Defect-free software does not exist.

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

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

Wietse Venema

Adding functionality is not just a matter of adding code.

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

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

In a previous life I wrote the software that controlled my physics experiments. That software had to deal with all kinds of possible failures in equipment. That is probably where I learned to rely on multiple safety nets inside and around my systems.

Wietse Venema

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

Wietse Venema

Lack of documentation is becoming a problem for acceptance.

Wietse Venema