====================
- Add support for Python 3.3.
- Delete event fossils (interfaces ``zope.sendmail.interfaces.IMailSent`` and
``zope.sendmail.interfaces.IMailError``. plus the ``zope.sendmail.events``
module and associated tests). These events were never emitted, and couldn't
have been used safely even if they had been, due to two-phase commit.
https://bugs.launchpad.net/zope3/+bug/177739
- Replace deprecated ``zope.interface.classProvides`` usage with equivalent
``zope.interface.provider`` decorator.
- Replace deprecated ``zope.interface.implements`` usage with equivalent
``zope.interface.implementer`` decorator.
- Drop support for Python 2.4 and 2.5.
- Add a vote method to Mailer implementations to allow them to abort a
transaction if it is known to be unsafe.
- Prevent fatal errors in mail delivery causing potential database corruption.
- Add not declared, but needed test dependency on `zope.component [test]`.
- Add handling for unicode usernames and passwords, encoding them to UTF-8.
Fix for https://bugs.launchpad.net/zope.sendmail/+bug/597143
- Give the background queue processor thread a name.
- Document the ini file keys for ``zope-sendmail --config`` in the help
message printed by ``zope-sendmail --help``. Also rewrote the command-line
parsing to use optparse (not argparse, since Python 2.6 is still supported).