Yonke imikhiqizo Community Forum

I have been having much trouble with Thunderbird. The latest problem is with the Sent folder. When I try to Compact Folders I get the message "The folder 'Sent on Local' could not be compacted because writing to folder failed. Verify that you have enough disk space, and that you have write privileges to the file system, then try again."

I have plenty of disk space and have Full Control. I tried creating a temporary folder and moving all the Sent messages to it, so that Sent had zero messages. I still got the same message. The file listing showed Sent to have a size of 182 MB even though it didn't contain any messages. I've tried deleting sent.msf to force Thunderbird to recreate the index - didn't work. I tried using Repair Folder. That worked, but when I tried Compacting Folders again it found another folder with the same problem. I fixed that one and then it said the Sent folder was bad once again. I'm going around in circles!

I've deleted and recreated scores of .msf files for various reasons, trying to get Thunderbird to work without errors, but as soon as I get one problem fixed, another one crops up. I'd conclude that it's my computer, except that I'm not having any problems with other programs.

Any thoughts on this particular problem or Thunderbird problems in general? Thanks.

I've been using Thunderbird for probably 10 years or more. My current version is 140.1.0esr (32-bit) - unsure when this was updated from previous version. My pc is a 64-bit pc so I'm unsure why I'm running the 32 bit version of Thunderbird.

Starting today, when I click on the New Message button, nothing happens except the button seems to register the mouse click with a slight change in appearance. Usually this would open up a blank email but I currently can't write a new email until this is resolved.

Turning off Anti-virus makes no difference. I've tried a PC restart also with no effect.

Any ideas what I can try please?

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?

Hello,

Every now and then Thunderbird pops up the notification in the screenshot. Can anyone tell me what it means and if I should do anything about it?

Alan.

Greetings!!

I started getting the most bizarre problem over the last couple of days from Thunderbird. Suddenly, for certain emails (not all of them), Thunderbird will start truncating the email. The email just stops loading partway through, and the email is not marked as read as it usually is. There is no progress bar at the bottom to indicate that the email is still loading. But, if I view the message source (via the View menu), the whole email is there. It typically happens with emails with either images or ones that fetch some sort of dynamic content.

I've repaired folders, rebuilt summary files, removed parent.lock, restored a backup of both program and message files from two days prior to the problem starting, reinstalled my current version of Thunderbird, rebooted the computer by holding the power button down for a minute, tried Thunderbird Troubleshoot mode, tried Windows 10 Safe Mode, disabled all add-ons, cleared my cache (under disk space), cleared my startup cache, created a new profile, compacted folders, and (temporarily) gave it a free pass through my Firewall. Nothing had any effect.

The Thunderbird Error console doesn't show anything in particular different between emails that load fully and those that do not.

To say I am at my wit's end is an understatement. Is there some sort of simple solution I am totally missing, by any chance? Thank you for any assistance!!!

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?

Why Thunderdird now is so slow

Why you recommend to upgrade to ESR when the one that I had been using for years I don't trusted

I have Thunderbird: 128.10.1esr (64-bit)

Amparo

Hello, I am unable to see my email messages in the panel. I do see the number of emails that I have, but unable to open anything. Has something major happened with Thunderbird? The email function was working fine and the next morning, all of my messages in the panel disappeared.

I'd appreciate any immediate feedback. Thank you.

Hey there since a week when I brows with Firefox on Windows desktop the RAM uses jumped from around 60% spiked to 92-95% RAM and that changed just come a long a week ago. If change brows like Chrome different story, back down at 65. So you can also see a massive number on Firefox system running.

Question: Whats the reason for the change? What happend?

Best, Janosch

I am running Thunderbird 128 (any version) on a Surface Pro 9 running Windows 11. After sleep/hibernate or going into energy-saving mode, TB hangs for a period of minutes. Eventually it comes back, but it can take 5-10 minutes.

