Adding functionality is not just a matter of adding code.

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

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.

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.

Windows favors multi-threading, which means that a service is implemented by one single process.

Coming back to the topic of computer security, the TCP Wrapper is an example of such a safety net. I wrote it when my systems were under attack by someone who appeared to walk through walls.