On Wed, Mar 31, 2021 at 02:06:24PM +0200, Tobi wrote:
> We're seeing the same issue since 28th March. Looks like their new
> reputation system needs some fine tuning by a big hammer :-)
> Maybe they bought the same reputation system as 1&1 did not long ago.

They communicated as follows:

"Due to a heavy spam wave before and over the weekend around the 27th of March,
Bluewin Mail was forced to temporarily tighten up its policy for large senders.
As of today, these rules have been lifted and sending to Bluewin Mail should
not lead to rejects or defers anymore.

If you still experience issues sending to Bluewin Mail as of today [tuesday],
please open up another ticket on our support portal (support.bluewin.ch).  "

I concur there were more spams last week-end than usual, the catched-up list
was about twice as long, and 2 phishing attempts went through on my mail
server.


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