As far as I know this isn't a bug, it's a feature. For the past few years, T-Online have been moving to a system where they block all unknown IPs. How exactly they define that is not 100% clear, but it seems to be any IPs that haven't recently sent them email.
So if an IP hasn't sent them email in the recent past, it is automatically on their blacklist. By default. It's useless for ISPs (like us) to try and contact them to delist IPs, they want to hear directly from the admin of the (mail) server. They also have fairly strict requirements for delisting an IP. Kind regards Bastiaan Am 09.06.2020 um 20:36 schrieb Al Iverson <aiver...@wombatmail.com>: > Thanks. I sent them a note myself, for what little good it'll do right > now. > > I included the sending IPs mentioned here, just to help give them > examples. > > Anybody else who is bored, feel free to share your telnet test > results, It'll be good to have more data to share. > > Cheers, > Al Iverson _______________________________________________ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
