[Bug 3417] New Rule: Checking sender IP against MX records From: user@domain

[bu...@bugzilla.spamassassin.org]

https://issues.apache.org/SpamAssassin/show_bug.cgi?id=3417





--- Comment #48 from mouss <mo...@netoyen.net>  2008-11-04 23:17:43 PST ---

>According
>ftp://ftp.rfc-editor.org/in-notes/internet-drafts/draft-stout-antispam-00.txt
>it is recomended to Register all sender MTAs within DNS as MX records
>with special priority (65535)

According to
ftp://ftp.nordu.net/ietf-online-proceedings/05mar/proceedings/IDs/draft-stout-antispam-01.txt

"
This Internet-Draft has been deleted. Unrevised documents placed in the
Internet-Drafts directories have a maximum life of six months. After
that time, they are deleted. This Internet-Draft was not published as
an RFC.

The name of the internet-draft was draft-stout-antispam-00.txt

...
"

so it's expired. dead. 

on the other hand, checking the MX may be used in zombie detection: if client
looks dynamic, but it is the MX of the sender domain, then reduce the score (if
it was increased due to *DYN* and *DHCP* ... rules). of course, this can be
abused by spammers... 


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