Whitelisting problem

Derek Winkler dwinkler at ALGORITHMICS.COM
Tue Jan 7 18:32:30 GMT 2003

SpamAssassin gets these from the headers and they're easily forged.

My feature would be whitelist only if received from a server which reverse
looks up as being that domain.

Two different mechanisms.

-----Original Message-----
From: Matt Kettler [mailto:mkettler at EVI-INC.COM]
Sent: Tuesday, January 07, 2003 1:28 PM
To: MAILSCANNER at jiscmail.ac.uk
Subject: Re: Whitelisting problem

hmm why not:

whitelist_from_rcvd *@ibm.com ibm.com

The second part of the command does not have to be a complete server name.
Just a substring of it. So if any of the mailservers are reported as
(something).ibm.com in the received headers, this will have the same effect
as your "lookup" feature.

At 12:39 PM 1/7/2003 -0500, you wrote:

>Don't think I'd be able to find what servers they send out all their mail
>Possible feature:
>Whitelisting based on reverse name lookups.
>If the email was sent from a server that reverse looks up as domain then
>From: *@ibm.com lookup
>lookup as an additional parameter to yes no.
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