The outgoing handler

Mailman’s outgoing queue is used as the wrapper around SMTP delivery to the upstream mail server. The to-outgoing handler does little more than drop the message into the outgoing queue.

>>> from import create_list
>>> mlist = create_list('')

Craft a message destined for the outgoing queue. Include some random metadata as if this message had passed through some other handlers.

>>> from mailman.testing.helpers import (specialized_message_from_string
...   as message_from_string)
>>> msg = message_from_string("""\
... Subject: Here is a message
... Something of great import.
... """)

>>> msgdata = dict(foo=1, bar=2, verp=True)
>>> from mailman.config import config
>>> handler = config.handlers['to-outgoing']
>>> handler.process(mlist, msg, msgdata)

While the queued message will not be changed, the queued metadata will have an additional key set: the mailing list name.

>>> from mailman.testing.helpers import get_queue_messages
>>> messages = get_queue_messages('out')
>>> len(messages)
>>> print(messages[0].msg.as_string())
Subject: Here is a message

Something of great import.
>>> from mailman.testing.documentation import dump_msgdata
>>> dump_msgdata(messages[0].msgdata)
_parsemsg: False
bar      : 2
foo      : 1
listid   :
verp     : True
version  : 3