Mail problem solved
Weird: I changed ISP quite a few months ago, and I used their SMTP-server ever since, without a problem – until last weekend:Their server refused relaying…Their suggetsion: use the smtp server at you new ISP. Duh. I could have guessed – but I’ve asked for a postbox, and seems to have never used it…And I had just one receipt for domain registration and DNS; where I would expect more….
That’s administrative, still to be handled, with some other things. But I chnaged the alternate gateway to the current ISP’s server, restarted SMTP and now mail works again.
What goes on behind the doors of the (private) data center