New way of spam?

Greg Matthews gmatt at
Fri May 16 09:36:24 IST 2008

Steven Andrews wrote:
> For watermarking to operate correctly, do I have to use the MS box as an
> outbound relay as well?  Right now, I'm habitually using them only on
> inbound and not currently using watermarking.  I find that when I use
> watermarking, my SA rules don't fire.

there are ways around this. Depends on your MTA - I can only speak for 
sendmail. If you use sendmail you can try milter-null, I found it works 
great, you'll need to install it on your outbound as well as your 
inbound and share the "secret" between them.

I believe postfix can also use sendmail milters but postfix may have its 
own solution too.

If you're using Exchange outbound then you're probably out of luck!


Greg Matthews           01491 692445
Head of UNIX/Linux, iTSS Wallingford

This message (and any attachments) is for the recipient only. NERC
is subject to the Freedom of Information Act 2000 and the contents
of this email and any reply you make may be disclosed by NERC unless
it is exempt from release under the Act. Any material supplied to
NERC may be stored in an electronic records management system.

More information about the MailScanner mailing list