Hi Scott
Second the manual we can have up to 20 IPBYPASS entries.
At the moment I'm already over this limit:
IPBYPASS 194.242.192.2 # local providers
IPBYPASS 194.242.192.3
IPBYPASS 194.242.196.14
IPBYPASS 213.21.176.244
IPBYPASS 213.21.176.246
IPBYPASS 195.254.224.4
IPBYPASS 193.70.192.33 # Virgilio
IPBYPASS 193.70.192.38
IPBYPASS 193.70.192.46
IPBYPASS 193.70.192.51
IPBYPASS 193.70.192.52
IPBYPASS 193.70.192.62
IPBYPASS 193.70.192.127
IPBYPASS 212.216.176.58 # Tin
IPBYPASS 212.216.176.185
IPBYPASS 212.216.176.187
IPBYPASS 212.216.176.206
IPBYPASS 212.216.176.221
IPBYPASS 212.216.176.222
IPBYPASS 212.216.176.223
IPBYPASS 212.216.176.224
The first block are MTAs from other local ISPs where we have setup numerous mail
forwardings. So we can search for open relays also on this forwarded messages.
The seconds and third block are groups of MTAs of two large italian ISPs. All this IPs
are listed now for over 3 months in more or less IP blacklists.
The problem is, that we receive much more legit messages from this IPs as spam.
(usually over 95% is legit). More then 75% of our FPs are FPs because they triggered
this IP blacklist tests.
Until yesterday I've tried to counterweight this points with an IP filterlist that
gives some negative points.
The problem is that numerous IP blacklist providers are adding and removing part of
this IP ranges daily/weekly. So it's nearly impossible to define an accurate
counterweight for the IP filter file. If I substract too much this will let pass more
spam messages. Otherwise I will have much more FPs.
The problem can be solved by adding this IPs to thy IPBYPASS list, because so all this
IPs are ignored and we can try to catch spams with the remaining tests.
Would it by possible to specify IPBYPASS-ranges or to use an external IP file?
Markus
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