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From Apache Wiki <>
Subject [Spamassassin Wiki] Update of "Rules/RDNS NONE" by LeeMaguire
Date Thu, 07 Feb 2008 15:46:12 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Spamassassin Wiki" for change notification.

The following page has been changed by LeeMaguire:

New page:
#language en
== SpamAssassin Rule:  RDNS_NONE ==

''Standard description:'' Delivered to trusted network by a host with no rDNS

=== Explanation ===

This test checks to see if there is a reverse DNS entry for the last untrusted relay.

Note that this may be done by interpreting information in the relevant Received header - if
reverse DNS checks are not performed by the first trusted relay, or if they are not recorded
in the Received header, this test will be triggered (regardless of the actual rDNS status).

=== Further Information ===

The default scores for this rule can be found [ in
the online list of tests].

The IETF's [ dnsop] working group
has a draft memo regarding the [
use of reverse DNS for testing].


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