>The reason why they send to the backup mailserver is pretty obvious, I can't
>block that IP address.
>
>I guess the only solution is to setup a filter on each server.
No, if you aren't running postfix, install postfix and I'll send you
the IMGate config files. Then make the Linux machine you're primary
MX and take Imail out of DNS. Even block access to its port 25, if
you don't have mail roamers.
I'm pretty sure some of the spammers attack all MX hosts founds in
DNS, not distinguishing between primary, secondary, or whatever MX.
Len
http://MenAndMice.com/DNS-training Austin,TX: 23,24/04; SFO,CA:
7,8/05
http://BIND8NT.MEIway.com : ISC BIND 8.2.3 "NT3" for NT4 & W2K
http://IMGate.MEIway.com : Build free, hi-perf, anti-abuse mail gateways
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