Allerdings, auf einem dritten, frisch eingerichteten Server Ubuntu 22.04 (Hetzner) bekomme ich:
curl -v --ipv6 smtp://mx1h1.comcast.net * Trying 2001:558:fd02:243f::2:25... * Connected to mx1h1.comcast.net (2001:558:fd02:243f::2) port 25 (#0) < 554 resimta-h1p-037530.sys.comcast.net resimta-h1p-037530.sys.comcast.net 2a01:4f9:c011:6a5b::1 Comcast requires that all mail servers must have a PTR record with a valid Reverse DNS entry. Currently your mail server does not fill that requirement. For more information, refer to: https://postmaster.comcast.net/smtp-error-codes.php#554 * Got unexpected smtp-server response: 554 * Closing connection 0 curl: (8) Got unexpected smtp-server response: 554 root@ubuntu-4gb-hel1-1:~# Grüße Christoph > Am 08.09.2023 um 11:07 schrieb Christoph Kukulies <[email protected]>: > > Habe jetzt ipv6 wieder eingeschaltet, bekomme aber den Fehler weiter: > > curl -v --ipv6 smtp://mx1h1.comcast.net <smtp://mx1h1.comcast.net> > * Rebuilt URL to: smtp://mx1h1.comcast.net/ <smtp://mx1h1.comcast.net/> > * Trying 2001:558:fd02:243f::2... > * TCP_NODELAY set > * Immediate connect fail for 2001:558:fd02:243f::2: Network is unreachable > * Closing connection 0 > curl: (7) Couldn't connect to server > > Und auch auf einem anderen Server (beide bei Hetzner) bekomme ich dies: > > > curl -v --ipv6 smtp://mx1h1.comcast.net <smtp://mx1h1.comcast.net> > * Rebuilt URL to: smtp://mx1h1.comcast.net/ <smtp://mx1h1.comcast.net/> > * Trying 2001:558:fd02:243f::2... > * TCP_NODELAY set > * Immediate connect fail for 2001:558:fd02:243f::2: Network is unreachable > * Closing connection 0 > curl: (7) Couldn't connect to server > > > >> Am 07.09.2023 um 03:05 schrieb Alex <[email protected] >> <mailto:[email protected]>>: >> >> curl -v --ipv6 smtp://mx1h1.comcast.net <smtp://mx1h1.comcast.net> > Grüße > Christoph >
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