On Wed, 19 Oct 2022, Jaroslaw Rafa via mailop wrote:
Dnia 19.10.2022 o godz. 18:55:29 Kai 'wusel' Siering via mailop pisze:
It would be less of an issue if t-online.de would take care _not_ to send
to domains they don't take the replies from; but they happily sent emails
to any MX in the world (anything else would upset _their_ users), but then
eagerly reject the replies.
So, as they don't do it themselves, the other party has to do it, as I
already wrote in my previous email. Anybody who receives email from T-Online
but has experienced rejection when trying to send to them, should reject any
messages from T-Online as well, with the error message stating exactly that
"We reject messages from t-online.de because you reject messages from us".
If sender-verify-callback was still considered acceptable,
that would resolve the issue automatically and accurately.
However, I would want to give fair warning before rejecting mail from
innocent senders.
Pity I can't see a way use a temporary reject or greylisting to
get a message back to sending user but still delivering the message.
I suppose I could deliver the email but give a permanent reject
message saying that we believe the recipient will not be able to reply
to T-Online senders.
But of course, sending a clear and accurate reject or bounce message
to T-Online is no guarantee that it will reach the sender.
--
Andrew C. Aitchison Kendal, UK
and...@aitchison.me.uk
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