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.

Defect-free software does not exist.

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.

I don't expect an overnight change of all desktops to what the US Military used to call B3 level security. And even that would not stop users from shooting themselves into the foot.

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 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.

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.

When I write software, I know that it will fail, either due to my own mistake, or due to some other cause.

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

Sure, but competition is good for the user.

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

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

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

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.

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.

For many people my software is something that you install and forget. I like to keep it that way.

At the time the Sendmail program had a very poor reputation with respect to security, with four root vulnerabilities per year for two successive years.

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

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

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

Postfix keeps running even if one Postfix process dies; Windows requires that someone restarts the service.

Lack of documentation is becoming a problem for acceptance.

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

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.

My reply is: the software has no known bugs, therefore it has not been updated.

Adding functionality is not just a matter of adding code.

'Batman' took 10 months to film, and by the time I stopped working on it, it took a long time before my English accent came out again. I was actually having to try for it.

Given six months to live and being the fighter that I am, I set high goals for myself.

It wasn't my plan to create such a record. All I did was put in the effort to win every match I played and it went on for weeks, months and years until my defeat to Ross Norman in Toulouse in 1986.

It was pretty extensive - we worked out 8 hours a day, 5 days a week, for 3 months, which I think is more than anybody in the Olympics. I thought well I don't need this, the girls need it, but it was a gift.

I would not be gotten into a schoolhouse until I was eight years old. Nor did I accomplish much after I started. I doubt if I had gone to school six months in all when my father died. I was fourteen at the time.

We all laughed. It was more like that whole thing that I was talking about earlier. You go to training camp and after the season is over, you might not see the guys for six months until you go back to training camp.

Oh yeah, I mean, it wasn't a very good guitar, most good guitars have got thrust rods in the necks that you can adjust or that'll keep them in shape, you know keep them straight. This one just, well it turned into a bow and arrow after a couple of months.

I am a writer. I could not afford to take 15 months off from my writing career to play detective.

You know, I live a monastic lifestyle. No, I do. I do live in extremes, basically. I go back and forth. Once every six months, I'll have a day where I eat more chocolate than has ever been consumed by a human being.

I knew that if I wrote a new book every six months or every year, if I continued to read great books, eventually I would write something worthy of publication. I understood I might be in my forties or my fifties or even my sixties, but I felt confident that it would happen.

The penalty for laughing in a courtroom is six months in jail; if it were not for this penalty, the jury would never hear the evidence.

I think a benefit is that we try to put it up in a short time. From the decision to do this mission until we fly, it's six months and one week or so, so it's a very short time.

One day my wife went and saw the accountant and said she's pulling the plug. She said you guys are done. I said, how bad can it be? 10 grand? She said you're not even close. It came out to almost $50,000 in alcohol for two months.

Well, by the end of the millennium, five, six months from now, we hope to somehow manage to move into a new location where we have the whole building, so we can devote space to all our activities.

The accent got lost somewhere along the way. I'm a little embarrassed about it. When I arrived in LA I assumed I'd be able to put on the American accent. It proved difficult so I had six months working with a dialect coach and it's become a habit.

I went from 118 pounds to 135 pounds in a few months. But, I still didn't know anything about food.

But since day one, we've always been kinda up against it. So at the end, it's not surprising that we were kind of led along for so many months and didn't know what the fate of the show was gonna be. It was... in a weird way, just kind of that was the way it's always been.

It gets kinda monotonous, but that's television. There are plus sides and down sides. The positive side is that you have steady work for nine months of the year for however many years your show is on TV,.

There's no way that I could do a 9 to 5 job. There's no way. I was not cut out for that. You come in and you work for three months on the one job. They say, 'Great,' you know, and you're on to the next one - and you never even got fired. It's wonderful.

I was 20 years old at Pearl Harbor. I was in the Navy about a year and four months before the war.

The reality is, it will be a significant conflict going for many, many months, if not longer. Saddam Hussein is not a fool. He hasn't been sitting there waiting to get shot for 13 years.

And also it was a process of, we lifted weights as well, in an effort to train my body to then be able to lift heavier weights when I got in Australia. So that was the first couple of months.

There's no huge, deep message in any of the songs. We recorded a few months of being human.