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A search showed that others have experienced this same error message, but as far as I can tell, they all were unable to access their email. These messages began appearing about a month ago. They pop up in Troubleshooting Mode. They did not in Windows Safe Mode. AVG and ZoneAlarm are not the culprits.

This just started 4 or 5 days ago ( 2026.1.23 ish). I did not update TB nor make any changes to the account in question (that I'm aware of). The errors show up every few minutes, with a 'beep' sound and notification pop-up showing up each time - is very annoying.

I was running v145 when it started. I saw there was an update to 147 and installed that; same issue. I restarted TB into Troubleshooting mode and am still getting the error.

This is running on MacOS 15.7.3. Hardware is MacMini (2024) with Apple M4 chip.

Generally I still seem able to received & send emails.

I opened Activity Manager and Error Console. Error console doesn't seem to have much (using 'Multiprocess', with Errors, Warnings, Logs, Debug enabled). Activity manager shows things such as:

<my account name>

   Connection to server outlook.office365.com was interrupted.    09:49
   Failed to connect to server outlook.office365.com.    09:52
   Authentication failure while connecting to server outlook.office365.com.    09:58
   Authentication failure while connecting to server outlook.office365.com.    10:03
   Connection to server outlook.office365.com was interrupted.    10:10
   Connection to server outlook.office365.com was interrupted.    10:14
   Connection to server outlook.office365.com was interrupted.    10:20

There was an error or log entry that I was able to find a few days ago that made me think it was Calendar related, but now I'm not finding that message.

I have two accounts hooked to thunderbird, my work account that uses google workspace and my personal gmail account. Today, my work account went totally crazy, and it's loading emails in my inbox at a snails pace. Meanwhile, my personal gmail account loads fine. I did literally everything. I deleted and restored the accounts, then I deleted the Thunderbird app and all the library folders on my mac that had thunderbird (maybe I missed some?) Then I reinstalled Thunderbird and connected everything again. Same result. Personal Gmail imap works great. Work gmail with google workspace is incredibly slow and won't load in my inbox.

Before reinstalling i did everything, cleared cache, compacted folders, changed to not have messages stored locally. What could I be doing? Is google workspace imap having trouble?

I installed the latest Thunderbird version last week, is this a version update problem? After a full reinstall of everything, I'm totally confused now. I've gone through my settings 10 times and spent 8 hours on this today. I used chatgpt to guide me and try different things. I'm stumped, please help. I'm a donor that supports Thunderbird!!! I've used it since 2008. 147.0.1 (aarch64) Release notes