I cannot connect my Yandex.Mail account, neither with an app password nor directly as an IMAP/SMTP account, I always get “Authentication Error - Check your username and password. (IMAP)”.
GMail connected just fine, so it’s specifically an issue with Yandex.
- OS and Version: openSUSE Leap 15.1
- Mailspring Version: 1.7.8
(Originally posted by InterstellarDragon on GitHub.)