Mailman 3 Shell

Mailman 3 comes with a shell that allows to work directly on a list from Python's REPL. Use it wisely.

Troubleshooting

Step by step example: change the size of message attachments

• become the mailman

su mailman

• go to the venv home (important!)

cd ~/env

• start the shell with the list, the settings of which you want to edit:

mailman withlist mylist@we.lurk.org

• assign new value to max_message_size. Each unit is 1024 bytes, so 500K would be simply

m.max_message_size = 500

• quit the shell

exit()  # or Ctrl-D

• Done! Enjoy your mailchimp forwards!

List all the subscribed emails from all lists

su mailman
cd ~/env
mailman shell 
>>> lm = getUtility(IListManager)
>>> for mlist in lm.mailing_lists:
...     for member in mlist.members.members:
...             print(member.address.email, mlist.list_name)
...
<lots of stuff>

Re-enable accounts that have been disabled for excess bounce

su mailman
cd ~/env
mailman shell -l listname@we.lurk.org
>>> for member in m.members.members:
...     if member.delivery_status == DeliveryStatus.by_bounces:
...         member.preferences.delivery_status = DeliveryStatus.enabled
...         print("Re-enabled delivery for bouncing member {} on list {}"
...               .format(member.address.email, mlist.list_name))
...
<lots of stuff>
>>> commit()
>>> exit()