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

Wietse Venema

However, writing software without defects is not sufficient. In my experience, it is at least as difficult to write software that is safe - that is, software that behaves reasonably under adverse conditions.

Wietse Venema

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

Wietse Venema

The Postfix security model is based on keeping software simple and stupid.

Wietse Venema

One bug in an SMTP server can open up the whole machine for intrusion.

Wietse Venema

Sure, but competition is good for the user.

Wietse Venema

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

Wietse Venema

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

Wietse Venema

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.

Wietse Venema

Most of the effort in the software business goes into the maintenance of code that already exists.

Wietse Venema