Email address spoofing

Henry Kwan lists at
Fri Oct 3 01:56:18 IST 2008

Alex Neuman van der Hans <alex <at>> writes:

> 3. Use a milter such as milter-null, which signs each outgoing  
> message, so that bounces that did not originate from your server are  
> not received. Leverage this with MailScanner's "Watermark" feature so  
> that your server doesn't accept or deliver spoofed messages.


If you are already using the MailScanner "watermark" feature, is milter-null
needed?  Is there concern that the watermark can be spoofed?


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