Zope.sendmail

==================

====================

- If the SMTP server rejects a message (for example, when the sender or
recipient address is malformed), that email stays in the queue forever
(https://bugs.launchpad.net/zope3/+bug/157104).

====================

- Add README.txt
- Can now talk to servers that don't implement EHLO
- Fix bug that caused files with very long names to be created
- Fix for https://bugs.launchpad.net/zope3/+bug/157104: move aside mail that's
causing 5xx server responses.

====================

- Clean up ``does_esmtp`` in faux SMTP connection classes provided by the
tests.
- If the ``QueueProcessorThread`` is asked to stop while sending messages, do
so after sending the current message; previously if there were many, many
messages to send, the thread could stick around for quite a while.

====================

- ``QueueProcessorThread`` now accepts an optional parameter *interval* for
defining how often to process the mail queue (default is 3 seconds)

- Several ``QueueProcessorThreads`` (either in the same process, or multiple
processes) can now deliver messages from a single maildir without duplicates
being sent.

==================

- Bugfix: Don't keep open files around for every email message
to be sent on transaction commit. People who try to send many emails
in a single transaction now will not run out of file descriptors.