Dependencies

  - There is a new dependency associated with the new Privacy options ->
    Sender filters -> dmarc_moderation_action feature discussed below.
    This requires that the dnspython <http://www.dnspython.org/> package
    be available in Python.  This package can be downloaded from the above
    site or from the CheeseShop <https://pypi.python.org/pypi/dnspython/>
    or installed with pip.

New Features

  - The from_is_list feature introduced in 2.1.16 is now unconditionally
    available to list owners.  There is also, a new Privacy options ->
    Sender filters -> dmarc_moderation_action feature which applies to list
    messages where the From: address is in a domain which publishes a DMARC
    policy of reject or possibly quarantine.  This is a list setting with
    values of Accept, Wrap Message, Munge From, Reject or Discard. There is
    a new DEFAULT_DMARC_MODERATION_ACTION configuration setting to set the
    default for this, and the list admin UI is not able to set an action
    which is 'less' than the default.  The prior ALLOW_FROM_IS_LIST setting
    has been removed and is effectively always Yes. There is a new
    dmarc_quarantine_moderation_action list setting with default set by a
    new DEFAULT_DMARC_QUARANTINE_MODERATION_ACTION configuration setting
    which in turn defaults to Yes.  The list setting can be set to No to
    exclude domains with DMARC policy of quarantine from
    dmarc_moderation_action.

    dmarc_moderation_action and from_is_list interact in the following way.
    If the message is From: a domain to which dmarc_moderation_action applies
    and if dmarc_moderation_action is other than Accept,
    dmarc_moderation_action applies to that message.  Otherwise the
    from_is_list action applies.

    Also associated with dmarc_moderation_action are configuration settings
    DMARC_RESOLVER_TIMEOUT and DMARC_RESOLVER_LIFETIME. These are described
    in more detail in Defaults.py.  There are also new vette log entries
    written when dmarc_moderation_action is found to apply to a post.

i18n

  - Added missing <mm-digest-question-start> tag to French listinfo template.
    (LP: #1275964)

Bug Fixes and other patches

  - Removed HTML tags from the title of a couple of rmlist.py pages because
    browsers don't render tags in the title.  (LP: #265848)

  - Most Mailman generated notices to list owners and moderators are now
    sent as Precedence: list instead of bulk.  (LP: #1313146)

  - The Reply-To: munging options weren't honored if there was no
    from_is_list action.  (LP: #1313010)

  - Changed from_is_list actions to insert the list address in Cc: if the
    list is fully personalized.  Otherwise, the list address is only in
    From: and Reply-To: overrides it.  (LP: #1312970)

  - Fixed the Munge From action to only Munge the From: and/or Reply-To: in
    the outgoing message and not in archives, digests and messages sent via
    the usenet gateway.  (LP: #1311431)

  - Fixed a long standing issue in which a notice sent to a user whose
    language is other than that of the list can cause subsequent things
    which should be in the list's language to be in the user's language
    instead.  (LP: #1308655)

  - Fixed the admin Membership List so a search string if any is not lost
    when visiting subsequent fragments of a chunked list.  (LP: #1307454)

  - For from_is_list feature, use email address from original From: if
    original From: has no display name and strip domain part from resultant
    names that look like email addresses.  (LP: #1304511)

  - Added the list name to the vette log "held message approved" entry.
    (LP: 1295875)

  - Added the CGI module name to various "No such list" error log entries.
    (LP: 1295875)

  - Modified contrib/mmdsr to report module name if present in "No such list
    error log entries.

