https://us.community.samsung.com/t5/Samsung-Apps-and-Services/Troubles-with-syncing-Yahoo-ATT-email-accounts/m-p/1812207#M39398 I called AT&T customer service and got me back up. You might try login into email on a laptop to verify your account then go back to login in on your cell phone. Fri, 23 Apr 2021 17:18:06 GMT userINWLBUwR5N 2021-04-23T17:18:06Z