Thunderbird Community Forum

Comment, not a question. My now obsolete laptop ran Ubuntu 14 and its now 15 year old Thunderbird. Worked wonderfully well. My current laptop running Ubuntu 22 and Thunderbird 128.12.0 has driven me nuts since I got it. Slower than a snail loading. Confusing layout and function trying to group related messages into threads. I DO NOT LIKE IT.

I understand many of your customers might love the current Thunderbird for what they do with it. Can you somehow make available the older version of Thunderbird without all the fancy updates?

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?

Have two email accounts: Outlook and Gmail. They check and pull mail off the servers independently. I would prefer to only have to look in ONE account for my mail. I have chosen Outlook. I am having problems getting Thunderbird to push the emails in my Gmail folders to the corresponding Outlook folders. Is that because it can't be done? In settings for GMail account, under Copies and folders, I push: Sent messages > Sent on d*******1@outlook.com Archives folder > Archive on d*******1@outlook.com Drafts > Drafts folder on d*******1@outlook.com but they don't seem to be going there.

Is there a way to move messages in GMail TRASH to Outlook DELETED? As you can see, I'm not very aquainted with these things and am pretty confused. Any help appreciated.

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TB has now locked for me saying "Downloading message 158 of 289 in Inbox..." However, that is just the latest of TB behaving bizarrely over the last few days: filters not working, TB repeatedly re-downloading whole folders and now this is the last straw. Same sort of short pause then total lockup in troubleshoot mode too.

I have to have an Emailer I am not constantly fighting and debugging. My sense now is that the main database structures of my TB have somehow been corrupted.

I think this may go back to [https://support.mozilla.org/en-US/que.../1541906]. That problem transferred to a different folder when I changed my filter to redirect the routine messages to that different filter so it wasn't the folder, I didn't have time to sleuth it further and as it only affected those messages, which were not important, I ignored it and TB worked fine for other things. Then it even stopped happening with new ones of those messages but still if I opened one of the old ones, TB would lock. Again, I didn't really need the old ones so I ignored this.

Disconcertingly, Firefox, my main browser, has today become afflicted with something similar: launches, OK for about a minute, then locks, no different in troubleshoot. I will report that and come back and add the link here but perhaps some mix of Mozilla and KDE and or Ubuntu recent changes are behind this but the TB problem above was there on Ubuntu and has been brewing all week so a shared Firefox/TB issue is not the whole story.

I am not sure how much longer I can persist with TB given the frequency with which I have had really nasty problems with it in recent years. However, I feel a loyalty (I am a financial contributor) and I know that rebuilding my filters in another Emailer will take probably a full day (and I don't know what I'd swap to, using Kmail/Kontact for now so I'm not Emailless). So I would like to have one last go and my wish is to create a clean install and then I hope, rescue my address books and filters from the dying version and see if one last go can resuscitate things. So my questions, as I think the correct answers to this have varied a lot over recent years. I would like answers known to work for TB is 140.5.0esr (64 bit) on Kubuntu 25.10 if possible but Ubuntu 25.10 is obviously close.

• How do I best save and transfer the address books?
• Ditto all my filters (a lot!)

TIA, Chris

I'm new to Thunderbird. Today I installed and exported ALL my data from Outlook for Mac. I then used Olminator to successfully convert to eml and ics files for import to Thunderbird. The eml file import for my email worked great, as did my contacts. However, when I try importing the resulting ics file, I get this error:

If you’re seeing this message after snoozing or dismissing a reminder and this is for a calendar you do not want to add or edit events for, you can mark this calendar as read-only to avoid such experience in future. To do so, get to the calendar properties by right-clicking on this calendar in the list in the calendar or task view.

I've tried importing to the 'Home' calendar, and also creating a new calendar for the import but nothing works.

Any assistance would be greatly appreciated.

Thanks.

Have 2 email accounts that Thunderbird picks up: Outlook and GMail. Would like to push EVERYTHING downloaded to Outlook folders (from Outlook.live.com) to my GMail account folders. Seems like it should be easy, but I'm not having good success. Can anyone help or point me in the right direction?

