Hi,
Am 19.10.22 um 14:28 schrieb Bernardo Reino via mailop:
On 2022-10-19 13:33, Heiko Schlittermann via mailop wrote:
Hello,
I'm not sure how to complain and where. But I hope that here we can
start a discussion again. I'm quite upset.
Is this the new world?
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. …
The sending IP belongs to a rented host (rented from a major German
hoster). The answer he (the owner of that host) got was about like this:
[...]
I just tested and can confirm the same issue. My server is also hosted
@Hetzner.
The 554 occurs while connecting, so they really reject only based on the
IP/range, which is indeed quite brutal.
Hopefully this is just a misconfiguration (or a badly
interpreted/implemented policy).
sorry, I'm late to the party and didn't reach the end of the thread yet.
I run two mailservers within the Hetzner network and none is currently
being blocked according to opening a simple SMTP session.
So I don't think it's as simple as a network block.
I remember that someone from T-Online announced a policy earlier that
they are checking if the corresponding connecting hostname domain has a
webpage with an imprint or anything which would identify it as "somewhat
legit". I don't remember where I heard about that but I don't think I'm
dreaming.
If such a policy makes sense or not is a different story though.
Wolfgang
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