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Unable to log in at server

kerry.reeves53
kerry.reeves53
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I'm trying to add an ATT e-mail account to Thunderbird 91.4.1. I keep getting "Unable to log in at server". I know my username and password work as I have this mail account open in another tab hosted by Yahoo. What do I need to do? see picture attached

I'm trying to add an ATT e-mail account to Thunderbird 91.4.1. I keep getting "Unable to log in at server". I know my username and password work as I have this mail account open in another tab hosted by Yahoo. What do I need to do? see picture attached
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Chosen solution

I solved my own problem. I signed in to my ATT account and created a secure mail key. What this means is that I created a new username and password. I then used these new Username and Password in Thunderbird for my ATT e-mail. And it worked.

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kerry.reeves53
kerry.reeves53 Question owner
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Chosen Solution

I solved my own problem. I signed in to my ATT account and created a secure mail key. What this means is that I created a new username and password. I then used these new Username and Password in Thunderbird for my ATT e-mail. And it worked.