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Is Thunderbird compatible with OAuth? How do I ... ?

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Frontier Communications says Mozilla Thunderbird uses a lower security sign-in. They want me to use an email client that supports OAuth. What is OAuth? Can I use it with Thunderbird? If yes, how do I configure TBird to support OAuth? At present I use TBird with POP3 protocol, and it has been entirely satisfactory. Thanks, y'all.

Frontier Communications says Mozilla Thunderbird uses a lower security sign-in. They want me to use an email client that supports OAuth. What is OAuth? Can I use it with Thunderbird? If yes, how do I configure TBird to support OAuth? At present I use TBird with POP3 protocol, and it has been entirely satisfactory. Thanks, y'all.

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TB currently supports OAuth2 authentication only for gmail accounts, but according to Frontier, you can still use TB if you create an app password and enter it in TB.

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AT&T is switching to OAuth. When will TB support this?

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Hasn't AT&T switched to Yahoo for their email service? You can read about the progress in implementing OAuth for Yahoo accounts here:

https://bugzilla.mozilla.org/show_bug.cgi?id=1293958