  - Fixed a NameError exception in cron/nightly_gzip when it tries to print
    the usage message.  (LP: #1291038)

  - Fixed a bug in ListAdmin._handlepost that would crash when trying to
    preserve a held message for the site admin if HOLD_MESSAGES_AS_PICKLES
    is False.  (LP: #1282365)

  - The from_is_list header munging feature introduced in Mailman 2.1.16 is
    no longer erroneously applied to Mailman generated notices.
    (LP: #1279667)

  - Changed the message from the confirm CGI to not indicate approval is
    required for an acceptance of an invitation.  (LP: #1277744)

  - Fixed POSTFIX_STYLE_VIRTUAL_DOMAINS to be case-insensitiive.
    (LP: #1267003)

  - Added recognition for another simple warning to bounce processing.
    (LP: #1263247)

  - Fixed a few failing tests in tests/test_handlers.py.  (LP: #1262950)

  - Fixed bin/arch to not create scrubbed attachments for messages skipped
    when processing the --start= option.  (LP: #1260883)

  - Fixed email address validation to do a bit better in obscure cases.
    (LP: #1258703)

  - Fixed a bug which caused some authentication cookies to expire too soon
    if AUTHENTICATION_COOKIE_LIFETIME is non-zero.  (LP: #1257112)
 
  - Fixed a possible TypeError in bin/sync_members introduced in 2.1.17.
    (LP: #1243343)

Miscellaneous

  - Added to the contrib directory, a script from Alain Williams to count
    posts in a list's archive.

New Features

  - Handling of posts gated from usenet to a list via the Mail <-> News
    gateway is changed.  Formerly, no list membership, moderation or
    *_these_nonmembers checks were done.  Now, if the sender of the usenet
    post is a moderated member or a nonmember matching a *_these_nonmembers
    filter, those checks will be done and actions applied.  Nonmember posts
    from senders not matching a *_these_nonmembers filter are still accepted
    as before.  (LP: #1252575)

  - There is a new mm_cfg.py setting ANONYMOUS_LIST_KEEP_HEADERS.  Since it
    is not possible to know which non-standard headers in a message might
    reveal sender information, we now remove all headers from incoming posts
    to anonymous lists except those which match regular expressions in this
    list. The default setting keeps non X- headers except those known to
    reveal sender information, Mailman added X- headers and x-Spam- headers.
    See the description in Defaults.py for more information.  (LP: #1246039)

i18n

  - The Japanese message catalog has been updated by SATOH Fumiyasu.
    (LP: #1248855)

Bug Fixes and other patches

  - Added a reopen command to the sample init.d script in misc/mailman.in.
    (LP: #1251917)

  - Fixed a misspelling in Tagger.py causing an "unexpected keyword argument
    'Delete'" exception.  (LP: #1251495)

  - Fixed contrib/qmail-to-mailman.py to work with a user other than
    'mailman' and to recognize more listname-* addresses.  (LP: #412293)

  - Fixed a possible UnicodeDecodeError in bin/sync_members.  (LP: #1243343)

  - Fixed Makefile to not include $DESTDIR in paths compiled into .pyc
    files for traceback purposes.  (LP: #1241770)

New Features

  - There is a new list attribute from_is_list to either rewrite the From:
    header of posts replacing the posters address with that of the list or
    wrap the message in an outer message From: the list for compatability
    with DMARC and or ADSP.  There is a new mm_cfg.py setting
    DEFAULT_FROM_IS_LIST to control the default for new lists, and the
    existing REMOVE_DKIM_HEADERS setting has been extended to allow removing
    those headers only for certain from_is_list lists.  This feature must
    be enabled by setting ALLOW_FROM_IS_LIST to Yes in mm_cfg.py.  See the 
    description of these settings in Defaults.py for more detail.  This
    feature is experimental in 2.1.16, and it is subject to change or to
    become just one of the two methods in a subsequent release. People 
    interested in this feature are encouraged to try it and report their
    experiences to the mailman-users@python.org list.

  - There is a new DISPLAY_HELD_SUMMARY_SORT_BUTTONS setting which if set
    in mm_cfg.py will display a set of radio buttons in the admindb held
    message summary to select how the held messages are sorted and grouped
    for display. The exact setting determines the default grouping and
    sorting.  See the description in Defaults.py for details.

