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Server Authentication

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  • Last reply by T3cH

KSI
KSI
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I cannot receive or send any emails. Server is not authenticating. This is a sudden fault. Thunderbird is updated to 128.0.1esr (64-bit). Opening Thunderbird shows message "Authentication failure while connecting to Thunderbird imap.gmail.com”.

What is the fix for this?

I cannot receive or send any emails. Server is not authenticating. This is a sudden fault. Thunderbird is updated to 128.0.1esr (64-bit). Opening Thunderbird shows message "Authentication failure while connecting to Thunderbird imap.gmail.com”. What is the fix for this?

All Replies (1)

T3cH
T3cH
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Hi KSI,

Make sure you allow cookies for accounts.google.com and Oauth2 is enabled on both IMAP and SMTP servers. It's detailed in the below article.

https://support.mozilla.org/en-US/kb/thunderbird-and-gmail#thunderbird:win10:tb115

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