, if the utility is run with root privileges.

* Maidag

Improved scripting capability allows to use mail filters written in
the Python language.

The `--script' command line option sets the name pattern for
user-defined mail filters. Maidag uses the script suffix to
deduce what language it is written in. Supported suffixes are:
`sv', `siv' and `sieve' for Sieve, `scm' and `scheme' for Scheme,
`py' and `pyc' for Python. Additionally, the language may be
defined using the `--language' command line option.

* Mail

** The -f option

The semantics of -f (--file) option fully complies to the POSIX
standard. Namely, this option instructs mail to read messages
from the file named by the first non-optional command line
argument. Therefore, the following four usage patterns are
entirely equivalent:

  mail -fin mymbox
  mail -f mymbox -in
  mail --file -in mymbox
  mail --file -i mymbox -n

In addition, the form

  mail --file=mymbox

is also allowed.  

** The -F option

The -F option (record outgoing messages in a file named after the
first recipient) is implemented.

** struct command

The st[ruct] command lists MIME structures of the message or messages, e.g.:

& struct 2
2[1]  text/plain                 513
2[2]  application/octal-stream  247K
2[3]  text/x-diff                31K

** error locations

Diagnostic messages issued while processing `source' command
include file locations, in compliance with the GNU standards. This
also includes diagnostics issued while parsing the system or user
configuration files.

** envelope command

The env[elope] command displays the SMTP envelopes of the messages
given as its arguments.

** variable command

The va[riable] command describes the known internal mail variables.
When used with arguments, only variables named in the command line are
described.

For each variable, this command prints its name, data type, current
value and a short description.

** headline variable

The headline variable holds a format string to use for the header
summary. Its format is mostly compatible with that of the `nail'
mail reader.

** showenvelope variable

If the `showenvelope' variable is set, print command will include the
SMTP envelope in its output.

** fromfield variable

The `fromfield' boolean variable, if set, instructs mail to obtain
the sender address from the `From:' header.  This is the default.
If unset, the sender address is obtained from the SMTP envelope.

** variable-strict variable

Setting this variable enables strict control over variable
settings. In this mode, mail prints warning if a user is trying to
set an unknown variable and refuses to set read-only variables.

** variable-pretty-print variable

If this variable is set, the `set' listing prints short
descriptions before each variable.

* New interfaces

** Python interface

Mailutils now comes with the Python API. See examples/python/*, for
examples on how to use it.

** C++ interface

The C++ API is built by default, if a c++ compiler is available.

* Support for Tokyo Cabinet DBM.

Tokyo Cabinet is a modern implementation of DBM, developed as the
successor of GDBM and QDBM.  It is written in the C language,
available on platforms which have API conforming to C99 and POSIX.
Tokyo Cabinet is a free software licensed under the GNU Lesser General
Public License.

* API

* New library naming scheme

The names of all mailutils inferior libraries are prefixed with
`libmu_', e.g.: libmu_sieve, libmu_imap, etc. In particular,
`libsieve' is now named `libmu_sieve' and `libcfg' - `libmu_cfg'.

* Wicket/Ticket functions

The wicket/ticket support is rewritten from scratch.

A `wicket' is an object that supplies authentication tickets. The
following user-level functions are available for manipulating
wickets:

- int mu_file_wicket_create (mu_wicket_t *pwicket, const char *filename);

Creates a wicket associated with the ticket file `filename'

- int mu_wicket_get_ticket (mu_wicket_t wicket, const char *user,
	                    mu_ticket_t *pticket);

Obtains authentication ticket for the given user.

- void mu_wicket_destroy (mu_wicket_t *pwicket);

Destroys the wicket and releases any resources associated with it.

A `ticket' is used to obtain user authentication credentials:

- int mu_ticket_get_cred (mu_ticket_t ticket,
			  mu_url_t url, const char *challenge,
			  char **pplain, mu_secret_t *psec);

Obtain plaintext and secret credentials for the given URL and
(optional) authentication challenge. Usually, the plaintext credential
is a user name, and secret one is the corresponding password.

