Am Donnerstag, den 27.08.2020, 09:02 +0200 schrieb Renaud Allard via mailop: > > On 8/27/20 8:24 AM, Felix Zielcke via mailop wrote: > > Am Mittwoch, den 26.08.2020, 21:06 +0200 schrieb ml+mailop--- via > > mailop: > > > > But it was enough to have the imprint visible for them just for > > > > the > > > > > > Sorry for a stupid question: What is "the imprint"? > > > Does that mean you have to operate a web server with an > > > "Impressum" > > > (I guess that's the German word?) if you want to send mail? > > > > > > > Yes I mean the german word "Impressum" > > > > T-Online (or Deutsche Telekom) require that somewhere on your > > domain is > > your address visible. Even if you don't have a web page at all. And > > just use the domain for sending mails. > > > > > > Does this mean that if you send a mail for "u...@domain.com" from > the > server "mail.example.com" with a correct FCrDNS, it will be denied > because domains don't match? > If yes, this is the most stupid idea ever, as this cannot work for > shared mail hosting. Or maybe they have done exceptions for things > like > o365 or gmail servers.
No. Deutsche Telekom uses a whitelist which IPs can send mails to @t- online.de accounts. They block every IP by default. So if you got some cloud vm with a new IP address, which never before sent mail to a @t-online.de address, mails will be rejected. You need to write their postmasters so it gets added to their whitelist. And for this process you need to have a small web page with your personal address listed if your server is run privately. _______________________________________________ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
