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Secure Mail Key

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My AT&T/Yahoo/Currently.com email has an OAuth secure mail key, which I previously set up and was working fine. My computer got fried so I'm trying to get Thunderbird on a new machine running Ubuntu 24.04.1 LTS. But I can't figure out how to enter both my password and my secure mail key. How do I do configure the email to input the secure mail key? Do I need to create a new secure mail key for this machine? If I do, how do I get Thunderbird to recognize it?

My AT&T/Yahoo/Currently.com email has an OAuth secure mail key, which I previously set up and was working fine. My computer got fried so I'm trying to get Thunderbird on a new machine running Ubuntu 24.04.1 LTS. But I can't figure out how to enter both my password and my secure mail key. How do I do configure the email to input the secure mail key? Do I need to create a new secure mail key for this machine? If I do, how do I get Thunderbird to recognize it?

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A separate secure mail key must be created for each PC with the account. Use the key in place of the account password wherever you're asked for a 'password'.

https://www.att.com/support/article/dsl-high-speed/KM1010523/