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Have a good one,
Christian 

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Scott Smith
Sent: Monday, June 20, 2005 9:55 AM
To: Imail Forum
Subject: [IMail Forum] Block messages that claim to come from my domain

Is there a way to block all messages that are "from" my domain but are not 
valid accounts or aliases setup in my domain?  We've been getting a lot of 
infected zip files lately that are claiming to come from email addresses 
that don't exist in our domain.  I realize that I can just explicitly block 
those that I've identified, but I want to know if there's a way to block 
future ones as well without explicitly knowing what they are.

Thanks,

Scott Smith
Network Administrator
248.489.1999
[EMAIL PROTECTED]

Westside & Detroit Reprographics
An ARC Company
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