Hi,

I want to block all (ALL!) SMTP traffic from the whole "attbi.com" 
IP address range for my private mail server.

I know this is kinda rude and I also know I can do this in SMTP config.

But I want a "you won't even connect at SMTP" solution in that case :-(

Can anyone recommend a package here / solutions here? Or, on the other 
hand, is it possible to find out the address range of a provider (for 
blocking IP-based in ipf then).

Thanks
Florian