The reason why I even suggested this is that I don't see a lot different IP addresses. I figured the Postfix system wouldn't need to cache that many "bad" IP addresses. You guys obviously see differently.
My mail logs rotate at 12AM every night, this is just one IP address in 8.5 hours : $ more /var/log/maillog | grep -c 'CONNECT from \[103\.129\.47\.19\]' 1004 That's just *one* IP address attempting to deliver spam 1000+ times. Isn't it a waste of the DNSBL resources telling me 1000 times in 8 hours that this IP address is up to no good? That's why it would be nice to blacklist the offending IP address for 24-48 hours and keep resources free for legitimate connections. -- Sent from: http://postfix.1071664.n5.nabble.com/Postfix-Users-f2.html