SMTP Authorization

Stephen Swaney steve.swaney at
Tue Jul 18 19:05:39 IST 2006

> -----Original Message-----
> From: mailscanner-bounces at [mailto:mailscanner-
> bounces at] On Behalf Of Jeff Graves
> Sent: Tuesday, July 18, 2006 1:41 PM
> To: 'MailScanner discussion'
> Subject: SMTP Authorization
> I've been looking for a SMTP server authorization mechanism. Basically, it
> would work something like a system connects trying to send mail that's
> from
> user at - the receiving server queries the DNS records for
> and checks that the connecting IP is authorized to send mail
> for
> the domain. Plugging this into a MailScanner install could do a
> couple of things: block it, force greylist milter, assign a higher
> spamassassin score (or whitelist), etc. I've seen a few drafts out there
> for
> such an implementation but no working software. Does anything exist
> (preferably that works with MailScanner and sendmail)?
> --
> Jeff Graves, MCSA
> Image Source, Inc.
> 508.966.5200 x31

Looks like you're looking for SPF and milters. Check out:	


Stephen Swaney
Fort Systems Ltd.
stephen.swaney at

More information about the MailScanner mailing list