Thunderbird Community Forum

I have used Thunderbird for many years and and have loved it. However, recently my "Local Folders Inbox" have been extremely slow (deleting emails, reviewing an email, etc.). I have tried every suggestion that I have found without any change: reducing emails in the folder (down to about 75 remaining), compacting and repairing the folder, deleting and rebuilding all of the msf files and global database, disabling all addons, empty trash and junk, clear the cache, disable hardware acceleration, exclusion in antivirus, etc. It has become very frustrating. Any suggestions would be greatly appreciated.

When i minimize, it starts "eating" ram the computer crashed when it consumed 59GB of ram.. suspect memory leak.. One solution is turning it off after checked for mail...But i kinda want it minimized so i don't have to check by starting it every now and then..

I have just upgraded to Thunderbird 102.15.1 on my laptop and have a problem with right-click menus on folder names.

The menu appears for a brief instant and then disappears. If I move the mouse cursor slightly then it is redrawn and behaves normally.

Is this a known problem, i.e. requiring a further upgrade?

While checking mail in my inbox, I opened, then deleted a message (message 1). As has been happening lately, there was a significant pause between my hitting delete and the mesage going away. Then I opened another message (message 2), and I found that it had the header for message 2 displayed in the inbox, but showed the text of message 1 when opened. Scrambled messages and headers could be a big problem.

I logged onto the mail server (gmail) directly. It showed me message 2 with the correct header, and message 1 was in trash.

To fix the problem, I deleted message 2 on the server, and waited for it to vanish from the headers in my Thunderbird inbox. Then, I copied it back from trash on the server. After it downloaded to Thunderbird, everything was fine, but I wanted to alert you to the issue. Something evidently can go awry on TB's end to scramble headers and messages, and that is scary.

Running TB 147.0.1 with gmail(imap) as the mail server. I have posted twice in the past week about issues with gmail, and I am suspecting something going on at that end. My TB installation is brand new since then; the problems with logging on and staying connected that I reported only went away when I removed .esr, rebooted, and did a clean install of TB.

Please advise if this is a known problem, and if there are settings I can tweak to prevent recurrence.

A bug perhaps:- If I highlight various messages at once (I use shift and arrow) and then I press delete. When i subsequently navigate to any other message I can't read it, instead I see this message until I quit and reload Thunderbird: We're sorry, but we can't display this conversation, because the messages have been moved or deleted. Has anyone else noticed this and, better still, do you know how to work around it. I'm using Unified Folders by the way, in case that's relevant.

Hi I was using TB 142 without problems. When upgrading to 143 ou 144.B4 I have problems sending mails to all users after some times. Usually the first mails are sent immediatly but after around 10 mails, I have very slow response (varies from 5 sec to more than 1 minute and sometimes timeout). Usually quitting TB solves the problem but this is very annoying. I went back to 140LTS and sems to have no longer this problem. This was tested on many diffrent networks. I am running under Fedora release 42

Thanks

Thunderbird 140.7.0esr (aarch64) on macOS26.02

For several days now, Thunderbird has been responding extremely slowly to mouse movements or clicks. This leads to undesirable results because emails are suddenly deleted that should not be deleted (due to forced double clicks). Or folders are not opened, or the wrong folders are opened.

The last change was updating Thunderbird. Is this a known bug?

I have been using thunderbird for a few years now on win 10. Just had to buy a new win 11 system and successfully installed it. transferred my emails, folders and contacts and all seemed to work fine. Now I notice that once I leave it for a few mins, it is unresponsive with just a blue circle where the curser should be. I close it and re open and all is fine again for a few mins. I have tried turning off my antivirus software and disconnecting from the internet but still the same fault. Any ideas please?

I was happily using TB 78.14.0 on Mac OS 10.9.5 and I switched to using TB 140.6 on Mac OS 12.7.4, and it's now unusably slow. I've tried: troubleshoot mode with add-ons off; compacting folders; removing and renewing msf files; emptying junk and trash. Is there anything else, or is this just a failure or incompatibility of the app? I can't see that there's any antivirus app that might be interfering. Can something go wrong when you export the files from one TB into another? I would be grateful for any suggestions. Tim

Imagine having more than 30 Accounts to be added on a single profile my concern is how will Thunderbird handles file size if it's using one file (MBOX) and if the file has no solution, can I create files and keep mails on them until they reach max size?

I have two installations of Thunderbird on two different computers 2 different locations, both are new installations. Both are on Windows 11. The one at home, works perfect, the one in my second home too except the unified toolbar is unresponsive, whatever I click there it doesn't respond, The X doesn't close the program, the - doesn't minimize anything, just nothing happens, any advise?

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?

Thunderbird just updated to 144.0.1 (64-bit), and now I see a blank area where message list used to be. This true for all accounts and all folders.

I used to see this issue temporarily after compacting folders, but usually (but not always) went away and messages showed up. Sometimes I had to close and restart TB. Now even that wont bring up the lists. I'm dead in the water. And, yes, I did reboot my computer as well. Screenshot of this state attached.

Thanks for any help--it's urgent. Bert

Thunderbird performs a compaction. When it is finished the blue progress line is still showing on the bottom right hand side of the window.

You can select any folder and any view condition (read, all, tags etc) and no emails are shown anywhere.

• Restarting Thunderbird fixes the problem with no errors.
• This has happened a lot of times now and is consistent.
• If you force a compaction the problem does not occur.

Update: Usually, in frustration, I restart Thunderbird to fix the problem. This time, whilst typing this forum question, the problem resolved itself. I guess about ten minutes elapsed before the application righted itself. I will watch for the next incident and see what other information can be observed.

I can't add any email accounts in ThunderBird. The window keeps loading. Trying to uninstall and reinstall didn't help. It doesn't work on other devices either.

I tried to install the mailbox on another computer and the email configurator opened—I managed to add one account in this window, but when I tried to add another one, it didn't work like it does on other devices.

Downloading the latest version 143.0.