Untimely meditations

One man's thoughts, observations and rants

Welcome to the personal blog of Joop Beris. I blog about a wide variety of topics, ranging from atheism to information security and lots in between. I welcome feedback on my articles but there are some guidelines. Feel free to share articles you like by using the sharing buttons but please give me credit if you want to share something. Also, check out my privacy policy and other legalese.

Below you’ll find the most recent things I’ve written. Feel free to check them out, leave a comment and share them with others who might be interested.

Latest posts

  • Hardening Postfix

    Hardening Postfix

    While there are plenty of good (and not so good) anti-spam solutions available, most of them cost a bit of money in terms of purchasing and licensing fees. Even without a dedicated appliance, there are several ways you can harden the Postfix MTA against spam and other internet nasties. In this article, we’re going to…

  • Require TLS for certain domains in Postfix

    Require TLS for certain domains in Postfix

    Recently, I was asked if it was possible to require Transport Layer Security (TLS) for sending email for certain domains, through a specific relay. For added complexity, the list of domains would need to be updated daily. Of course it’s possible, I said. And yes, Postfix is up to the challenge. Here’s how to require…

  • Skies have cleared

    Skies have cleared

    It appears that we’re being spared any extreme weather here in the area. The evening skies are beginning to clear. Which is good.

  • I promise I’m working on a new post…

    I promise I’m working on a new post…

    But not right now because it’s just way too hot to think.

  • Discovery: Fish live beneath Antarctica

    Discovery: Fish live beneath Antarctica

    Scientists find translucent fish in a wedge of water hidden under 740 meters of ice, 850 kilometers from sunlight Source: Discovery: Fish Live beneath Antarctica An absolutely astonishing find from the web edition of Scientific American. In what has to be one of the most remote and extreme locations on Earth, scientists have not only…

  • Why I’m Not A Christian | Tim Stepping Out

    Why I’m Not A Christian | Tim Stepping Out

    I love reading about other people who have gone through a process of careful consideration, doubt, reasoning and then ultimately arrive at the conclusion that religion is inconsistent and therefore unbelievable. This is a long but well-reasoned post exploring the many inconsistencies in the Christian faith. Well worth a read! Source: Why I’m Not A…

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“There are two different kinds of people in the world: those who want to know, and those who want to believe.”

Friedrich Nietzsche

Philosopher