Package: zope.sendmail
zope.sendmailzope.sendmail is a package for email sending from Zope 3 applications.
Email sending from Zope 3 applications works as follows:A Zope 3 application locates a mail delivery utility
(IMailDelivery) and feeds a message to it. It gets back a unique
message ID so it can keep track of the message by subscribing toIMailEventevents.The utility registers with the transaction system to make sure the
message is only sent when the transaction commits successfully.
(Among other things this avoids duplicate messages onConflictErrors.)If the delivery utility is aIQueuedMailDelivery, it puts the
message into a queue (a Maildir mailbox in the file system). A
separate process or thread (IMailQueueProcessor) watches the queue
and delivers messages asynchronously. Since the queue is located in
the file system, it survives Zope restarts or crashes and the mail is
not lost.  The queue processor can implement batching to keep the
server load low.If the delivery utility is aIDirectMailDelivery, it delivers
messages synchronously during the transaction commit.  This is not a
very good idea, as it makes the user wait.  Note that transaction
commits must not fail, but that is not a problem, because mail
delivery problems dispatch an event instead of raising an exception.However, there is a problem – sending events causes unknown code to
be executed during the transaction commit phase.  There should be a
way to start a new transaction for event processing after this one is
commited.AnIMailQueueProcessororIDirectMailDeliveryactually
delivers the messages by using a mailer (IMailer) component that
encapsulates the delivery process.  There currently is only one
mailer:ISMTPMailersends all messages to a relay host using SMTP.Documentation is hosted athttps://zopesendmail.readthedocs.io/Changes6.1 (2024-02-07)Fix SMTP protocol interoperability by avoiding hardcoded line endings.
(seehttps://www.rfc-editor.org/rfc/rfc2821#section-2.3.7)Add preliminary support for Python 3.13 as of 3.13a3.Add support for Python 3.12.6.0 (2023-08-22)Drop support for Python 2.7, 3.5, 3.6.Add support for Python 3.11.5.3 (2022-10-06)Add support for Python 3.10.Do not try to send queued emails to an empty address
(#45).5.2 (2021-01-18)Add minimal savepoint support, so we do not fail if any code tries to create a savepoint.
(#35).Fix TypeError: ‘error’ object is not subscriptable during error handling on
Windows (#33).Add support for Python 3.9.5.1 (2020-07-31)Usepywin32again, not any longer the meanwhile outdated fork namedpypiwin32.
Add some information for installation with buildout.
(#30)Supportbytesmessages; consistently convert messages
using a “text” type (i.e.strfor Python 3,unicodefor Python 2)
intobytesvia utf-8 encoding.
Prerequisite to fixProducts.MailHost#30.5.0 (2019-04-03)Drop support for Python 3.4.Add support for Python 3.8a3.Fix text/bytes issue in MailDir for Python 3.
(#24)4.2.1 (2019-02-07)Fix SMTP authentication on Python 3. Seeissue 16.4.2 (2018-10-10)Add support for Python 3.7.4.1.0 (2017-09-02)Host documentation athttps://zopesendmail.readthedocs.io/Make the data manager sort key a string, this fixes Python 3 where
strings and integers are not sortable. This would happen when using
other data managers with string sort keys.Add support for Python 3.5 and 3.6.Drop support for Python 2.6 and 3.3.Declare explicit dependency onpywin32on Windows.Replace hard-coded constants with equivalents from the standarderrnomodule.Fix SSL support on Python 3. Seeissue 9.Reach 100% test coverage and maintain it via tox.ini and Travis CI.Replaced deprecated dependency onoptparsewith equivalentargparse. The help messages have changed and errors are
generally more clear. Specifying a--configpath that doesn’t
exist is now an error instead of being silently ignored.Fix SMTPMailer sending more than one message. It now reconnects to
the SMTP server as needed. Previously it could only send one message
since it closed the connection after each send. This also makes the
SMTPMailer thread safe. Seeissue 1.4.0.1 (2014-12-29)Add support for PyPy3.4.0.0 (2014-12-20)Add support for testing on Travis-CI against supported Python verisons.Drop use ofzope.testrunnerfor testing.Drop dependency onsix.Replace doctests with equivalent unittests.4.0.0a2 (2013-02-26)Fix license Trove classifier.4.0.0a1 (2013-02-25)Add support for Python 3.3.Delete event fossils (interfaceszope.sendmail.interfaces.IMailSentandzope.sendmail.interfaces.IMailError. plus thezope.sendmail.eventsmodule 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/177739Replace deprecatedzope.interface.classProvidesusage with equivalentzope.interface.providerdecorator.Replace deprecatedzope.interface.implementsusage with equivalentzope.interface.implementerdecorator.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 onzope.component [test].Add handling for unicode usernames and passwords, encoding them to UTF-8.
