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==================
Suspicious headers
==================
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
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