Hi,
This is a really big one too, and is probably required for CAN-SPAM act. Say you get some Dummy that claims you spammed him/her, and wants to make your life miserable by replying like - "Do that again and I'll get you", or "sue you", or "report you", or on and on it goes, I've seen them all....
It would be great to have a GLOBAL Banned Email address list, that would allow entering those Email addresses (and/or domains). Whenever an Email is sent out, those addresses/domains are automatically removed before ANY email is sent.
Solves the problem and works perfectly... how soon can we see this?