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How to reject_unknown_reverse_client_hostname in postfix 2.1 ?

From: Alexander Grüner (agruenergmx.de)
Date: Mon Jun 19 2006 - 02:10:27 CDT


Hello :-)

I am running postfix-2.1.5-3.4 on SuSE Linux 9.2.

Now I want to block all mails from "MX" with just an IP adress as DNS,
like 124.199.17.57, where

nslookup 124.199.17.57
** server can't find 57.17.199.124.in-addr.arpa: NXDOMAIN

In Postfix > 2.3 reject_unknown_reverse_client_hostname would be fine -
as far as I understand. If I can't update immedeatly to 2.3 - is this
possible for my postfix version, too ?

Rgeards,
Alexander
Munich, Germany