Mark wrote:
-----Original Message-----
From: John Rudd [mailto:[EMAIL PROTECTED]
Sent: donderdag 19 oktober 2006 23:38
To: Giampaolo Tomassoni
Cc: users@spamassassin.apache.org
Subject: Re: R: Scoring PTR's
RFC 1912, section 2.1, 2nd paragraph:
Make sure your PTR and A records match. For every IP address, there
should be a matching PTR record in the in-addr.arpa domain. If a
host is multi-homed, (more than one IP address) make sure that all IP
addresses have a corresponding PTR record (not just the first one).
I now see the cause of your confusion. "Make sure your PTR and A records
match", in this context, means, exactly as the RFC states, that "For every
IP address, there should be a matching PTR record in the in-addr.arpa
domain." And "That all IP addresses have a corresponding PTR record."
AND that the PTR record point back to a valid A record.
I'm not the one who is confused here.
It does NOT say "The PTR of an IP address should match that of an A record
with the same name."
Further into the same paragraph it says:
Also, PTR records must point back to a valid A record,
Given that the point of this paragraph is "Make sure your PTR and A
records match", I would comfortably assert that one necessary element to
making this A record "valid" is that at least one such A record from
that hostname matches the IP address for that PTR record. Otherwise,
they don't match, and thus the thesis of the paragraph is not satisfied.
