Once again I will point out the problems of verifying mail based on PTR
records, only this time I have a very good example.
On Tue, 23 Nov 2004 19:12:51 GMT, I received a message from a server at
<139.142.165.243> without any problems.
--------------------------------------------------------
Received: from majesty (localhost [127.0.0.1])
by majesty.pobox.com (Postfix) with ESMTP id 72ABCDCE6D
for <couttsjd(_at_)yellowhead(_dot_)com>; Tue, 23 Nov 2004 14:17:01
-0500 (EST)
Received-SPF: none (majesty.pobox.com: domain of
fireplaces(_at_)pentictonhomehardware(_dot_)com does not designate permitted
sender
hosts)
X-SPF-Guess: pass (seems reasonable for
fireplaces(_at_)pentictonhomehardware(_dot_)com to mail through 139.142.165.243)
Received: from geodome.polar.bc.ca (geodome.polar.bc.ca [139.142.165.243])
by majesty.pobox.com (Postfix) with ESMTP id 734E1DF8E7
for <couttsj(_at_)pobox(_dot_)com>; Tue, 23 Nov 2004 14:16:58 -0500
(EST)
Received: from jimfireplace (unverified [207.194.164.169]) by
geodome.polar.bc.ca
(Rockliffe SMTPRA 4.2.2) with ESMTP id
<B0000449911(_at_)geodome(_dot_)polar(_dot_)bc(_dot_)ca>
for <couttsj(_at_)pobox(_dot_)com>;
Tue, 23 Nov 2004 11:12:51 -0800
---------------------------------------------------------
Yet, on Tue, 23 Nov 2004 22:58:22 GMT, a message from the same server got
blocked by pobox.com.
--------------------------------------------------------
Received: from kelvin (localhost [127.0.0.1])
by kelvin.pobox.com (Postfix) with ESMTP id 35C9A1A0C6D
for <couttsjd(_at_)yellowhead(_dot_)com>; Tue, 23 Nov 2004 18:01:44
-0500 (EST)
X-Pobox-Antispam: Require PTR Record returned DENY: 139.142.165.243 has no
PTR record
X-Sift-Reason: require_ptr returned DENY: 139.142.165.243 has no PTR record
X-Sift-From: fireplaces(_at_)pentictonhomehardware(_dot_)com
Received: from geodome.polar.bc.ca (unknown [139.142.165.243])
by kelvin.pobox.com (Postfix) with ESMTP id 9FF1E1A0A10
for <couttsj(_at_)pobox(_dot_)com>; Tue, 23 Nov 2004 18:01:40 -0500
(EST)
Received: from jimfireplace (unverified [207.194.164.169]) by
geodome.polar.bc.ca
(Rockliffe SMTPRA 4.2.2) with ESMTP id
<B0000449993(_at_)geodome(_dot_)polar(_dot_)bc(_dot_)ca>
for <couttsj(_at_)pobox(_dot_)com>;
Tue, 23 Nov 2004 14:58:22 -0800
--------------------------------------------------------
Why did the reverse lookup suddenly stop working? There are basically two
servers with authority for the 142.139.in-addr.arpa domain
(ns2.toroon.groupetelecom.net & ns1.clgrab.groupetelecom.net). The first
one directs you to the root servers, and the second directs you to
ns1.vip.net & ns2.vip.net. So it all depends on which one your server asks
as to whether or not it gets the proper answer.
"BUT THE SERVER IS BROKEN!" you say. So what; just try to get it fixed.
J.A. Coutts