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Hi guys I do have various email address from hotmail and Gmail. After outlook did not synchronize all of my Hotmail mail accounts I wanted to switch to thunderbird.

Now I do have the following issue. I want to add a Gmail account into my thunderbird. After typing in email address and password I am being redirected to Google.. I click on further and then I see a white page and the website is not loading at all. Once i go back to thunderbird it says login not possible with OAuth. Whatever this means. How can I solve this?

I have a comcast.net account but I use the Thunderbird app. How much trouble am I going to have moving to the Yahoo.mail for COMCAST? Will I have any extra steps that I will have to do. I am very apprehensive about this move.

Today I agreed to the update of Thunderbird. After the update all my data have been distroyed - no calender data have been shown nor my previouse emails nor my structure of emails worked as ususal. I safed a backup file (zif) from another PC to an external drive. Now it is not possible to import this file because the zip is to big and I get the order to unzip first. If I do this I get a long list of errors and nothing works. Please tell me how to solve the problem! Ralf

I believe that version 145.0, newly installed on the 9th December, 2025 was showing server folders correctly; the server folder name matched the client folder name.

After upgrading to 146.0 on the 10th December, the server folder names for some folders are displaying with different client folder names.

The IMAP account has both "spam" and "junk" folders, Thunderbird is now displaying both as "Spam", you can only determine which folder is which by showing folder properties. It appears to users that there are two "Spam" folders now and not the two distinct folders with their own names.

Similar behaviour is happening for "Sent" and "Sent Messages" folders, both now display as "Sent".

These changes are confusing, the client sees two "Spam" folders and two "Sent" folders instead of the original proper server folder names.

Why has the display name for these folders changed?

How can I get TB to display the real underlying folder names?

I have been using Thunderbird for years for email accounts with Comcast (Xfinity), Yahoo, and gmail. Yesterday, I started having a problem with my Comcast accounts - when I sent a message, it went out, but I got an error message (attached) saying it couldn't save a copy to the Sent folder. Sending messages from my Yahoo account works fine. Sending messages from my gmail accounts, I get _two_ copies in the Sent folder (this is new).

I tried restarting my PC, and that didn't help. I tried Troubleshoot Mode, but that didn't help. I tried reinstalling Thunderbird, and that seemed to fix it, but then it started again. I tried compacting the folders, and that seemed to fix it, but then it started again.

I can connect to the Comast/Xfinity server fine, and things work. If I send an email from the server, a copy goes in the Sent file, and it then shows up in the Sent folder on my desktop. But emails that I send from the desktop don't show up in the Sent folder.

I am using a Dell XPS8950 with Windows 11.

Thank you for your help.

I was working on my email accounts when the messages in the inbox of one of my email accounts disappeared. The message count on the top left of my inbox display says 0.

How do I get them to show up again.  I am using Thunderbird on Mac OS 15.6.1

Hi everyone - and big thanks in advance for considering my request: I have/ had windows 11 on my old machine and windows 11 on my new machine; because my 'old computer' is not running anymore at all (liquid damage), I can no longer start Thunderbird and follow the 'export tool function' (https://support.mozilla.org/en-US/kb/thunderbird-export) and thus can only do the manual transfer (https://support.mozilla.org/en-US/kb/moving-thunderbird-data-to-a-new-computer); I didn't think that I would need to go through the export tool steps when I saved the Thunderbird profile folder regularly as backup on the cloud; yet when I started Thunderbird on my new machine following the above steps by moving the Thunderbird profile folder manually, the result is that - although Thunderbird is 'running' and the mailbox is functioning properly - the key folders are empty (i.e. the sub-folder structure is completely lost, in fact there are no individual emails at all); the issue seems to be that the size of the Thunderbird profile folder is too large (the "Profiles" folder has a size of 20.5 GB) for doing this transfer via copy & paste of the Thunderbird profile folder from the cloud (I also tried USB) to the new machine; I understand that the size issue via the manual transfer could be 'overcome' just by starting Thunderbird on the 'old machine' and following the above steps explained under mozilla support; yet that's no longer an option; what could I do please?

I am using 140.6.0esr (64-bit) and Windows 10. My Inbox disappeared. I was in it with no problems. Then I noticed two problems. I couldn't open new emails. It said connecting to server or loading content but email was blank. Also when I sent an email it could not copy to my sent folder due to network or file access errors. I could open and read all the other emails in my Inbox, just not three new ones. So I selected Inbox properties and repair. After the repair, my inbox is completely empty. It had thousands of messages. When I do a search for common emails I know were in my inbox, it only shows emails from subfolders. When I go to Inbox properties, it says number of messages: 0

Is there any chance I could talk with someone? Or that someone would call me? I'm not experienced in Thunderbird or email settings. And I don't like having to do it online. Richard Higgins Concord Mass

Running Thunderbird 140.5.0esr

This has been happening for a few weeks now somewhat randomly. The folders under Mail for one of my accounts keep moving around and are not in alphabetical order anymore. Most folders are OK, but a few either jump to the top of bottom of the list. I can manually drag them back, only for different folders to do it the next time.

