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.

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.

Democracy cannot succeed unless those who express their choice are prepared to choose wisely. The real safeguard of democracy, therefore, is education.

Well, after I had the heart attack, it was a very simple choice. What the doctor told me I did and I did it religiously. I ate nothing but lean turkey breast or chicken breast or a piece of fish that was very lean. I mean I stayed away from everything.

From now on it is only through a conscious choice and through a deliberate policy that humanity can survive.

We believe that the European Union is facing a truly historic choice.

If you're a sports fan you realize that when you meet somebody, like a girlfriend, they kind of have to root for your team. They don't have a choice.

We choose what attitudes we have right now. And it's a continuing choice.

To say that an artist sells out means that an artist is making a conscious choice to compromise his music, to to weaken his music for the sake of commercial gain.

We in this Congress have a choice. The American people have a right to exercise a choice on this issue, as to whether our men and women will continue to fight and die in a war based on deception and fantasy, or to start bringing the troops home.

The choice is between which mistake is easier to correct: underdoing it or overdoing it.

A man can't be too careful in the choice of his enemies.

We need to teach the next generation of children from day one that they are responsible for their lives. Mankind's greatest gift, also its greatest curse, is that we have free choice. We can make our choices built from love or from fear.

I don't know whether these people are going to find themselves, but as they live their lives they have no choice but to face up to the image others have of them. They're forced to look at themselves in a mirror, and they often manage to glimpse something of themselves.

You always do what you want to do. This is true with every act. You may say that you had to do something, or that you were forced to, but actually, whatever you do, you do by choice. Only you have the power to choose for yourself.

It will be of little avail to the people that the laws are made by men of their own choice if the laws be so voluminous that they cannot be read, or so incoherent that they cannot be understood.

Soap opera wouldn't be my first choice, but at this point in my life, I would consider a soap. It would allow me to act and still do other things with my life.

Where we have the choice between putting a dollar against those that are going to advance horizontal integration and those that are going to sustain current capability, we'd rather put them against the horizontal integration activity.

Man is made or unmade by himself. By the right choice he ascends. As a being of power, intelligence, and love, and the lord of his own thoughts, he holds the key to every situation.

At only 20 years old I got married. I was still a kid myself, but in those times, if you got someone pregnant, you had no choice but to get married. So I left school and the only thing I could do was sing.

And before our current legislature adjourns, we intend to become the first state of full and true choice by saying to every low and middle-income Hoosier family, if you think a non-government school is the right one for your child, you're as entitled to that option as any wealthy family; here's a voucher, go sign up.

It was never really my choice to be an action heroine.

This war of choice in Iraq is undermining the very fabric of American society.

Confronted with the choice, the American people would choose the policeman's truncheon over the anarchist's bomb.

There are plenty of lesbians in Hollywood, but they're not out. And that's their choice, but I can't do that, it's too important to me.