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

This will surprise some of your readers, but my primary interest is not with computer security. I am primarily interested in writing software that works as intended.

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.

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.

As of today, the Postfix mail transport agent has almost 50,000 lines of code, comments not included.

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.