Blog
Notes on work we actually did.
Write-ups rather than announcements: what the problem was, what we tried, what it cost, and the parts that did not work. Nothing here is a product launch, and nothing names a client who has not asked to be named.
27 AUGUST 2026
Mail that arrives: everything internet.nl checks, and why
A mail server that sends is easy. A mail server whose mail is accepted, and cannot be forged, is a dozen records that have to agree with each other. Here is every one of them, on our own domains, and what each is actually for.
Open it at /blog/mail-that-arrives.
Published.
HOW TO FOLLOW IT
A feed, and nothing else
Posts appear when there is something worth writing down. There is no schedule to keep and nothing here counts who read what.
The feed at /feed.xml is an Atom feed, which any feed reader will take. It is the only way to follow this site, and it is deliberately the only way: a mailing list would mean holding your address, and a sign-up box would mean asking for it. A reader asks us for the file and tells us nothing.
If a feed reader is not how you work, write and say so, and we will tell you when something lands. That is the whole mechanism.