Thunderbird Community Forum

Thunderbird is very glitchy and slow after the latest update - Thunderbird 140.11.1esr (20260522210329)

Especially, when I get a new email, Thunderbird stops responding for 5-10 seconds and then starts working.

I am using Windows 11

I have four different email accounts. A week ago, all incoming and outgoing traffic suddenly stopped . Webmail works normally. I have no viruses, trojans, etc. I deleted one of the accounts and tried reinstalling it. I can't do it anymore. The system keeps responding: "Unable to authenticate to the server. Username or password configuration may be incorrect." But they are all abolutely correct. I don't know what else to do. Any clue? Thanks

Hi, a long-time Thunderbird user here using 140.11.1esr (64-bit) Thunderbird for Linux Mintmint-001 - 1.0 with e-mail set up as IMAP for a hotmail.com e-mail.

I'm having (and always have tbh) had problems with saving only one copy of "Sent" e-mails and it's driving me scatty. In "Thunderbird setup" for my hotmail.com account, I always de-select "When sending messages, automatically Place a copy in "Sent" folder" as I know my Hotmail account does that and then Thunderbird will pick that up to store locally as part of the IMAP syncing. I get, as expected, only one "Saved" copy which is fine.

Then, for no apparent reason, I suddenly start to get duplicates even though the "de-select" is still there in Thunderbird setup for the account. The cure seems to be to select it as if I want 2 copies and send myself a test e-mail, then de-select it again so I only get one at which point I only get one copy again. It then works fine for weeks (or months!!!) then, bang, 2 copies start appearing again with nothing (seemingly) changed.

I also have a gmail.com account set up as IMAP which never changes - I've always only ever got one "Sent" copy as expected. Clearly, this points to some sort of weird Thunderbird/Hotmail config issue which is odd as the "mechanics" of Thunderbirds internal handling of copies should not be affected by the remote e-mail and yet the issue is with hotmail.com but never with gmail.com accounts. As a Comms/Radar engineer it's really got me!

Anyone else seen this and, if so, are you able to tell me what's up? What am I doing wrong? It's very odd. Cheers!

I received a spam message this morning that had a "Disposition-Notification-To" (aka Read Receipt) line that had MY email address on it. I honestly don't know why a spammer would do this - but that's not the issue. I have Read Receipts disabled, but Thunderbird generated an email (to me) and sent it to my mail host. This seems like a bug. Even if the Read Receipt has my email address on it (making it mostly harmless), Thunderbird shouldn't have generated the message. Or am I missing something? Thanks.

I can no longer download my email from the server to my Thunderbird email client since I removed the specifics for the server with the password. I need to add it back but I don't know how. Is there a file I can edit?

Hi! I'm hoping you can help me! I use Thunderbird, and have for many years, and I love it. My computer is on its last legs, and I'm trying to save up for a new one, but, yesterday I did something possibly stupid... (yeah, I know, you NEVER get people asking for help who've done stupid things, so this will be unusual... lol). Anyway... I turned my computer on and got a popup saying that my Thunderbird needs an update and it's been a while since I updated, so I hit OK on the update... Well, my arsehole of a computer chose that exact minute to shit itself and die. When I tried restarting it, my Thunderbird no longer works. Now I have a popup with a big red X that says "The installation seems to be corrupt. Please check your hardware and disk setup and/or re-install." Can you help me? I desperately need to check my email and have one I need to send. I don't know what to do. I've also got YEARS worth of emails sitting in the system, so I can't risk losing them, either. Please help. L.

I recently updated windows and since then I have not been able to login to my emails and or recover contacts or calendar on thunderbird. I am able to login to my primary email but I have no contacts and am not able to login to my other 2 email accounts.

I use Thunderbird with Threaded View enabled and would like to keep using it.

What I am looking for is a way to have Thunderbird automatically keep older threads collapsed, while allowing threads that contain new or unread messages to remain expanded or become expanded automatically.

