Hi The Wanderer, > Hans, are you certain you composed those three messages the same way, > using the same interface of the same program, and sent them the same > way?
No, the first mail was created natively (= a new mail), the one with the "[SOLVED] in the subject was a reply to someones mail from the list and the last mail was also a reply this time of my of my own. It looks like replying to soemone (my normal behaviour) is causing this issue. And it looks like, that I am getting the SPAM tag, not you. Some minutes ago I informed megamailservers.eu of my problem and sent them the mail with the headers, i sent here, too. Hopefully I will get some response. The strange thing is,this issue suddenly apeared from nowhere. I have nothing changed here (except of upgrades). I am running debian bookworm and my mail client is kmail. But that should not be the problem. Best Hans