Hi, I remember writing to TOL on behalf of a .net organisation. And request they whitelist the new IP of their server. That worked.
The address should be in your logfile with the reject. Did you use that or some other channel to talk to them? So many companies ignore basic things like abuses. Or in this case invent their own whitelist. I bet nothing of all this gets them on a RFC-ignorant style list, where they belong IMO. Greets, Ludi -----Ursprüngliche Nachricht----- Von: owner-postfix-us...@postfix.org <owner-postfix-us...@postfix.org> Im Auftrag von Henry R Gesendet: Mittwoch, 30. November 2022 03:09 An: postfix-users@postfix.org Betreff: how to deal with t-online's blocking Hello, My mailserver once had some issues on sending messages to different providers. I have contacted the provders and most of them were kind enough to resolve the blocking issue. Thanks for them (ATT, GMX, 1and1 etc). But t-online.de keep blocking me. I have contacted them twice and got the same answer: We only allow evidently commercial or similar operators to connect to our mailservers. So, as a private user please use an SMTP relay or e-mail gateway of your hoster or ISP, that you can use as part of your contract with them. Their support will surely help you to configure your system accordingly. That's so strange policy to permit only commercial company to send messages to them. But there are many small companies/org who have their own mailservers, which can't send messages to t-online directly. How do you think of this behavior? Thanks.