* New mailbox formats

Three new append-only mailbox formats are introduced. The URL syntax of
each of them is the same as that of the corresponding mailer.

** smtp

Send message using the `smtp' mailer. It is equivalent to
`remote+smtp', introduced in previous version.

** sendmail.

Send message using the `sendmail' mailer. It is equivalent to
`remote+sendmail', introduced in previous version.

** prog

Send message using the `prog' mailer. It is equivalent to
`remote+prog', introduced in previous version.

* Deprecated mailbox formats.

The `remote+sendmail', `remote+prog' and `remote+smtp' mailbox formats
are deprecated in favor of `sendmail', `prog' and `smtp',
correspondingly.  

** New functions

- mu_mailbox_get_uidls

** Removed functions

- mu_sieve_get_ticket
- mu_sieve_set_ticket

** Changed functions

*** mu_message_save_to_mailbox: removed `ticket' argument.

The new prototype is:

int mu_message_save_to_mailbox (mu_message_t msg,
                                mu_debug_t debug,
				const char *toname,
				int perms);

*** mu_attribute_to_string

This function now returns a string consisting of flag letters only, without
"Status:" prefix or final newline.


Version 2.0:

* New configuration file format.

See documentation, chapter 2.2, `Mailutils Configuration File', for a
detailed description.

* Programs

** Debugging and online help

Each Mailutils utility understands two additional command line
options:

 --debug-level=LEVEL    Set Mailutils debugging level.
 --debug-line-info      Show source info with debugging messages.

(see also `** Global debugging and verbosity settings.', below)

The programs using configuration file facility also understand the
--config-help command line option.  This option prints on the standard
output the detailed description of configuration file statements that
affect the given program.

** URL parameters.

Additional mailbox URL parameters `type', `user' and `param' can
appear in any local URLs.

** MAIL and FOLDER environment variables.

These variables are consulted only if mail-spool directory is not
explicitely set either in the configuration files or in the command
line. This is different from the previous versions.

** New utility `maidag'

Maidag is a MAIl Delivery AGent. It is a general-purpose MDA able to
run in both traditional and LMTP mode and to deliver mails to various
mailbox formats.  These formats, among others, include remote+smtp and
remote+sendmail (see `New mailbox types.', below), which are
equivalent to forwarding a message over SMTP.  Thus, maidag supercedes
both `mail.local' and `mail.remote' (which are still included for
backward compatibility).  Maidag is also able to process incoming 
messages using Sieve or Scheme scripts and, based on results of this
processing, to take a decision on whether to actually deliver and
where to deliver them.

** Comsat

The `comsat' utility is able to notify about messages delivered to
a mailbox of any `local' type, i.e.: UNIX mailbox, MH and Maildir.
This is implemented using quick access mode.  See `Quick access to a
message', below.

The communication protocol has been modified to make this possible.
The traditional comsat protocol is supported as well.

** Sieve

*** New Sieve action `pipe'

Syntax: pipe [:envelope] <command line: string> 

This action executes the given <command line> and pipes the message to
its standard input. If the :envelope tag is given, the envelope of the
message is piped as well.

*** Fileinto :permissions

The `fileinto' action takes a tag :permissions that allows to set
permissions on the mailbox, in case it is created.  Its argument is a
string, similar to that used in chmod(1):

	[go](+|=)[rw]

For example:

	fileinto :permissions "g=rw,o=r" "/shared/mailbox"

** Client SMTP STARTTLS support

** Support for new protocols: POPS (pops://) and IMAPS (imaps://),

** LDAP support (authentication and authorization).

** Support for TCP wrappers.

The support for TCP wrappers is added to the daemon programs (imap4d,
pop3d, maidag). The support is controlled at compile time by the
--with-tcpwrappers command line options to configure. By default, it
is enabled if libwrap presence is detected. A set of configuration
file statements are provided for fine tuning TCP wrappers at run-time.

** pop3d and imap4d ports.

Pop3d and imap4d can be configured to listen on several different
IP addresses/ports (or even local sockets) simultaneously.