  - Setting digest_size_threshhold to zero now means no digests will be
    sent based on size instead of a digest being sent with every post.
    (LP: #558274)

  - There is a new mm_cfg.py setting SUBSCRIBE_FORM_SECRET which will put
    a dynamically generated, hidden hash in the listinfo subscribe form and
    check it upon submission.  Setting this will prevent automated processes
    (bots) from successfully POSTing web subscribes without first retrieving
    and parsing the form from the listinfo page.  The form must also be
    submitted no later than FORM_LIFETIME nor no earlier than
    SUBSCRIBE_FORM_MIN_TIME after retrieval.  Note that enabling this will
    break any static subscribe forms on your site.  See the description in
    Defaults.py for more info.  (LP: #1082746)

  - add_members now has an option to add members with mail delivery disabled
    by admin.  (LP: #1070574)

  - IncomingRunner now logs rejected messages to the vette log.
    (LP: #1068837)

  - The name of the mailmanctl master lock file is now congigurable via the
    mm_cfg.py setting MASTER_LOCK_FILE.  (LP: #1082308)

  - list_lists now has an option to list only lists with public archives.
    (LP: #1082711)

Contributed programs

  - A new import_majordomo_into_mailman.pl script has been contributed by
    Geoff Mayes.  (LP: #1129742)

  - A new "sitemap" bash script has been contributed by Tomasz Chmielewski
    <mangoo@wpkg.org> to generate a sitemap.xml file of an installation's
    public archives for submission to search engines.

i18n

  - The Danish translation has been updated thanks to Tom Christensen.

  - Fixed a string in the Czech message catalog.  (LP: #1234567)

  - A Farsi (Persian) translation has been added thanks to Javad Hoseini and
    Mahyar Moghimi.

  - Fixed several misspelled or garbled string replacements in the Spanish
    message catalog.  (LP: #1160138)

  - pt_BR message catalog has two new and an updated message per Hugo Koji
    Kobayashi.  (LP: #1138578)

  - German message catalog has been updated per Ralf Hildebrandt.

  - Corrected typo in templates/it/private.html.

Bug Fixes and other patches

  - Fixed a crash in SpamDetect.py which caused messages with unparseable
    RFC 2047 encoded headers to be shunted.  (LP: #1235101)

  - Fixed cron/disabled to send a fresh cookie when notifying disabled
    members.  (LP: #1203200)

  - Added "message_id" to the interpolation dictionary for the Article.html
    template.  (LP: #725498)

  - Changed the admin GUI to report only the bad entries in a list of email
    addresses if any are bad.  (LP: #558253)

  - Added logging for template errors in HyperArch.py.  (LP: #558254)

  - Added more explanation to the bad owner address message from
    bin/newlist.  (LP: #1200763)

  - Fixed a bug causing the admin web interface to fail CSRF checking if
    the list name contains a '+' character.  (LP: #1190802)

  - Fixed bin/mailmanctl -s to not remove the master lock if it can't be
    determined to be truly stale.  (LP: #1189558)

  - It is no longer possible to add 'invalid' addresses to the ban_list
    and the *_these_nonmembers filters from the check boxes on the admindb
    interface.  (LP: #1187201)

  - Backported recognition for mail.ru DSNs and minor bug fixes from
    lp:flufl.bounce.  (LP: #1074592, LP: #1079249 and #1079254)

  - Defended against buggy web servers that don't include an empty
    QUERY_STRING in the CGI environment.  (LP: #1160647)

  - The Switchboard.finish() method now logs the text of the exception when
    it fails to unlink/preserve a .bak file.  (LP: #1165589)

  - The pending (un)subscriptions waiting approval are now sorted by email
    address in the admindb interface as intended.  (LP: #1164160)

  - The subscribe log entry for a bin/add_members subscribe now identifies
    bin/add_members as the source.  (LP: #1161642)

  - Fixed a bug where the Subject: of the user notification of a
    bin/remove_members unsubscribe was not in the user's language.
    (LP: #1161445)

  - Fixed a bug where BounceRunner could create and leave behind zero length
    bounce-events files.  (LP: #1161610)

  - Added recognition for another Yahoo bounce format.  (LP: #1157961)

