[Mimedefang] configuring mimedefang-filter to reject during smtp

[Tilman Schmidt]

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Am 2010-01-18 01:44 schrieb Tony:
> Can anyone provide a mimedefang-filter example that shows the correct
> syntax to reject during smtp? [...] In the mimedefang-filter file I see
> entries to change the header and do this and that but all I'm intetested
> in is rejecting during smtp. Thanks for any advice.

The key is the action_bounce method. As an example, here's a patch hunk
for mimedefang-filter to reject messages with suspicious characters in
headers during the SMTP dialogue instead of dropping them (beware of
line wraps):

@@ -118,7 +130,9 @@
 	md_graphdefang_log('suspicious_chars');
 	# action_quarantine_entire_message("Message quarantined because of
suspicious characters in headers");
 	# Do NOT allow message to reach recipient(s)
- -	return action_discard();
+	# Don't discard; bounce as per #ss9.5
+	# return action_discard();
+	return action_bounce("Message rejected; illegal characters in message
(per RFC 2821, 2822)");
     }

     # Copy original message into work directory as an "mbox" file for


HTH
T.

- -- 
Tilman Schmidt
Phoenix Software GmbH
Adolf-Hombitzer-Str. 12
53227 Bonn, Germany
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