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

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.

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.

I have often said social media is a race to the bottom.

A free and open Internet is essential to our democracy, economy, and modern way of life.

Lauren Goode and I have agreed that the next version of the Mac software - all of them are named after places in California - should be named either Bridgeport or Warwick.

The future is electronic. It's radio, television and the Internet; it's not really newspapers anymore.