I am with ATT in Houston. Recently my neighborhood received fiber and I upgraded.
I tested Internet, phone, and TV. Did not think to test email. Somehow email broke. Thunderbird takes like 30 seconds to time out and I get an error message server returned an error. If I use the browser (mail.yahoo.com) I get email. I even get test messages I sent to myself from Thunderbird. I have an email in mail.yahoo.com invalid device identified and blocked and ATT claims to have removed the block.
Exact message: Sending of password for user email@example.com did not succeed. Mail server inbound.att.net responded: Server error - Please try again later.
I installed the latest upgrade to Thunderbird.
Any thoughts on how to fix this?