>From: RW <rwmailli...@googlemail.com> >Sent: Sunday, November 22, 2015 3:23 PM >To: users@spamassassin.apache.org >Subject: Re: question re/ RDNS_NONE
>On Sun, 22 Nov 2015 13:39:49 +0000 >David Jones wrote: >> https://wiki.apache.org/spamassassin/Rules/RDNS_NONE >> >> RDNS_NONE checks more than just the PTR (reverse) DNS record. >> It really should be named FCRDNS_NONE >Then the wiki is wrong. Could this be dependent on the MTA used? I am using Postfix which puts in Received headers like this: Received: from econnect.dmsgs.com (unknown [8.224.216.57]) That IP has a PTR record but it doesn't match the SMTP HELO of econnect.dmsgs.com so Postfix is putting in the 'unknown' causing the RDNS_NONE hit on more than just no rDNS. This has been true for years in my SpamAssassin platform filtering about 95K mailboxes so in my case, the RDNS_NONE does mean a FCrDNS (full circle DNS) check failed and the wiki is correct. Maybe this SA rule works differently on other MTAs. Dave
