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I've always experience occasional TB crashes. According to my log history there was 1 in July, 3 in Aug, 2 in Sep, 2 in Oct, and 6 in Nov. I never really paid attention since the reboot was quick. But now in December I am losing work and it is a major problem. I've had 30 crashes in Dec and 21 in the past week. I have only 3 add ons and they have not changed, and a Copernic connector. I disable the Copernic connector and it didn't help. I have the same 140.6 on my Surface Go with the same add ons, except for Copernic and it runs fine. On both PCs I use Malewarebytes and WinDef. I have put exclusions for them in their setups. Even with MBAM completely disabled I've still had crashes.

I cleared the Cache and no help. I've even had occasional crashes in Troubleshooting mode. Here are my last 5 crash IDs

bp-070bf941-4e8b-41a3-8b84-3e3440251224 bp-a936f7c2-9ee3-4c38-b304-dab830251224 bp-8be9cf9e-8f2f-49bb-95cf-47e780251224 bp-12f8fc2c-c505-40f0-8c67-44b730251224 bp-9013fb78-086c-4327-9de8-62db30251223

Interestingly I’m also experiencing crashes with Firefox, especially ChatGPT. I cleared the ChatGPT history and that helped but did not solve the problem. I cleared the Firefox cache and in troubleshoot mode still have issues.

Otherwise my win11 PC seems to be working fine. I’ve run chkdsk and all is ok. Also scannow is ok.

Is my next step a profile rebuild?

Currently my Thunderbird 'Sent' mailbox is only holding emails back to the beginning of 2025. However on previous PC's my Sent mail went farther back, but not I think to the beginning of when I bought the PC. I do backup my PC with some regularity but I am wondering whether there is a limit to how far back Thunderbird saves messages. I've been using Thunderbird for about 20 years and wonder whether I can retrieve some of my great emails :)

I deleted over 300,000 emails from my trash. It now tells me I have a couple thousand files left. however, before the massive delete, it said I was using 15 GB of storage. now, with only 2000 files left, it still says I have 15 GB used. I've tried compacting, but I get an error, saying I do not have enough memory to compact. How to I release all that memory that contains just ghost files?

hi I have a mail adress rodeo1958@gmx.fr on caramail all is working but if I add a mail account it does not succeed , : problem of identifier or password... what happen ? i have check the email and pass both are right. thanks for helping me ... marc

In Thunderbird, I am trying to create an email filter, however, the screen/window display will not show the "OK" button to allow the filter creation to be saved for usage. After several hours, I have tried all the resolution changes, "resizing" the screen/window, "window" stacking, cascading etc, - nothing works to lengthen the screen to show the "OK button. I have other filters created previously, that work, but editing with changes have the same display issue. (HP Pavilion laptop-Windows10, i7) It appears that the bottom of screen is in a fixed position -see screenshot.

Any suggestions appreciated,

Hello, when i put a message in the garbage can, thundirbird open immediately a new message. sometimes i think that the new message is the old one and i put it in the can without reading it... So, i would like that thundirbird does not open a new message when i put one in the garbage can, i want it open a message only if i clic on it manually, not automatically. Is it possible in the settings ( i have not found)

thanks.

Keep on downloading Mozilla Thunderbird Release but it keep coming up as ESR. How can just have Release? My email account with Mozilla is [edited email from community support forum] @pc-q.net can you reply there.

My computer recently crashed, and I've only been able to partly restore it. One of the casualties seems to be access to Thunderbird (although I've just accessed this help page with the password that doesn't work with the App).

hello, i cannot seem to find a solution online, hopefully someone here can help.

i often receive emails with images attached, and most of the time people don't resize the image. so you can imagine over time this all adds up. i dont always need to keep a 6mb image versions. i would love if there is a way to resize the email image attachment, to at least still have a smaller copy for refence, but not end up with a huge email account (local/pop3)

preferably a one click solution, or even a routine i can run on the file system, etc.

thanks

I have been using Thunderbird with two POP3 Hotmail accounts for some time and I am trying to set up a third account with exactly the same configuration. However, both the automatic and the manual configurations failed. The new account receives mail, but the outgoing smtp server config seems to have a problem. Sending messages times out or keeps prompting for a new password.

The Hotmail account has POP3 and IMAP enabled. Thunderbird is set to receive all cookies. I cleared history and cache after every attempt and also temporarily disabled the firewall.

Any suggestions about what the problem could be?

Dear Support Team,

I am writing to report an issue I am experiencing with Thunderbird. Every time I use Thunderbird, an attached error message keeps appearing. This problem is delaying my work and affecting my daily tasks.

I kindly request your assistance in checking and resolving this issue as soon as possible. Please let me know if you need any additional information or screenshots of the error message.

Your prompt support would be greatly appreciated.

Thank you

Hello,

I downloaded all my emails from my .com mailbox into Mozilla Thunderbird. I could see all of them for about three days, and I was very happy to have them stored locally, as I am planning to move my mailbox elsewhere.

However, today all folders appear empty in Thunderbird and I can no longer see the emails, even though I can see that the files are still stored on my computer.

I have been trying for hours to solve this problem with the help of AI, but without success.

Could you please help me restore or display the emails that were downloaded locally?

Thank you very much for your help.

Best regards, Michaela

Four accounts: Rogers Yahoo, Office365, GMX, and a second Yahoo account

When Thunderbird recently asked to access to my provider's server, I gave my Rogers Yahoo account and password; everything looked fine. But when I tried to use my second Yahoo email account, all the folders contained the same data as the Rogers Yahoo account, even though the email addresses were different; my original emails were gone from the Inbox and other folders.

So I began to follow the instructions in Mozilla's page "OAuth2 Authentication for Yahoo, AOL and ATT". 1) with Config Editor, changed "mailnews.oauth.usePrivateBrowser" to TRUE 2) checked for "Accept cookies from sites" in Privacy & Security settings 3) checked authentication settings: All Outgoing servers were set to "OAuth2", as well as Yahoo and Office365 incoming servers. The GMX incoming server was set at "Normal Password" with no option for "OAuth2". 4) I am in Canada and do not use VPN. 5) Finally, I deleted the second Yahoo account (tc2002ca) and all its data from Thunderbird. I logged into Yahoo! Mail online to make sure I had the correct password. I then added tc2002ca as a new account using manual configuration. I entered all the settings to match the Rogers Yahoo account, except (of course) the password which was associated with the tc2002ca account. The result: same as before - all the folders of this account were identical to the Rogers Yahoo account.

To summarize, all the settings in the two Yahoo accounts were the same (imap.mail.yahoo.com and smtp.mail.yahoo.com) except the passwords. When I "tested connection to server" in each case it came back "Successful". Please help me get back to having two Yahoo accounts in Thunderbird, as I have had for years. By the way, I have had no problem using SeaMonkey in a similar way. Thanks!

As soon as I click on the Thunderbird Icon to start Thunderbird I get a Yahoo Page covering over my Thunderbird page with no practical way to remove the Yahoo page permanently? This is like a scam page or something from a devious hacker?

Using Acronis True Image for Western Digital (ver 2025 build 41936) to backup my files on a daily basis. Recently the backup program has been stopping and reporting that it cannot access some Thunderbird files, even when Thunderbird was not running (1st image) I tried 'Compacting all Folders' in Thunderbird but the result was the same (2nd image). Lastly, I tried clearing the cache - the result is the same. In all cases Thunderbird was not running during the backup.

i realize that this is not a Thunderbird issue, but I've been unable to get help elsewhere. I wondered if anyone might have a solution since Acronis apparently sees the file as being accessed - is there a way to remove that?