The folders in questions are 2 levels down from Mail.

1) I need help in correcting the problem of why I am unable to send an email to someone and also 2) why all my emails this morning are going to ecurtis@neb-sandhills.net, which is the same consolidated website, and nothing coming into ecurtis@nebnet.net

Steps to reproduce the problems:

Perform a Global Search (ctrl + K). Search for any string. Just make sure there is at least one search result. > Click "Show results as list". > Right-click on the search result in the Message List Pane. (Please see the footnote.) > The pop-up context menu has two problems:

(1) There are redundant dividers. (Please see the first attached image.)

(2) Hover the mouse over "Tag". The pop-up submenu is incomplete. The menu includes "New Tag" and "Manage Tags". However, "Remove All Tags", "Important", "Work", "Personal", "To Do" and "Later" are missing. (Please see the second attached image.)

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These problems (redundant dividers and incomplete submenu) also occur in Troubleshoot Mode.

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These problems only occur after using Global Search and clicking "Show results as list".

If I right-click a message in the Message List Pane of a regular folder (such as the "Inbox" folder or "Templates" folder), the pop-up context menu displays correctly: There are no redundant dividers, and the submenu of "Tag" is complete. (Please see the third attached image.)

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Operating system: Windows 10.

Versions of Thunderbird: 140.3.1esr and 140.6.0esr. I was using 140.3.1esr, and currently I am using 140.6.0esr. Both versions have the same problems.

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Footnote: When I right-click on the search result in the Message List Pane, the following error messages display in the Error Console (please see the fourth attached image):

Uncaught NS_ERROR_FAILURE: Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIMsgDBView.getThreadContainingIndex]        mailCommon.js:647
    isCommandEnabled chrome://messenger/content/mailCommon.js:647
    fillMailContextMenu chrome://messenger/content/mailContext.js:340
    onPopupShowing chrome://messenger/content/mailContext.js:146
    handleEvent chrome://messenger/content/mailContext.js:133
    _onContextMenu chrome://messenger/content/about3Pane.js:5235
    handleEvent chrome://messenger/content/about3Pane.js:4758
    init chrome://messenger/content/about3Pane.js:4712
    async* chrome://messenger/content/about3Pane.js:170
    async* chrome://messenger/content/about3Pane.js:139

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The fifth attached image shows mailCommon.js:647.

Hello,

I accept Teams events over the email, but cannot join them because the Join Meeting hyperlink is removed in the event's description. When I try to edit the event's description manually, the Edit option in the event's context menu (right click) is grayed out as can be seen in the attached picture. I also did not find any other way to change the event's description to insert the Teams meeting URL.

How do I fully edit events, including description and event dates? I need to have calendar events based on Teams meeting invitations work out-of-the-box. How do I achieve this?

Note: Exporting an individual calendar event would also help me solve this problem, but I don't think such a feature exists. If there would be, I would have exported the broken event, correct it manually, delete the old one from Thunderbird, open the event with Thunderbird and then add back the corrected version.

Thank you, Razvan Chisa

This version is very slow when opened ... it seaches through for various emails (gmail and Outlook) and snags on something called 'Checking Mail Server Capabilities'. Other issues include a slow copy to the Send folder once an email has been sent. I am not a technical person, been using TBird for many years and until now have really enjoyed its capabilities

Is there a known related issue? Overall the performance is very poor ... I use a series 7 processor and have WiFi speeds in excess of 100 MB.

Thanks Ron

My email (bnmalm@att.net) was associated with the Name "Christmas family." Now, when I send an email from bnmalm@att.net it displays "Christmas family" instead of "Bruce Malm" as it should. I cannot fix this.

When I click on an email, instead of just showing the email, it sets up a Reply screen showing From me and To Me. At the bottom there is an alert: "A unique identity matching the From address was not found. The message will be sent using the current From field and settings from identity......" (lists my email user name and address). Im not clicking Reply, I'm just double clicking the message to Read it.

Running Sequoia 15.7.2 on MacBook Air. It just started today. I have turned it off and on, no change.

I want Thunderbird to stop marking everything I delete as having been read. The way it works now, if I accidentally delete mail that I haven't read yet it's much more difficult to find it when everything is marked read even when it wasn't. I searched everywhere and haven't come up with a solution for this. It was reported as a bug years ago and was never fixed.

No longer a Spectrum cable user. Been using Firefox/Tbird for years. Will I still be able to use existing (charter.net/Spectrum) email address via Tbird?