After clicking on the message pop-up on the Thunderbird email client, the email appears blank,Open other windows to overwrite, then close other windows to resolve the issue. How can I view emails normally after clicking on the message pop-up

Hello During installation, Thunderbird Release does not give the option to choose a folder on a network drive, such a NAS network drive. So, how to install thunderbird Release on a network drive ? Thanks

I'm using the latest version (145) and I've setup my office 365 email account. I'm trying to setup my calendar account as well but when I enter location, username and password it says that my credentials were not accepted.

I assume this means that TB is using legacy un/pw authentication which is no longer supported instead of OATH2. There is, however, no option to select OATH2 in the calendar setup process (like there is for email).

Are office 365 calendars supported by TB 145?

I generally like thunderbird but when I got my win11 machine and installed it there seem to be some glitchy things.. the one I cant seem to work around it adding new contacts.. the screen does not ever add the contact to the book after I click on the add to link.. It also doesn't allow me to move/scroll around to find other links.. I have tried different screen settings, display resolutions, scaling.. nothing changes the way the add contact displays

Thunderbird version 140.5.0esr 32 bit now seems to dismiss reminders on its own -- i.e. without authorization/permission.

This makes the calendar/reminders feature worthless, at least to me.

Am I missing some setting so the old behavior can return? (Previously, each reminder would have to be dismissed or snoozed manually before it would vanish from the reminders window)

Thank you so much!

Hello there, i use CachyOS and use Thunderbird for my mails, but recently realized that i can login into matrix chat too so i decided to use it because its pretty simple, but when i want to verify my session, i got a problems and even passcode phrase wont help

Here the logs when i start verify device ``` prpl-matrix.matrix: error while handling verification event Buffer.concat is not a function prpl-matrix.matrix: error while handling verification event Buffer.concat is not a function prpl-matrix.matrix: error while handling verification event Buffer.concat is not a function console.error: "Set favicon for page https://addons.thunderbird.net/en-US/thunderbird/search/?q=matrix&appver=145.0&platform=Linux FAILED" [Exception... "Component returned failure code: 0x8000ffff (NS_ERROR_UNEXPECTED) [nsIFaviconService.setFaviconForPage]" nsresult: "0x8000ffff (NS_ERROR_UNEXPECTED)" location: "JS frame :: resource:///modules/MailUtils.sys.mjs :: setFaviconForPage :: line 1144" data: no] ```

On phone its continiously "loading" secure check but in fact trying 3 times and cancel verification cause of failture, what i should do with it?

Hi

I'm using Thunderbird 140.5 on a desktop Mac running Sequoia 15.7.2

In Local Folders, my subfolders have subfolders. In both levels of subfolders, Thunderbird has spontaneously started disordering both newly created subfolders, and folders which I move from one subfolder to another using right click 'Move To'

Up until ten days ago, all folders whether new or moved, were listed alphabetically. Now, day by day, the disordering is getting worse and as someone with ongoing conversations with hundreds of clients, it is becoming impossible to work when I have to give so much time to slowly scanning through every folder looking for the relevant subfolder.

I don't know why I can't update this version, but I tried installing the newest version available (145) and used the 'reset folder option' which did not work either.

Also, setting up a whole new account instead of upgrading my existing account is a colossal faff and I'd rather not have to!

Aside from manually reordering (also a colossal faff), can anyone suggest something I might be missing in stopping this happening?

Thunderbird says I'm on an esr channel, if that helps

Thanks

I have been using Thunderbird for many years, and it's been a while since I cleaned out my Inbox & Folders. I get about 1200 emails a week, so the clutter is extreme. Yet it is still stable, and now I am waiting to see at what level it falls over. Currently I have 84,544 emails in my Inbox, 131,597 in the Junk Folder,33,718 in Archives, 13,388 in another Inbox, and a whole heap which get deleted when I compact the system.

I reckon compacting it has got rid of another 200,000 or so this year.

I am very impressed, well done guys.

[edited email from public support forum]

How do I stop Thunderbird 115.10.1 closing tabs by itself? Previous version (I don't know what previous version I was running before the inadvertent forced update to 115.10.1) would leave tabs open until I manually closed a selected tab. How do I get 115.10.1 to perform the same way?