** pop3d: Fixed APOP handling.

** Imap4d supports UNSELECT extension.

** Imap4d supports ID extension.

** imap4d supports PREAUTH mode.

Three mechanisms are provided for authentifying the connection in
PREAUTH mode:

 1. stdio - PREAUTH mode is enabled automatically if imap4d is started
    from command line in interactive mode (-i command line
    option). The current login name is used as the user name.

 2. ident - The remote machine is asked about the requester identity
    using the identification protocol (RFC 1413). Both plaintext and
    DES encrypted replies are understood.

 3. prog - Imap4d invokes an external program to authenticate the
    connection. The command line is obtained from the supplied string,
    by expandind the following variables:

      1) ${client_address} - Remote IP address in dotted-quad notation;
      2) ${client_port}    - Remote port number;
      3) ${server_address} - Local IP address;
      4) ${server_port}    - Local port number.

    If the connection is authenticated, the program should print the
    user name, followed by a newline character, on its standard
    output and exit with code 0.

    Otherwise, it shoud exit with a non-zero exit code.
    
* Libraries

** Support for ESMTP SIZE extension (RFC 1870).

** Diagnostic and debugging functions essentially rewritten.

A set of debugging macros, MU_DEBUG0 through MU_DEBUG11, is provided.
New functions mu_debug_printf and mu_debug_vprintf allow for flexible
formatting of debugging messages. The mu_debug_t object features
built-in line bufferring.

The new function mu_debug_check_level(d,l) returns true if the logging
level currently set for debugging object `d' matches that given by
`l'.

New diagnostics functions are available, among them:

  void mu_diag_vprintf (int level, const char *fmt, va_list ap);
  void mu_diag_printf (int level, const char *fmt, ...);
  void mu_diag_voutput (int level, const char *fmt, va_list ap);
  void mu_diag_output (int level, const char *fmt, ...);

A new header file, mailutils/diag.h, provides declarations for these
and other related functions.
  
See documentation (FIXME: Chapter?) for more information.

The functions mu_error and mu_verror are shortcuts for
mu_diag_output (MU_DIAG_ERROR, ...)  and mu_diag_voutput (MU_DIAG_ERROR, ...),
correspondingly.

The function mu_error_set_print is deprecated as well as the
mu_error_pfn_t type. They are, however, still supported. The following
approach is recommended to use instead of mu_error_set_print:

      mu_diag_get_debug (&debug);
      mu_debug_set_print (debug, new_printer, NULL);

** Header iteration

New function `mu_header_get_iterator' returns an iterator for this
header object. Thus, the following code loops over all headers:

      mu_iterator_t itr;
      mu_header_get_iterator (header, &itr);
      for (mu_iterator_first (itr); !mu_iterator_is_done (itr);
	   mu_iterator_next (itr))
	{
	  const char *hdr, *val;
	  mu_iterator_current_kv (itr,
				  (const void**)&hdr,
				  (void**)&val));
	  /* Do something with hdr and val */			  
	}
      mu_iterator_destroy (&itr);

** Global debugging and verbosity settings.

These settings provide default values for mu_debug_t objects created
by various library objects. The following functions are provided for
dealing with global debugging level:

   unsigned mu_global_debug_level (const char *object_name);
   int mu_global_debug_set_level (const char *object_name, unsigned level);
   int mu_global_debug_clear_level (const char *object_name);

** New function mu_mailbox_sync

It supercedes mu_mailbox_save_attributes, which is now considered
deprecated.

** Observable event handling

Each event type is associated with an event-specific data
pointer. This pointer is passed to event handling functions along with
an opaque function-specific data pointer. This affects the following
functions:

  mu_observer_set_action
  mu_observer_set_action_data (New function)
  mu_observable_notify

New type of event, MU_EVT_MESSAGE_APPEND, is signalled whenever a new
message is appended to the mailbox.

** Quick access to a message

A set of functions are provided for so-called `quick access' to mail
messages.

Quick access is used when an appli