-Made custom domain through cloudfare, lets call it 'solv@xdomain.com' , fully paid for and working -Registered it through iCloud mail on my iPhone and mangaed to get it working - Decide I would like Thunderbird client as main client so download - I follow steps of generating app-specific password for thunderbird, after entering my name and email 'solv@xdomain.com' correctly. Then I generated password through iCloud for non apple app, pasted it in and tried to log in - Server error, something wrong with password etc.

I have double checked everything and even re-installed thunderbird but it still comes with a server error. What can I do to use my own email address with thunderbird? Thanks solv