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I have 2 hotmail accounts that Thunderbird can access but my wife's one has not since set up.

I have had to set up new email account for my wife because her one she has used for 10 years will end after 6th January 2026 because email service provider is ceasing email business. I have an hotmail address that has worked seamlessly with Thunderbird for 10 years. If it is tried in Thunderbird to access the new account to check for new mail it either states not authorised or not connected. I have tried adjusting settings to be same as mine but not succeed in solving. I am at a loss. Maybe it was easier set up accounts 10 years ago?

Hello,

I'm having a problem moving messages from one folder to another. There's one message which will not move no matter what I do. I'd like to turn off QuickFolders so that I can determine whether it causes the problem. How do I turn QuickFolders off, and then when I'm done with my experiment, turn it back on again?

an year ago on 11/25/24, I have raised this same issue https://support.mozilla.org/en-US/questions/1475852#question-reply Another user https://support.mozilla.org/en-US/user/davidsk/ replied that it is a bug ! I still have the same problem !!

My hard disk is again almost full. And it is primarily Thunderbird bloated folders.

In the MAC hard-disk, size of the many of the folders stored in local directory, are much larger that the size on TB.

For reference, On TB, "_cc folder" is 2.0 GB On Mac Finder, "_cc folder" is 13.63 GB

I have right-click the folder and press "compact". The folder on TB reduces in size. But, the folder on the Mac harddrive does not reduce in size.

Thunderbird 115.4.1 (64-bit) on macOS 26.1 Server Type : POP Mail Server

Appreciate help to get this fixed.

Thanks Attached screenshots

Here it is...what now?

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Excellent analysis, indeed...

Date: Sat, Jan 10, 2026 at 2:54 PM Subject: Spot on To:

https://x.com/Dempaslotteborn/status/2009722

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pLEASE HELP IN VERY SIMPLE LANGUAGE .tHANKYOU SO MUCH. ATTACHMENTS TO EMAILS WON'T OPEN. ERROR MESSAGE1765572973244 addons.xpi WARN Checking C:\Program Files\Mozilla Thunderbird\distribution\extensions for addons Uncaught NS_ERROR_ILLEGAL_VALUE: Component returned failure code: 0x80070057 (NS_ERROR_ILLEGAL_VALUE) [nsIMsgMessageService.messageURIToMsgHdr]

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   openTab chrome://messenger/content/mailTabs.js:305
   _cloneTemplate chrome://messenger/content/mailTabs.js:52

aboutMessage.js:269 1765573033678 Toolkit.Telemetry WARN TelemetryStorage::_scanArchive - have seen this id before: 2790b244-a901-47db-9540-2583dbddbb49, overwrite: false

​

every time I enter some words for a search the system blocks access with an "I'm Not A Robot" process. while I always get past this it is annoying and has only started happening in the last few days.

Ich habe Thunderbird auf meinem MacBook Air von Anfang 2015 geladen auf dem MacOS Monterrey läuft. Sobald ich einen eMail Account einrichten möchte stürzt Thunderbird ab. Was muss ich tun, um diese Abstürze zu vermeiden?

My profile did previously work with news.eternal-september.org, although I very rarely used NNTP. The last active use might have been as long as July or August 2023.

A few days ago I added news.gmane.io, it did not appear in the sidebar.

news.eternal-september.org:

• was originally in the sidebar, and responsive
• is not in the sidebar after removing then re-adding the account.

Can anyone reproduce this issue?

Environment

Thunderbird 140.0.1 (64-bit) on Kubuntu 25.10. Neither Flatpak nor Snap; my configured software sources include packages.mozilla.org/apt/ for deb.

/etc/apt/trusted.gpg.d/packages.mozilla.org.asc exists.

The profile was previously used on FreeBSD 15.0-CURRENT, if that's relevant.