Freron MailMate

Hello,

I am trying to add a new account, but the app won't deliver the mail to the server. The settings are all correct and working on other devices and apps.

First thing I noticed is, that my server is displayed "mailboxname%40accountname.servername.SLD.TLD@servername.SLD.TLD". It should be: "mailboxname@accountname.servername.SLD.TLD"

The activity viewer shows this:

16:13:10 Error: Connection error (Operation timed out).
16:13:10 Error code: 2
16:13:10 Failed action (0). Reset observed read/write timeouts: 8/8

16:13:10 Handling reply
16:13:10 Sending request (87)
16:13:10 Handling request
16:13:10 Clearing connection to brewington.uberspace.de
16:13:11 Ready to run action (retry count: 1)
16:13:11 Clearing connection to brewington.uberspace.de
16:13:11 Trying to connect to brewington.uberspace.de on port 587 (CFNetwork) with STARTTLS (required)
16:13:11 Resolved hostname (brewington.uberspace.de).
16:13:19 Error: Connection error (Operation timed out).
16:13:19 Error code: 2
16:13:19 Failed action (0). Reset observed read/write timeouts: 8/8

16:13:19 Handling reply
16:13:19 Sending request (78)
16:13:19 Handling request
16:13:19 Clearing connection to brewington.uberspace.de
16:13:21 Ready to run action (retry count: 2)
16:13:21 Clearing connection to brewington.uberspace.de
16:13:21 Trying to connect to brewington.uberspace.de on port 587 (CFNetwork) without STARTTLS (required)
16:13:21 Resolved hostname (brewington.uberspace.de).
16:13:21 Prepare secure connection...

How can I fix this? I got no coding skills at all!

Best regards
Sebastian