How can Yahoo Mail be accessed by IMAP using OAuth or OAuth2 authentication

Question

According to developer.yahoo.com/mail/ and IMAP responses:

* OK [CAPABILITY IMAP4rev1 ID MOVE NAMESPACE X-ID-ACLID UIDPLUS LITERAL+ CHILDREN XAPPLEPUSHSERVIC         


        

Answer 1

As of august 2017, the only way to get the Email address is to use the scope called Profiles - Read/Write Public and Private. A very stupid choice of misleading options by Yahoo, since we don't want to "write" anything at all.

As a bonus headache, this will also return a list of all emails associated with the account, not just the main one. And there's no way to accurately identify which is the real one - the primary=true field returned in the list cannot be trusted.