>Note  that  this  can  be worked around by a knowledgeable user, as it
>relies  on  the MAIL FROM address. Only the Control Access option will
>give you complete protection (barring IP spoofing).

Yep, same problem with IMGate, the use only has to use another :

Mail from: sender@senderdomain

... and the filter is circumvented.

As somebody said here before, "no headers can be trusted", so header-based 
ACL is weak.

Len


http://MenAndMice.com/DNS-training
http://BIND8NT.MEIway.com : ISC BIND 8.2.4 for NT4 & W2K
http://IMGate.MEIway.com  : Build free, hi-perf, anti-abuse mail gateways


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