Links 2026-06-05

looking for positive takes on social media and the web…

Links 2026-05-19

on the decline of the open web and its communities…

Addendum: these links are not intended to be current and up to date, but this weeks Google I/O really belongs into this list

Links 2026-05-14

Some links on speaking, presentations, and documentation …

Links 2023-08-02

On microservices and containers …

Links 2023-07-06

On Linux and WSL …

Links 2023-03-30

Some older texts, all about blockchains …

Publish and Update a PGP Key

I still keep a rather old PGP key around, and I have extended its lifetime by changing its expiry date. Something I would not recommend, because everyone with an old copy of the key in their keyring gets an “expired” warning or error.

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SMTP TLS Reporting, policy viewer

Screenshot of viewer webpage

For an easy way to lookup a domain’s SMTP TLS Reporting Policy try my nice MTA-STS Policy Viewer.

After writing the first notes on SMTP TLS Reporting I thought it would be nice to see all setting on one page, without using multiple tools and lookups for DNS and HTTPS data. The first iteration was a shell script, and the second iteration was a Python function. With some more fiddling I set it up as a Google Cloud Function, with a simple web frontend.