  - Changed configure's method for getting Python's include directory from
    distutils.sysconfig.get_config_var('CONFINCLUDEPY') to
    distutils.sysconfig.get_python_inc().  (LP: #1098162)

  - Added an Auto-Generated: header to password reminders.  (LP: #558240)

  - Fixed a bug where non-ascii characters in the real name in a subscription
    request could throw a UnicodeEncodeError upon subscription approval and
    perhaps in other situations too.  (LP: #1047100)

  - The query fragments send_unsub_notifications_to_list_owner and
    send_unsub_ack_to_this_batch will now assume default values if not set
    in mass unsubscribe URLs.  (LP: #1032378)

  - Replaced utf-8 encoded characters in newly added German templates with
    HTML entities. (LP: #1018208)

Security

  - Strengthened the validation of email addresses.

  - An XSS vulnerability, CVE-2011-0707, has been fixed.

  - The web admin interface has been hardened against CSRF attacks by adding
    a hidden, encrypted token with a time stamp to form submissions and not
    accepting authentication by cookie if the token is missing, invalid or
    older than the new mm_cfg.py setting FORM_LIFETIME which defaults to one
    hour.  Posthumous thanks go to Tokio Kikuchi for this implementation
    which is only one of his many contributions to Mailman prior to his
    death from cancer on 14 January 2012.

New Features

  - Added a password reminder button to the private archive login page.
    Backported from the 2.2 branch.

  - There is a new list attribute regular_exclude_ignore set from mm_cfg.py
    DEFAULT_REGULAR_EXCLUDE_IGNORE.  This defaults to True even though the
    prior behavior is equivalent to False.  A True setting will ignore an
    exclude list if the poster is not a member of that list.  The False
    setting can result in list members not receiving posts if the nonmember
    post is not accepted by the exclude list.  Backported from 2.2 branch.

  - Eliminated the list cache from the qrunners.  Indirect self-references
    caused lists to never be dropped from the cache which in turn caused
    the qrunners to grow very large in installations with many lists or
    multiple large lists.  Bug #862683.

  - The user options 'list my other subscriptions' page now indicates for
    each list if the subscription is 'nomail' or 'digest'.  Bug #793669.

  - A new list poster password has been implemented.  This password may only
    be used in Approved: or X-Approved: headers for pre-approving posts.
    Using this password for that purpose precludes compromise of a more
    valuable password sent in plain text email.  Bug #770581.

  - A new mm_cfg.py setting AUTHENTICATION_COOKIE_LIFETIME has been added.
    If this is set to a non-zero value, web authentication cookies will
    expire that many seconds following their last use.  Its default value is
    zero to preserve current behavior.

  - A new mm_cfg.py setting RESPONSE_INCLUDE_LEVEL has been added to control
    how much of the original message is included in automatic responses to
    email commands.  The default is 2 to preserve the prior behavior of
    including the full message.  Setting this to 1 in mm_cfg.py will include
    only the original headers, and 0 will include none of the original.  It
    is recommended to set this to 0 in mm_cfg.py to minimize the effects of
    backscatter.  Bug #265835.

  - A new mm_cfg.py setting DEFAULT_RESPOND_TO_POST_REQUESTS has been added
    to control the default for respond_to_post_requests for new lists.  It is
    set to Yes for backwards compatibility, but it is recommended that
    serious consideration be given to setting it to No.  Bug #266051.

  - A new mm_cfg.py setting DISCARD_MESSAGE_WITH_NO_COMMAND has been added to
    control whether a message to the -request address without any commands or
    a message to -confirm whose To: address doesn't match VERP_CONFIRM_REGEXP
    is responded to or just logged.  It defaults to Yes which is different
    from prior behavior.  Bug #410236.

  - Two new mm_cfg.py settings, BROKEN_BROWSER_WORKAROUND and
    BROKEN_BROWSER_REPLACEMENTS, have been added to control escaping of
    additional characters beyond the standard <, >, &, and " in the web UI.
    See the documentation of these settings in Defaults.py.  The default
    values for these settings result in no change from the prior release.
    Bug #774588.

i18n

  - Added some missing German templates from Egon Frerich.

