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We are facing issues with Thunderbird mail application.

Incoming emails are not being received in Thunderbird. Thunderbird is running very slowly and frequently becomes unresponsive. Sending and receiving emails is taking a long time. We have already restarted the application and system, but the issue still persists.

Kindly check the mail server settings and Thunderbird configuration from your end and advise on the necessary action to resolve this issue as soon as possible.

Your prompt support will be highly appreciated.

Hi all,

I've been using Thunderbird for eons but yesterday morning it started freezing up constantly.

It freezes up ("Thunderbird is not responding") every time new emails are received or any time I take any action while the Inbox folder is open. So, if I delete an email it freezes for a few minutes. If I do anything pretty much, it freezes up for a few minutes. Then it comes back and I can do another action, and it freezes again. This only seems to be happening when I have the Inbox open - if I go to other folders it seems to function normally.

Things I've tried without success: - Troubleshooting mode - Adding exceptions for my profile folders to Windows Defender - Compressing Inbox (and Trash and Junk) - Repairing the Inbox index

This doesn't appear to be a memory issue - right now, memory use for my entire system seems to be hovering at just over 50%. But Thunderbird is still freezing.

My Inbox folder is very large, but it's never been an issue before and nothing significant was added yesterday when it started failing.

Any suggestions appreciated!

Thanks

Hi!

I don't understand. Firefox is eating up memory again in the latest versions, and on top of that, it's the GPU on my PC.

4GB for the app and up to 8GB.

Are you mining Bitcoin on my machine?

What are you doing?

Not sure if if this is a settings issue. All good, except the Status Bar and progress bar do not show progress activity during prompted cleaning of all accounts, as before. I cannot tell if it's still working or not, or if I can close the program without crashing or corrupting something. I am guessing it's working as the HD light is busy. Eventually (some accounts are large) the status bar indicates it compacted to save ___MB. Version 152.0 on Windows 10, supported.

Every time I shut down my Windows 11 PC (25H2, x86-64), it gets stuck and states "This app is preventing shutdown", listing Thunderbird as the application that is the cause for the hold. If I don't react to this and force close Thunderbird at this point, my PC does not shut down. (Annoying if I hit "shut down" and walk away expecting the shutdown to complete.)

If I close Thunderbird before shutting down, Windows proceeds correctly.

How can I diagnose why Thunderbird seems to hold Windows active?

Dear Thunderbird-Team !

Please look here my Thunderbird is not accessible on my Laptop, because there is always the screen to support Thunderbird with a donation etc. .

What can I do that Thunderbird is working as usual ?! -

Thank you in advance. Frank Edgar

I am running Firefox in Windows 7 on a PC. When I start up Firefox, in WINDOWS Task Manager there appear between 20 and 30 instances of firefox.exe of different sizes in the Processes Window. I can End Process on most of them without shutting down Firefox or any of the other instances of firefox.exe. However if I shut down one listed with about 200,000K of Memory (Private Working Set), then Firefox shuts down and all other instances of Firefox disappear. If I open an new tab in Firefox, more instances of firefox.exe appear.

I have never seen this behavior before. I tried uninstalling and reinstalling Firefox, but the same behavior occurred. Is this normal behavior, or should I be concerned?

I have enclosed screen shots from the Task Manager. I also have a Dump File of a couple of the firefox.exe instances, including the large one, if that would be helpful.

Thank you.

Hi. I hope you can help me. I have already asked my husband for help and he has tried and failed. (And he's an IBM engineer).

I have been using Thunderbird for decades.

I have installed Thunderbird (V128.6.lesr) on my new Lenovo Yoga 9, Windows 11. It constantly hangs and is slow to load. It doesn't recognize my addresses when I use compose, even though my address books are installed. I have uninstalled, reinstalled, tried troubleshooting/safe mode multiple times. I have compacted. Emptied junk. Everything. I have copied my old settings into the new installation. Nothing works.

I think I need someone to just look at my Thunderbird set up. Someone a lot younger than I am who knows what he or she is doing.

Please help.

Dear Mozilla.

Yes, I'm using the dreaded Windows 10, I do understand it's at end-of-use, however this prob's been happening for ages. It's just got a little worse lately! (I've also got another hard drive with Windows 7 on it I swap the Windows 10 drive for sometimes. And we don't talk about the Windows XP hard drive with my music software on it. AARRRGGGHHH!!!! But the everyday drive with this problem is definitely Windows )

I don't use masses of extensions, just a VPN (which is there but not used a lot!) and is Proxy VeePN (that's its name, blame the designers, not me!) When I'm NOT using Firefox for a few moments, I hear the fans speed up, the hard drive spins like it's about to take off (old computer here!) The moment I touch the mouse, the fans all slump back to normal and the red 'HIGH USAGE' mark against Firefox vanishes back down to 'LOW'. Which makes it annoyingly difficult to analyze what's happening cos the moment I touch the mouse to find out what's happening, it stops happening!

Despite the above and its memory addiction - left to itself it munches memory like me with a crate of chocolate bars! - I do love Firefox best of all the browsers. I kinda know what causes the memory problem, by the way. I don't know all the techie terms but here's what's going on. Imagine you've got a house with an untidy kid in it. Every time one room gets too messy to use, you move into the next room. Eventually you run out of rooms. Then you restart the house back from day one, all the rooms are tidy again and you can use them all individually and happily - until Untidy Kid turns back up!

