My reply is: the software has no known bugs, therefore it has not been updated.

I want to avoid locking people into solutions that work only with Postfix. People should have a choice in what software they want to use with Postfix, be it anti-virus or otherwise.

Like all software, Qmail can survive only when it keeps up with changing requirements.

Postfix keeps running even if one Postfix process dies; Windows requires that someone restarts the service.

I don't expect an overnight change of all desktops to what the US Military used to call B3 level security. And even that would not stop users from shooting themselves into the foot.

Sure, but competition is good for the user.

Lack of documentation is becoming a problem for acceptance.