Re: ***SPAM*** Re: Massive SPAM Increase {-2.6} {-2.6}

[Paul Schmehl <pauls () utdallas edu>]

--On October 13, 2006 10:46:34 PM -0400 Valdis.Kletnieks () vt edu wrote:

> On Mon, 09 Oct 2006 13:33:12 CDT, Paul Schmehl said:
>
> (Digging out from a long week of other stuff, sorry for the late
> response)
>
> > Its purpose is to reject *all* mail from bogus MTAs - dialups,
> > misconifigured servers, MTAs that aren't registered in the domains' DNS
> > as a "legal" MX, MTAs that don't reverse properly, etc., etc.  If the
> > email is
>
> "mta that aren't registered in the DNS as a "legal" MX" - tell me Paul,
> how does that work with any site that's big enough that they run split
> inbound MX and outbound servers?
Send me an email at geek () stovebolt com, and I'll tell you.

I'm not sure what you mean by "split inbound and outbound", but any 
outbound MX host *should* be listed in DNS.  You only list one - 
smtp.vt.edu.  192.82.162.213 is reversible, so it would get points for 
being honest about its IP/hostname, but it would lose points for not being 
listed in DNS as an MX.  The overall score would determine if the mail was 
rejected, but I doubt that it would be.

Easy enough to tell.  Send me mail.

Paul Schmehl (pauls () utdallas edu)
Adjunct Information Security Officer
The University of Texas at Dallas
http://www.utdallas.edu/ir/security/


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