Products.MailHost 6.1

Usage

MailHost provides integration with the Zope transaction system and optional support for asynchronous mail delivery. Asynchronous mail delivery is implemented using a queue and a dedicated thread processing the queue. The thread is (re)-started automatically when sending an email. The thread can be started manually (in case of restart) by calling its manage_restartQueueThread?action=start method through HTTP. There is currently no possibility to start the thread at Zope startup time.

Supports TLS/SSL encryption (requires Python compiled with SSL support).

Configuration

To force MailHost to only queue mails without sending them, activate queuing in the ZMI and set the environment variable MAILHOST_QUEUE_ONLY=1. This could be helpful in a staging environment where mails should not be sent.

6.1 (2025-11-20)

• Switch to PEP 420 native namespace.

• Add support for Python 3.14.

• Drop support for Python 3.9.

6.0 (2025-01-31)

• Drop support for Python 3.7, 3.8.

• Add support for Python 3.13.

• Add support to implicit_tls flag. With this flag set, MailHost use TLS from the beginning of the connection, known as SMTPS and commonly used on TCP port 465. Requires zope.sendmail >= 6.2

5.2 (2024-02-08)

• Use SMTP compatible line separators in generated messages.

• Remove doc string from the MailHost sendTemplate method to prevent publishing.

5.1 (2024-02-07)

• Remove doc string from the MailHost send method to prevent publishing.

• Add support for Python 3.12.

5.0 (2023-02-01)

• Drop support for Python 2.7, 3.5, 3.6.

4.13 (2022-12-16)

• Fix insidious buildout configuration bug for tests against Zope 4.

• Add support for Python 3.11.

4.12 (2022-03-30)

• Add support for Python 3.9 and 3.10.

4.11 (2021-01-21)

• Use standard conforming \r\n line endings. This may require adaptations in testsSupport messages with line separation \r\n (#35).

4.10 (2020-07-31)

• We depend on zope.sendmail >= 5.1.

• Support messages with explicit Content-Transfer-Encoding: 8bit (#30).

4.9 (2020-02-12)

• Fix DeprecationWarnings from DocumentTemplate with import changes

4.8 (2020-01-06)

• Show a hint in the ZMI if the delivery queue is forced to queue-only mode (#25)

• Improve the asynchronous delivery information on the ZMI Edit tab (#24)

• Fix queued mail delivery with just a single string receiver email (#26)

• Fix Flake8 issues. (#22)

4.7 (2019-06-03)

• Do not start QueueProcessorThread on configuration update. (#14)

4.6 (2019-05-16)

• Fix breaking sendmail tag rendering with DocumentTemplate > 3

4.5 (2019-04-07)

• Prevent ZMI blowups when pointing to a non-Maildir queue folder (#2)

• Changed ZMI forms for Zope 4 ZMI compliance (#17)

• Packaging and test configuration cleanup

• Add badges to the README

4.4 (2019-04-03)

• Add ability to disable sending of queued mails. Details see README.rst. (#14)

4.3 (2019-03-08)

• silence deprecation warning due to non-raw regex (#13)

• Specify supported Python versions using python_requires in setup.py (Zope#481)

• Add support for Python 3.8

4.2 (2018-10-05)

• Add icon for Bootstrap ZMI.

• Fix start-up in case Products.GenericSetup is not installed. (#9)

• Add support for Python 3.7.

4.1 (2018-05-20)

• Fix GenericSetup support for GenericSetup 2.x

• Fix DeprecationWarnings

• PEP-8 code style compliance

• Drop support for Python 3.4

4.0 (2017-09-14)

• Move GenericSetup export/import support from the GenericSetup package to MailHost as a setuptools extra.

• Python 3 compatibility

• Require Zope 4, aka drop Zope 2.13 support.

• add test coverage reporting

• Use @implementer class decorator.

• Drop long-deprecated support for uuencoded emails.

3.0 (2016-07-18)

• Remove HelpSys support.

2.13.2 (2014-11-02)

• Adjust tests to pass with latest zope.sendmail versions.

• Specify detailed distribution dependencies.

2.13.1 (2010-09-25)

• LP #642728: Fixed TypeError on nested multi part messages in MailHost.

2.13.0 (2010-07-13)

• Released as separate package.