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|
===========
LTMP server
===========
Mailman can accept messages via LMTP (RFC 2033). Most modern mail servers
support LMTP local delivery, so this is a very portable way to connect Mailman
with your mail server.
Our LMTP server is fairly simple though; all it does is make sure that the
message is destined for a valid endpoint, e.g. mylist-join@example.com.
Let's start a testable LMTP queue runner.
>>> from mailman.testing import helpers
>>> master = helpers.TestableMaster()
>>> master.start('lmtp')
It also helps to have a nice LMTP client.
>>> lmtp = helpers.get_lmtp_client()
(220, '... Python LMTP queue runner 1.0')
>>> lmtp.lhlo('remote.example.org')
(250, ...)
Posting address
===============
If the mail server tries to send a message to a nonexistent mailing list, it
will get a 550 error.
>>> lmtp.sendmail(
... 'anne.person@example.com',
... ['mylist@example.com'], """\
... From: anne.person@example.com
... To: mylist@example.com
... Subject: An interesting message
... Message-ID: <aardvark>
...
... This is an interesting message.
... """)
Traceback (most recent call last):
...
SMTPDataError: (550, 'Requested action not taken: mailbox unavailable')
Once the mailing list is created, the posting address is valid.
>>> create_list('mylist@example.com')
<mailing list "mylist@example.com" at ...>
>>> transaction.commit()
>>> lmtp.sendmail(
... 'anne.person@example.com',
... ['mylist@example.com'], """\
... From: anne.person@example.com
... To: mylist@example.com
... Subject: An interesting message
... Message-ID: <badger>
...
... This is an interesting message.
... """)
{}
Sub-addresses
=============
The LMTP server understands each of the list's sub-addreses, such as -join,
-leave, -request and so on. If the message is posted to an invalid
sub-address though, it is rejected.
>>> lmtp.sendmail(
... 'anne.person@example.com',
... ['mylist-bogus@example.com'], """\
... From: anne.person@example.com
... To: mylist-bogus@example.com
... Subject: Help
... Message-ID: <cow>
...
... Please help me.
... """)
Traceback (most recent call last):
...
SMTPDataError: (550, 'Requested action not taken: mailbox unavailable')
But the message is accepted if posted to a valid sub-address.
>>> lmtp.sendmail(
... 'anne.person@example.com',
... ['mylist-request@example.com'], """\
... From: anne.person@example.com
... To: mylist-request@example.com
... Subject: Help
... Message-ID: <dog>
...
... Please help me.
... """)
{}
Clean up
========
>>> master.stop()
|