I do not have this problem with TB 115 on the same machine, or TB 128 on other machines (e.g. running Windows 10 or Ubuntu). TB 115 on the same machine can take a few seconds to come back (longer than on my other machines), but that s OK.

I have the same expereince whether or not I am troubleshoot mode. I have created a new profile with no add-ons (and less acounts) and I have the same problem. I was wondering if it is something to do with the fact that I have 8000 folders, and somehow TB is hanging while it checks all the folders. That account is a fastmail IMAP connection, but I have experienced similar on a backup Microsoft Exchange account (again an IMAP connection) with similar number of folders.

Any help would be appreciated.

I reported this to you by last Friday but I have received no response so far. After reporting to you, I tried all possible trouble tests and checks, then took following steps. 1 - I deleted my copy of Thunderbird from my PC 2 - I loaded a new copy of Thunderbird - all went well 3 - But situation remains, the program opens, reacts very slowly to commands but I can not get into any functions. Thunderbird does not show any emails, nor can I read older emails stored on my computer 4 - I ask you kindly for speedy help, my email function is fully down. Yours - Jarl Jaatinen - Finland

The last couple weeks any emails from a business only have red horizontal/vertical grid lines. If it says to view or track package it won't let me, do it. If I drag that email over to another folder it acts normal and if I drag it back to my in box it has the red lines. I've checked the emails in the server, they are normal. Also, there is yellow bar at the bottom of the attached email. It acts like a message I'm trying to send because the to is prefilled out with my email address. Weird Dell Inspiration 366B Ram 8GB 64-bit operating system Windows 10 V 22H2 Thunderbird 32-bit 128.9.0 release 3/18/2025

I've done EVERYTHING.

New install of latest version. edited profile to point to saved data on USB external drive DELETED every instance of lock files terminated task numerous times. rebooted 3 times...

What now???

I am having a problem with my thunderbird email client. There was an update to the program over night and now when I load thunderbird it is unable to show me the content of emails in any of the folders. I can see the emails in the list and all the folders are shown in the folder tree on the left. Howevr I am not able to access the content of the emails. My thunderbird profile folder is on a network share, this fileserver is a windows based machine. If I copy the profile to my local machine the profile works correctly and I am able to open emails and view the contents. It is only when my profile is on the network that I cannot view the contents of the emails. I ran thunderbird in safe mode and this does not resolve the situation. I have tried to repair the folders but this did not work. I deleted the .msf files but this also did not work. I ran the thunderbird debugger and then tried to access an email, the debugger stopped on the follwing exception: NS_ERROR_XPC_BAD_CONVERT_JS: Could not convert JavaScript argument arg 0 [nsITreeView.setTree]. What could be the problem with my emails?

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.

Whenever I have just 1 Window of Firefox and just 1 tab open, task manager ALWAYS shows 14. Why is this? I have refreshed Firefox and lost some of my settings, it did nothing. Have I been hacked and someone else is controlling my browser?

Screenshot shows one firefox with one tab and yet 14 next to it in Task Manager

Thunderbird keeps coming up with the message: The folder 'inbox on dveitch@202.215.17' could not be compacted because writing to folder failed.

There is plenty of disk space and compacting has been working fine until recently. Has a Thunderbird update changed something?

Just installed TB for Android on Samsung S24 Fe. Works fine but am unable to exit the application other than forcing phone back to home screen. Have installed on a Samsung tablet and the back button seems to be working OK. Anyone know of any issues with this phone and TB?

I am running TB. Using the Windows Performance Monitor, the usage jumps from 30% to 90% and then 100% once TB is open. I am running 1.128.14.0esr (64-bit). I have the before and after screenshots of the CPU, see attached. Is this known behaviour?

I tried the steps at https://support.mozilla.org/en-US/kb/profiling-thunderbird-performance to record. The Multiprocess Browser Toolbox window hung the 2nd time (the first time, nothing happened after Capture recording), then I left it 20 minutes and came back to the message that we were unable to connect to the browser within 30 seconds. It eventually finished, painful - htpps://share.firefox.dev/41tZ5xy