Suspicious headersΒΆ

Suspicious headers are a way for Mailman to hold messages that match a particular regular expression. This mostly historical feature is fairly confusing to users, and the list attribute that controls this is misnamed.

>>> mlist = create_list('_xtest@example.com')
>>> rule = config.rules['suspicious-header']
>>> print(rule.name)
suspicious-header

Set the so-called suspicious header configuration variable.

>>> mlist.bounce_matching_headers = 'From: .*person@(blah.)?example.com'
>>> msg = message_from_string("""\
... From: aperson@example.com
... To: _xtest@example.com
... Subject: An implicit message
...
... """)
>>> rule.check(mlist, msg, {})
True

But if the header doesn’t match the regular expression, the rule won’t match. This one comes from a .org address.

>>> msg = message_from_string("""\
... From: aperson@example.org
... To: _xtest@example.com
... Subject: An implicit message
...
... """)
>>> rule.check(mlist, msg, {})
False