I'm on Firefox 148.0.2. If you've got any ideas about the CPU usage, I'm [email removed]@hotmail.com. It doesn't seem to matter what websites I've got in the browser, it just does this when I've got it parked in the background, it's like it's twiddling virtual thumbs through boredom cos it's not being used.

Yours respectfully,

Chris.

I'm not asking a question now; I already found the answer. I'm contributing an answer in case others run into the same problem I did. The archive function in Thunderbird was running painfully slowly. I remembered it as being fast, moving from local folders (from POP) to local archive folders quickly, but lately it had been slow, like seconds per message. And I had thousands of messages to deal with. This is on Windows 10 Pro.

The fix turns out to be in Settings -> Windows Security -> Virus and Threat Protections. It has an option "Cloud-delivered protection", which "Works best with automatic sample submission turned on". Now frankly that sounds like a major-league security hole to me, sending old private messages to Microsoft! Turning them both off fixed the problem. Now archive is entirely local and isn't held up by Windows mucking into the system and trying to make copies of private mail and send them to the mothership before moving them. I don't know how Windows "Threat protection" broke into the internal operation of T'bird but that was an easy fix once I found it, and the archive function is very fast, even moving thousands of messages at a time.

Hi, I have been forced to do my 2022 taxes and tried to search for my invoices, but it failed. So I followed advice to simply have thunderbird recreate the index.

However, its not working. I collected 15 email addresses over decades and are likely pushing thunderbird a bit, exposing limits on the way.

In this case, I presume (because I cannot really find logs for it) that the IMAP servers are not cooperating and the activity monitor gets stuck because of a request limit at googles IMAP server. We are talking about Gigabytes of mails some with larger attachments in the Sent folder.

What I am asking is for a bit of insight how the indexer could be tricked into finalizing its job. I might not live long enough to see the end of it otherwise ....

Is there a way to modify the timeouts maybe? Or maybe there is a way to download all the mails prior to the indexing, so it can work locally?

The system should be able to handle it (win11,ryzen9, 32GB, 2TB SSD)

Any suggestions please? Thank you for your input.

When I open up my Thunderbird to get emails I keep getting getting error code 0x80570015. I can't see attachments and cannot respond to emails. Also cannot delete emails. I Iooked it up to see how to fix it and they say to remove the "lightning" add on. When I go under tools and look for this add on, it is not there. In fact it doesn't seem that I have any add-ons. Something to do with the calendar which I don't even use. It says Thunderbird is up to date. Could you please give any advice how to fix it. Thanks, Matt

Hello:

My Windows Thunderbird has become unresponsive, taking forever to connect to my various accounts. I suspect the problem is with my GMail account--which is not my primary account--is causing the problem, but I am unable to un-sync GMail's All Mail folder.

I was able to get into troubleshooting mode, but TB was still unresponsive.

I have copied the profile in question to my Linux machine, with TB V140.4.0esr, to try to repair the profile, but the problem is recurring there as well.

Is there a way to manually edit the profile file(s) to remove the GMail account from Thunderbird?

Any insights would be much appreciated.

Thanks

DrP

Hi - I have a problem very similar to https://support.mozilla.org/en-US/questions/1493859?page=1 I think.

I am unlikely as technically savvy as user @iwright2 though.

I am running a MacBookPro 14.1.1, Thunderbird 129.7.1esr

Like the other user, this is no doubt due to my overstuffing of folders. I have, as a friend says, terrible computer hygiene.

I can see from the size of the empty inbox that there are many messages there. These messages all display in AllMail and outbox. These are all embarrassingly large.

I believe the problem stems from my searching on a string in one email's inbox and highlighting just these - they numbered n=60 I think, and I transferred them to an inbox on a different email account. They transferred slowly and after that, the entire first folder was empty.

This is a mac, running a lot of different gmail accounts all as IMAP.

Perhaps I need to restore some file, but I'm pretty nervous to do this. I will backup the computer first.

I'm not sure what else to tell about or investigate. Is there anyone who might be willing to help see me through trying to restore these emails to visibility. I tried someone's suggestion to change the display parameters, but that doesn't work. I must have messed things up in the transferring. I can also try repairing a disk as suggested in the other thread, though I'm not sure that's the root of the problem, I think the transfer amid way-too-big-files is.

Thanks - Huge Thanks!!! - if someone has a thought/suggestion as to where to start.

Using v128.14.0esr 32-bit with 6 accounts checked every time - and got this update just a few days ago, not sure what precious versions were - it says though that a v140.3.0esr is available, not sure why I got update v128 that is not the latest

I was used, for more than 12 years, to just start Thunderbird to check if any new emails, and then close it again if none. - was done in 2s

Now every checked account take like 2s and have to wait 12s to close TB again. - yes, you see three messages every account checked, maybe some want that

I would appreciate a setting to empty/check as fast as possible as before, or this new approach? - a simple checkbox, fast check or not

Or is there a way to revert to earlier versions to restore this? - or some registry or setting elsewhere to alter? It's very inconvenient with this serious delay each check feature?

Thanks for reading. Would love to hear how community feels about this too?

Two or three times now I have requested that a message be moved from my inbox to another folder and nothing seems to happen. No complaint happens nor does the message get moved. I tried both the right click / move and drag and drop and neither did anything.

Logging out and back in does not fix the problem but doing a restart does.

I checked the older tips, but the "Tools" link has no more caching settings or clearing cached content. Currently, I have 2 accounts and do not even dare to add my other two. Not sure. maybe Thunderbird is not built for that load?

Thanks for any tips.