li...@lazygranch.com:
> I'm wondering if I have my rate limiting set up correctly. Note I have
> that perl script that sniffs out dynamic IP addresses, so I am not sure
> how this user is even getting concurrent connections.
Postfix receives more than 4 concurrent connections at a rate of
more than 10 connections over some time interval, and closes
excess connections.
If you want to prevent that such connections reach Postfix, then
you need to do that *outside* Postfix, during the TCP handshake.
Postfix does not implement TCP. That happens in the kernel.
Wietse