  - Added Greek translation from Antonis Limperis.

  - A few errors in the Basque translation are fixed.  Bug #836861.

  - Fixed a misspelling in the German invite.txt template.  Bug #815444.

  - Fixed a missing format character in the Spanish translation.
    Bug #670988.

  - Thanks go to the following for updating translations for the changes in
    this release.
      Thijs Kinkhorst
      Stefan F�rster
      Fabian Wenk

Bug Fixes and other patches

  - Fixed a bug that could send an admin notice of a held subscription with
    the subject in the user's preferred language instead of the list's
    preferred language and possibly not properly RFC 2047 encoded.
    (LP: #998949)

  - Fixed a possible CPU bound loop in OutgoingRunner if the attempt to
    Connect to the SMTP server throws a socket.error.  (LP: #966531)

  - Fixed a potential crash in the web UI if a language is removed from the
    LC_DESCRIPTIONS dictionary.  (LP: #966565)

  - Added an Auto-Submitted: header to invitations and (un)subscription
    confirmation requests to reduce the possibility of an autoresponder
    confirming the request.  (LP: #265831)

  - Added javascript to the private.html and admlogin.html templates to
    focus the cursor on the entry field.  (LP: #266054)

  - Added CPPFLAGS and LDFLAGS to src/Makefile to support their use.
    (LP: #637652)

  - Stopped removing the trailing slash from the List-Archive: header URL.
    (LP: #964190)

  - A configured version of contrib/courier-to-mailman.py is now created in
    build/contrib/courier-to-mailman.py.  (LP: #999250)

  - Subscription disabled warnings are now sent without a Precedence:
    header.  Bug #808821.

  - Backported 2.2 branch fix for a problem in SpamDetect.py that could
    cause header_filter_rules to fail to match RFC 2047 encoded headers.

  - Fix for bug #629738 could cause a crash in the admindb details display
    if the decoded message body contained characters not in the character
    set of the list's preferred language.  Fixed.  Bug #910440.

  - Added recognition for another Qmail bounce format.

  - Fixed an erroneous seek in the Mailman.Mailbox.Mailbox.AppendMessage
    method that could cause a corrupt mailbox for files opened 'w+'.
    Bug #901957.

  - A held message with a null sender caused a crash in the admindb
    interface.  This is fixed by changing the sender to <missing>.
    Bug #897103.

  - Changed subject prefixing to allow for possible whitespace between an
    'Re' and the following colon when determining how to add the prefix.
    Bug #893290.

  - Fixed a problem where topics regexps would not match RFC 2047 encoded
    Keywords: and/or Subject: headers.  Bug #891676.

  - Fixed misleading response to an email approval of a held message.
    Bug #889968.

  - Added masthead.txt to the list of templates that can be edited via the
    web admin interface.  Bug #266805.

  - Changed the way digest_footer is added to the RFC 1153 (plain) format
    digest for RFC compliance.  Bug #887610.

  - Fixed cron/checkdbs to report unsubscriptions waiting approval.
    Bug #873821.

  - The fix for BUG #266220 (sf1181161) has been enhanced so that if there
    is a pathological HTML part such that the Approved: password text isn't
    found, but it is found after stripping out HTML tags, the post is
    rejected with an informative message.

  - A bug that would cause reset of any new_member_options bits other than
    the four displayed as checkboxes on the list admin General Options page
    whenever the page was updated or bin/config_list attempted to update
    new_member_options has been fixed.  Bug #865825.

  - A problem with the logic avoiding unnecessarily reloading a current list
    object from the config.pck arises if the list is updated by another
    process within the same second that it was last read/written.  That can
    cause the reading of latest version of the list to be skipped.  This has
    been fixed.  Bug #862675.

  - Fixed bin/export.py to accept case insensitive password schemes.
    Bug #833134.

  - Added Tokio Kikuchi's icons to the misc/ and installed icons/
    directories.  Bug #782474.

