Postfix keeps running even if one Postfix process dies; Windows requires that someone restarts the service.
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.
The Postfix security model is based on keeping software simple and stupid.
The challenge with Postfix, or with any piece of software, is to update software without introducing problems.
As of today, the Postfix mail transport agent has almost 50,000 lines of code, comments not included.