On 19.10.22 14:25, Stefano Bagnara via mailop wrote:
On Wed, 19 Oct 2022 at 13:32, Heiko Schlittermann via mailop
<mailop@mailop.org> wrote:
A given mailhost (ran privately for smaller entities) can't send
messages to T-Online anymore.
554 IP=168.119.159.241 - A problem occurred. …
Do you get this error at the connection or after you transmitted the message?
$ telnet mx00.t-online.de 25
Trying 194.25.134.8...
Connected to mx00.t-online.de.
Escape character is '^]'.
554 IP=378.294.445.288 - A problem occurred. (Ask your postmaster for help or
to contact t...@rx.t-online.de to clarify.)
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