  - Fixed a problem which could result in raw, undecoded message bodies
    appearing in plain digests and archives.  Bug #787790.

  - Fixed a problem in admindb.py where the character set for the display of
    the message body excerpt was not correctly determined.  Bug #779751.

  - Prevented setting user passwords with leading/trailing whitespace.
    Bug #778088.

  - Mailman now sets the 'secure' flag in cookies set via https URLs.
    Bug #770377.

  - Added a logout link to the admindb interface and made both admin and
    admindb logout effective for a site admin cookie if allowed.
    Bug #769318.

  - Replaced the old Mailman logos and icon that install to Mailman's icons
    directory with the new ones.  If you copy these elsewhere on your
    server, please copy these new ones.

  - Changed bin/genaliases to only call the POSTFIX_*_CMD commands once when
    MTA = 'Postfix'.  Bug #266408.

  - Added a report of the affected members to the warnings issued when
    setting a list with digest members digestable=No and when setting a list
    with non-digest members nondigestable=no.  Bug #761232.

  - Fixed a problem where content filtering could remove the headers from
    an attached message/rfc822 part if the message in that part is
    multipart/alternative and collapse_alternatives is Yes.  Bug #757062.

  - Changed the subscribe CGI to strip leading and trailing whitespace from
    the supplied email address.  Bug #745432.

  - Changed the maximum number of arguments for the who command to be
    considered administrivia from 2 to 1 to help avoid false positives.
    Bug #739524.

  - Added the list name as 'display-name' in added Sender: headers to help
    mitigate Outlook et al 'on behalf of' displays.  Bug #736849.

  - Fixed a typo in the usage() definition cron/gate_news.  Bug #721015.

  - Fixed an uncaught KeyError when poster tries to cancel a post which was
    already handled.  Bug #266224.

  - Held message user notifications now come From: list-owner instead of
    list-bounces.  Bug #714424.

  - Issue an HTTP 404 status for private archive file not found.

  - @listname entries in *_these_nonmembers are no longer case sensitive.
    Bug #705715.

  - Changed bin/rmlist to also remove heldmsg files for the removed list and
    fixed a problem with removal of stale locks for the list.  Bug #700528.

  - Fixed a bug where content filtering could leave a multipart message or
    part with just one sub-part. These should be recast to just the sub-part.
    Bug #701558.

  - Fixed a bug that could erroneously handle posts from addresses in
    *_these_nonmembers and send held/rejected notices to bogus addresses when
    The From or other sender header is RFC 2047 encoded.  Bug #702516.

  - Updated contrib/mm-handler-2.1.10 to better handle lists with names that
    look like admin addresses.  Bug #697161.

  - Added bounce recognition for a bogus Dovecot MDN.  Bug #693134.

  - Fixed a problem where an emailed command in the Subject: header with a
    non-ascii l10n of an 'Re:' prefix is ignored.  Bug #685261.

  - Fixed a problem with approving a post by email when the body of the
    approval mail is base64 encoded.  Bug #677115.

  - Fixed the host name in the From: address of the owner notification from
    bin/add_members.  Bug #666181.

Security

  - Two potential XSS vulnerabilities have been identified and fixed.

New Features

  - A new feature for controlling the addition/replacement of the Sender:
    header in outgoing mail has been implemented.  This allows a list owner
    to set include_sender_header on the list's General Options page in the
    admin GUI.  The default for this setting is Yes which preserves the prior
    behavior of removing any pre-existing Sender: and setting it to the
    list's -bounces address.  Setting this to No stops Mailman from adding or
    modifying the Sender: at all.

    Additionally, there is a new Defaults.py/mm_cfg.py setting
    ALLOW_SENDER_OVERRIDES which defaults to Yes but which can be set to No
    to remove the include_sender_header setting from General Options, and
    thus preserve the prior behavior completely.

  - Bounce processing has been enhanced so that if a bounce is returned to a
    list from a non-member who is a member of a regular_include_list, the
    bounce will be processed as a bounce for the included list.

i18n

  - Fixed a missing format character in the German bin/mailmanctl docstring.

