This is the info from my email provider. Shouldnt be that hard. But i cant get it working.
https://support.syse.eu/hc/no/articles/200663632-Serverinformasjon-for-oppsett-a...
So I ran that through Google Translate and think I know the problem sadly.
It looks like they only support STARTTLS over the normal IMAP/SMTP ports where I don’t support STARTTLS at this time.
I expect a direct TLS port such as the 465/993 that require TLS. So sadly looks like until I get to implementing STARTTLS it won’t work with your provider.