Fix forhttps://bugs.launchpad.net/zope.sendmail/+bug/597143Give the background queue processor thread a name.Document the ini file keys forzope-sendmail--configin the help
message printed byzope-sendmail--help.  Also rewrote the command-line
parsing to use optparse (not argparse, since Python 2.6 is still supported).3.7.5 (2012-05-23)Ensure that the ‘queuedDelivery’ directive has the same discriminator
as the ‘directDelivery’ directive (they are mutually incompatible).https://bugs.launchpad.net/zope.sendmail/+bug/191143Avoid requeuing messages after an SMTP “recipients refused” error.https://bugs.launchpad.net/zope.sendmail/+bug/10032883.7.4 (2010-10-01)Handle unicode usernames and passwords, encoding them to UTF-8. Fix forhttps://bugs.launchpad.net/zope.sendmail/+bug/5971433.7.3 (2010-09-25)Add not declared, but needed test dependency onzope.component [test].3.7.2 (2010-04-30)Remove no longer required testing dependency on zope.testing.Maildir storage for queue can now handle unicode passed in for message or
to/from addresses (change backported from repoze.sendmail).Tests use stdlib doctest instead of zope.testing.doctest.3.7.1 (2010-01-13)Backward compatibility import of zope.sendmail.queue.QueueProcessorThread in
zope.sendmail.delivery.3.7.0 (2010-01-12)Remove dependency onzope.security: the security support is optional,
and only available if thezope.securitypackage is available. This change
is similar to the optional security support introduced inzope.component3.8.0, and in fact it uses the same helpers.Sort by modification time the messages in zope.sendmail.maildir so earlier
messages are sent before later messages during queue processing.Add the new parameterprocessorThreadto the queuedDelivery ZCML
directive: if False, the QueueProcessorThread is not started and thus an
independent process must process the queue; it defaults to True for b/c.Provide a console scriptzope-sendmailwhich can be used to process the
delivery queue in case processorThread is False. The console script can
either process the messages in the queue once, or run in “daemon” mode.3.6.1 (2009-11-16)Depend onzope.component>= 3.8.0, which supports the new semantic of
zope.component.zcml.proxify needed by zope.sendmail.zcml.3.6.0 (2009-09-14)Use simple vocabulary factory function instead of customUtilityTermandUtilityVocabularyclasses, copied fromzope.app.componentin
the previous release.Depend on thetransactionpackage instead ofZODB3.Remove zcml slugs and zpkg-related files.Work around problem when used with Python >=2.5.1.  Seehttps://bugs.edge.launchpad.net/zope.sendmail/+bug/413335.3.5.1 (2009-01-26)Copyover the UtilityTerm and UtilityVocabulary implementation from
zope.app.component to avoid a dependency.Work around a problem when smtp quit fails, the mail was considered not
delivered where just the quit failed.3.5.0 (2008-07-05)final release (identical with 3.5.0b2)3.5.0b2 (2007-12-19)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).3.5.0b1 (2007-11-08)Add README.txtCan now talk to servers that don’t implement EHLOFix bug that caused files with very long names to be createdFix forhttps://bugs.launchpad.net/zope3/+bug/157104: move aside mail that’s
causing 5xx server responses.3.5.0a2 (2007-10-23)Clean updoes_esmtpin faux SMTP connection classes provided by the
tests.If theQueueProcessorThreadis 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.3.5.0a1 (2007-10-23)QueueProcessorThreadnow accepts an optional parameterintervalfor
defining how often to process the mail queue (default is 3 seconds)SeveralQueueProcessorThreads(either in the same process, or multiple
processes) can now deliver messages from a single maildir without duplicates
being sent.3.4.0 (2007-08-20)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.3.4.0a1 (2007-04-22)Initial release as a separate project, corresponds tozope.sendmailfrom Zope 3.4.0a1.