Whitelisting problem

Derek Winkler dwinkler at ALGORITHMICS.COM
Tue Jan 7 17:39:17 GMT 2003

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.

-----Original Message-----
From: Julian Field [mailto:mailscanner at ecs.soton.ac.uk]
Sent: Tuesday, January 07, 2003 11:56 AM
To: MAILSCANNER at jiscmail.ac.uk
Subject: Re: Whitelisting problem

At 16:50 07/01/2003, you wrote:

>IBM is a partner of ours so I have whitelisted ibm.com
>But now some spammer is forging both the envelope and header to look like
>it cam from ibm.com
>The spammer appears to be creating random addresses ending in @ibm.com
>Is my only choice to remove ibm.com from the whitelist?

If ibm.com only use a few outgoing mail servers, you could whitelist their
IP addresses instead.
Julian Field
MailScanner thanks transtec Computers for their support
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