Thanks for reporting this. I'm currently tackling some autodiscover and MAPI issues. I will make this known to the team and get it written down.

Hello,

I was not able to reproduce this behavior. Can you confirm in the System Administrator -> Settings -> Bindings -> Ports, that port 465 is present in your bindings section?

Also could you make sure your SMTP logs are set to detailed, can do this in System Administrator -> Manage -> Troubleshooting. Once this is done you can include a snippet of the log for the time frame you tested the behavior.

Thanks.

thank you Matt

you are right, there was no entry there, so I added them

now I am strugging with certificate, one information found it has to be base64 x509 .cer, another one shows .pfx

base64 .cer did not work yet, exporting let's enrypt cert by powershell as pfx not worked yet.

will try again in evening, now have to go for "real work" ;-)

thank you

before

now added