>But what do you do, if spammers IP constantly change if he is dialling in
>via call by call ?
>Then only blocking of IP-classes would help.
All relayers must use authentification, preferably SMTP AUTH, or
POP-B4-SMTP, even if they relay from trusted ip's. There simply is
no other way to be safe from relay hijacking, esp there is no safety
in trusting msg headers.
Len
http://BIND8NT.MEIway.com: ISC BIND 8.2.2 p5 & 8.2.3 T6B for NT4 & W2K
http://IMGate.MEIway.com: Build free, hi-perf, anti-spam mail gateways
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