> On February 20th 2024, the Hague Appellate court instructed dmarcian to block dmarcian.com visitors who originate from Dutch Internet Protocol addresses.
Apparently they had some trademark dispute with their local representative. The story on their website seems to be missing some key details to understand the whole picture.
the free version of https://eu.dmarcian.com (which is great btw, but costs a bit out of my budget) is good, too
this is good too https://www.20i.com/blog/dkim-demystified/