For example, a thread receives a new message - it is fine for that thread to be expanded. All other existing threads without new activity should remain collapsed. When Thunderbird is restarted, I would like older threads to stay collapsed rather than having many previously viewed threads expanded.

Is there a setting, hidden preference, add-on, or workaround that provides this behavior?

I am using Thunderbird on Kubuntu Linux.

Thanks in advance. I'm trying to get Thunderbird setup with an outlook.com email address. All the default server settings look fine. I know the email address is good since I can login via a web browser. Cookies enabled and all the other recommended settings including app password. Yet it keeps saying Unable to log into the server. Has anyone successfully done this with the latest version of Thunderbird. I'm on Zorin 18 Pro.

Regards,

Mark Verhyden

I am getting a lot of email dated a month of more in the future. How do I best filter these out as junk? I tried making a regular filter, but can't find a way to set it to "greater than today."

Some bubble-headed bimbo wiped out the columns inside folders, and deleted the headers - which deleted Thunderbird's ability to choose sorting by date or contact. This f'd it up so BADLY, that I find it USELESS now. I'm going to have to find some other email program.

A 2nd way it was f'd up, is it now seems incapable of importing an existing archive of emails. I tried to do that, and it WIPED OUT the entire archive of "local folders", to create a brand new Local Folder lacking any contents at all. The old stash was DELETED. In the past, I've been able to use this feature of Local Folders, to use the same archive of email between several different OS installations of Thunderbird. Those glory days are gone, thanks to some genius. It seems to have lost the ability to do that.

Really, all this makes me sorry I contributed to Thunderbird, this year. What a waste.

I didn't select to be emailed when somebody answers, because without the sorting I won't be able to notice it happened.

I create a new address book in Thunderbird. I add several email addresses to that book. I close Thunderbird at the end of the day. When I open Thunderbird the next day, the new address book has disappeared. Any idea what I am doing wrong, missing?

Hi folks, I'm managing a group of users, all using Thunderbird as email clients. I want to disable the users ability to ask for read receipts. I have succeeded to disable read receipt confirmation in a policies.json file, but I also want to block the users from asking for read receipts. I have scanned the different options, but nothing that seems suitable exist.

I would be grateful for help here.

Best regards,

Peter

People are not receiving my emails. I am receiving other peoples emails. I am using Linux Mint 22 and Thunderbird 140.11.1esr. If I send an email and look in the sent folder, it shows that it has been sent. If I log into my Bell Webmail portal and check the sent folder there, it shows that the email has been sent. But no one gets my emails. If I send an email from my Bell Webmail portal, people receive that email. I have re-installed Thunderbird and allowed Thunderbird to autofil the incoming and outgoing server information after entering my user name and password. No change. I have contacted Bell my internet provider and they have told me that because I can send from the Webmail portal and not from my Desktop, it is a Thunderbird problem. It seems that this problem may have start just after Thunderbird received an update about 2-4 weeks ago. It has been around a month since the last time I had a back and forth email exchange. Searching the forum has been difficult to find an issue similar to mine. Any help would be appreciated. Robert

thunderbird keeps stating the following: Sending of the message failed. There was an error attaching My 2nd photo spraying P1080183.JPG. Plese check that you have access to the file.

I get this on the 3 pictures I took myself. What is wrong with your system now? Is this an AI problem? Why am I getting questioned on my pictures now??? Very irritating since no one can answer this simple question.

Pictures are of my area / since I can't find any version number for Thunderbird / but it is updated always it is the most current when AI is present

My machine Intel i3 6100, 16g of ddr4, windows 10. 250 gb ssd +1 tb mech hard drive

Over the last week or so, I call up Thunderbird then when I click on anything, it just comes back "Not responding" Any ideas?

Thanks in advance Tony Sneath

I'm asking this question so I can post some helpful information for people wanting to create a backup of their profile.

If you are using Windows OS and you got your download from the official website: https://www.thunderbird.net/en-US/thunderbird/all/

How do you locate the correct folder to backup? The backup must contain everything, profiles, mail accounts, emails, address books, calendar, preferences - the lot. The backup can be used to transfer between computers.