[Users] Weird certificate update popups

[mi]

Thanks Michael and Paul(s)  !

Tools -> TLS certificates shows different certs for two different ports. I assume this is sending versus receiving ?

As far as ai can see, no ports are configured explicitly.

I have configured just 'posteo.de' for both. Also 'Use TLS' and for sending, SMTP Auth.

So the conclusion is, they use different servers for sending / receiving ?

So what is happening here ... an update to new cert comes with receiving, then another with sending reverts it, and that repeats indefinitely ?

Is that it ?