I was going to visit IBM for six months as a visiting scientist. Now, six months is a lot of time, so I came with a whole list of projects that I might want to work on.

Writing software that's safe even in the presence of bugs makes the challenge even more interesting.

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

The challenge with Postfix, or with any piece of software, is to update software without introducing problems.

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.

Qmail out of the box works fine, so people will want to use it regardless of licensing restrictions, even when the software does not ship with their system software.