更新内容如下：
Configuration

• BREAKING CHANGE: The nntp runner is no longer started by default. If you
  have lists gating to/from usnet you need to add start: yes in the
  [runner.nntp] section in mailman.cfg.

Bugs fixed

• The mailman members command will now fall back to the member's user
  record display_name if the address record has none. (Closes #1107)

• The user_name_or_email substitution in regular header/footer templates now
  works (Closes #1108)

• The output from the mailman lists command no longer has trailing blanks

  and the command with the -d option doesn't fail with very long list ids.
  (Closes #1117 and #1118)

• The text of the AlreadySubscribedError is now translatable. (Closes #1121)

• The mailman import21 command adjust spaces in subject_prefix for
  Mailman 2.1 compatibility. (Closes #1135)

• An exception in the lmtp runner is caught and a retryable status returned.
  (Closes #1148)

• Catch more generic requests exceptions on downloading suffix list
  to avoid shunting messages. (Closes #1140)

• Reordered retrievals in the Task runner to avoid premature deletions due to
  a race condition. (Closes #1151)

• The nttplib slated to be removed in Python 3.13. Getting from PyPI.
  (Closes #1144)

• The web URL replacements now work in all templates. (Closes #1142)

• Emergency moderation is now applied following mail loop detection, banned
  address detection and header matching so those actions are applied before
  an emergency hold. (Closes #173)

• The performance of mailman findmember has been improved. (Closes #1095)

• Moderation reasons in admin notices of held messages are now always in the
  list's preferred language. (Closes #1159)

• The mailman import21 command drops invalid regexps from the imported
  ban_list. (Closes #1166)

• The default setting for bounce_matching_headers is shortened.
  (Closes #1172)

• The --force option for mailman start will now remove a stale lock if
  the pid that set it exists but is not a Mailman process. (Closes #1174)

New Features

• One can now add entries like @list@example.com to the
  accept_these_nonmembers attribute of a list to accept nonmember posts
  from members of another list. (Closes #794)
• REST API now allows forwarding the held message to a new address when handling
  the message. (Fixes #174)
• Add the ability to set web URLs by setting domain's base_url parameter
  which allows using parameters like $held_message_url in
  the templates. (See #981)
• The mailman create command now has a --style-name NAME option.
  (Closes #1136)
• The task runner will now delete message files that have no entry in the
  message store. (Closes #1145)
• Set process title if setproctitle module is available. (Closes #1134)
• Strip whitespaces from Message-ID header value in log not to separate
  into multiple lines (Closes #1139)
• The lifetime of saved DSNs in the message store is now configurable with a
  default of 1 day. (Closes #1145)
• Task runner now uses the configured dsn_lifetime when deleting bounce events.
• Setting digest_size_threshold to zero now means unlimited, i.e., a
  digest will never be sent based on size. (Closes #1158)
• There is a new mailman admins command to add/delete owners or moderators
  of a list. (Closes #1160)

Other

• The Mailman master process that starts the runners will now pass a
  number of environment variables to the runner processes that alter
  the behavior of the Python interpreter. See section ENVIRONMENT
  VARIABLES in man python.

Packaging

• Migrate to using the new standard pyproject.toml for Python packaging
  instead of setup.py. This also moves from setuptools to pdm to be used
  as the build backend.