Yahoo updated its email API and seems to require specific third-party app authorization => https://developer.yahoo.com/apps/. We can also support standard IMAP/SMTP settings but users need to enable Allow access by less secure apps settings (not ideal as we'll get loads of people complaining they can't add their Yahoo account). There also seems to be some IMAP folder mapping, as you can see in the screenshot below, I have no star emails showing (I should have one).
Yahoo updated its email API and seems to require specific third-party app authorization => https://developer.yahoo.com/apps/. We can also support standard IMAP/SMTP settings but users need to enable Allow access by less secure apps settings (not ideal as we'll get loads of people complaining they can't add their Yahoo account). There also seems to be some IMAP folder mapping, as you can see in the screenshot below, I have no star emails showing (I should have one).