  - Updated Dutch translation from Jan Veuger.

  - Updated Japanese Translation from Tokio Kikuchi.

  - Updated Finnish translation from Joni T�yryl�.

  - Made a few corrections to some Polish templates.  Bug #566731.

  - Made a minor change to the Chinese (China) message catalog.  Bug #545772.

  - Changed a few DOCTYPE directives in templates for compliance.
    Bug #500952 and Bug #500955.

Bug Fixes and other patches

  - Made minor wording improvements and typo corrections in some messages.
    Bug #426979.

  - Fixed i18n._() to catch exceptions due to bad formats.  Bug #632660.

  - Fixed admindb interface to decode base64 and quoted-printable encoded
    message body excerpts for display.  Bug #629738.

  - Fixed web CGI tracebacks to properly report sys.path.  Bug #615114.

  - Changed the member options login page unsubscribe request to include the
    requesters IP address in the confirmation request.  Bug #610527.

  - Changed fix_url to lock the list if not locked.  Bug #610364.

  - Made a minor change to the English subscribeack.txt (welcome message)
    template to emphasize that a password is only required to unsubscribe
    *without confirmation*.

  - Fixed an issue in admindb that could result in a KeyError and "we hit a
    bug" response when a moderator acts on a post that had been handled by
    someone else after the first moderator had retrieved it.  Bug #598671.

  - Fixed a bug which would fail to show a list on the admin and listinfo
    overview pages if its web_page_url contained a :port.  Bug # 597741.

  - Fixed bin/genaliases to not throw TypeError when MTA = None.
    Bug #587657.

  - Provided the ability to specify in mm_cfg.py a local domain (e.g.
    'localhost') for the local addresses in the generated virtual-mailman
    when MTA = 'Postfix'.  See VIRTUAL_MAILMAN_LOCAL_DOMAIN in Defaults.py.
    Bug #328907.

  - Made a minor change to the removal of an Approved: pseudo-header from
    a text/html alternative to allow for an inserted '\xA0' before the
    password.

  - Fixed Content Filtering collapse_alternatives to work on deeply nested
    multipart/alternative parts.  Bug #576675.

  - We now accept/remove X-Approved: and X-Approve: headers in addition to
    Approved: and Approve: for pre-approving posts.  Bug #557750.

  - Reordered the 'cancel' and 'subscribe' buttons on the subscription
    confirmation web page so the default action upon 'enter' will be the
    subscribe button in browsers that pick the first button.  Bug #530654.

  - Fixed a bug in the admindb interface that could apply a moderator
    action to a message not displayed.  Bug #533468.

  - Added a traceback to the log message produced when processing the
    digest.mbox throws an exception.

  - Added a urlhost argument to the MailList.MailList.Create() method to
    allow bin/newlist and the the create CGI to pass urlhost so the host
    will be correct in the listinfo link on the emptyarchive page.
    Bug #529100.

  - Added the List-Post header to the default list of headers retained in
    messages in the MIME digest.  Bug #526143.

  - When daemonizing mailmanctl, we now ensure terminal files are closed.

  - Fixed a bug in pipermail archiving that caused fallback threading by
    subject to fail.  Bug #266572.

  - We now give an HTTP 401 status for authentication failures from admin,
    admindb, private, options and roster CGIs, and an HTTP 404 status from
    all the CGIs for an invalid list name.

  - Backported the listinfo template change from the 2.2 branch to fix
    Bug #514050.

  - Fixed a bug where going to an archives/private/list.mbox/list.mbox URL
    would result in a munged URL if authentication was required. Bug #266164.

  - Fixed a bug where check_perms would throw an OSError if an entry in
    Mailman's lists/ directory was not a directory.  Bug #265613.

  - Fixed a bug where a message with an Approved: header held by a handler
    that precedes Approve (SpamDetect by default) would not have the
    Approved: header removed if the held message was approved.  Bug #501739.