Thunderbird v.128.1.1esr (64-bit) (up to date)
Windows 11 Pro v.23H2 OS Build 22631.4037
No VPN
Two days ago my Thunderbird installation stopped being able to access my … (مزید پڑھیں)
Thunderbird v.128.1.1esr (64-bit) (up to date)
Windows 11 Pro v.23H2 OS Build 22631.4037
No VPN
Two days ago my Thunderbird installation stopped being able to access my Gmail account. Everything was working fine up until then. Now I get a notice to allow Thunderbird to access Gmail, I click 'Allow' and it fails to authenticate. Collecting mail from my other non-Gmail accounts is unaffected and works fine.
I see these permission approvals are triggering email alerts to my backup Gmail account for this one re: "A new sign-in on Windows" and I am consistently clicking "Yes it was me'" with no effect. I have not done anything to block this activity, and I have no problem logging into this Gmail account from any web browser using the same credentials I am using with Thunderbird ... and which were already in place when this started happening 2 days ago.
I checked in Thunderbird Settings > Privacy & Security and cookies are being accepted, and I can see the cookies in the list.
I have tried deleting the saved (unchanged) password, removing the cookies, and even removing the account and setting it up again, with no joy.
When re-setting up the account this morning, the account creation does not complete and I am receiving this notice: "Unable to log in at server. Probably wrong configuration, username or password." (see attached screenshot)
The username and password were (a) unchanged from 3 days ago when this worked fine and (2) confirmed as I can log in to that Gmail account just fine with any web browser using the same credentials, even with incognito browser.
Thinking maybe the Thunderbird auto-detected configuration is incorrect, I changed the IMAP Connection Secutiry setting for the account from SSL/TLS to STARTTLS where it took about 2 minutes on the Checking Password stage and ultimately failed with the same error message.
TIA for any assistance with being able to use Thunderbird once again to work with this Gmail account.