Yahoo seems to be making changes to their email settings. If you have an email account with yahoo and it doesn’t seem to get to its destination, take a look at their settings to verify you have it correct. below is a direct link to Yahoo.com’s mail setting page.
Good Lick!
https://help.yahoo.com/kb/mobile-mail/imap-server-settings-sln4075.html
Posted in: EMAIL - FAQ's