Not sure if you're asking how to "trap" items without reverse DNS?
It would be a line like this in the GLOBAL.CFG:
WHITELIST AUTH
REVDNS revdnsexists x x 5
0
(which would add a weight of 5 if there is no reverse DNS - but whitelist
your clients who have no reverse DNS but still should be permitted to
connect to your SMTP relay).
Then, you could pick up on that test name in your $default$.junkmail, and
decide what action you might want, e.g.:
REVDNS ALERT
or
REVDNS HOLD
Or
REVDNS LOG
Etc.
From: [email protected] [mailto:[email protected]] On Behalf Of Dave
Beckstrom
Sent: Monday, February 14, 2011 2:07 PM
To: [email protected]
Subject: RE: [Declude.JunkMail] Blocking on no REV DNS?
Headers from a typical email with missing reverse DNS:
Received: from UnknownHost [208.94.247.117] by xxxxxx
X-RBL-Warning: REVDNS: This E-mail was sent from a MUA/MTA
208.94.247.117 with no reverse DNS entry.
What is the best way to filter on no reverse DNS?
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