http://bugzilla.spamassassin.org/show_bug.cgi?id=3417
------- Additional Comments From [EMAIL PROTECTED] 2004-05-26 09:58 -------
Subject: Re: New Rule: Checking sender IP against MX records From: [EMAIL
PROTECTED]
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>The draft/your rule overloads "MX", which is meant to specify "when
>sending mail to this host/domain, try delivering mail to a specific list
>of mail orders using a specific set of priorities". The overload is that
>"MX" is now also supposed to specify which servers can send mail as the
>host/domain. A "correct" solution would be to make a new RR, say "MS"
>which you can then use to specify senders since they are quite commonly
>different than the hosts that receive mail. This is what SPF does, right
>now using TXT records, but there is talk about creating a new RR for this
>purpose.
One key problem with this is that most (note: not some, MOST) large ISPs
use separate servers for incoming and output SMTP traffic. So in
other words this test will fire on everything from:
yahoo.com
gmail.com
msn.com
aol.com
etc. etc.
- --j.
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