On Thu, Aug 27, 2020 at 09:21:20AM +0200, Felix Zielcke via mailop wrote: [..] > 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.
Awesome, how many personell do they engage with this process? Will such a scheme ever scale? This looks like a method out of dispair... Thinking of if every other recipient around the internet is going to force sender to register this way... every postmaster group would drown by such a task. Johann _______________________________________________ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
