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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

Since the most recent update, Thunderbird doesn't load the email when clicking on the entry in the inbox, and then when double clicking to open in a new tab, the main window is blank with a Loading... text on the top left, and the URL shown above starts with chrome://

Running Thunderbird 146.0

I have an entry in my address book which I want to update. I right click on the listing and a popup menu appears which includes "Edit". I select that, make changes, but I find no way to SAVE the changes I entered. How do I save the changes?

My PC Has Thunderbird 146.0 (64-bit) which has a Spam folder which my spam/Junk messages are set to go to automatically. My Lenovo Laptop has Thunderbird 140.6 (64-bit) which has a Junk folder and although the settings are the same on both machines the Spam/Junk doesn't go to the Junk folder automatically. According to my Laptop I am up to date with the program, but from the above it versions this doesn't seem to be the case. Can you please help sort this out.

Hi, I am using Fibrus email (network name is HomeWifi and network key is Fibrus123). Fibrus uses eero as a modem. I cannot work out the correct server settings in Thunderbird as there doesn't seem to be a place for 'network key'.

Most grateful for any help you can give me.

Simon

Since the last update to version 146.00, under the folder Archives, both the sub folders for 2024 and 2025 have changed to Drafts and I cannot change them back to show the year folder (2024 & 2025). None of my other yearly Archived sub-folders are affected from 2016 - 2023.

Under Properties, both show their respective year correctly - i.e. imap://wbriggs1%40sky.com@imap.mail.yahoo.com/Archive/2024 and; imap://wbriggs1%40sky.com@imap.mail.yahoo.com/Archive/2025

I attach screenshots showing the issue and any help would be appreciated.

In essence, after trying various ways of trying to sort the above out, it would be helpfull Mozilla if under the Folder Properties box, I could just change the name back from Drafts to the appropriate year. However, in the folder box when selecting the Name line, it won't allow you to alter the folder name. This would seem the simple solution to any alteration of Folders by being allowed to rename them back to the original name.

Hi, I'm Andrea, I'm writing because recently I have noticed problem with the status filter. When I'm creating a new filter and I'm appling a status contition, in the section where I need to decide the type of status doesn't appare anithyng ( view picture attached ). Is a problem about the last release updated or other? Please, write soon. Thanks Andrea

I had two emails on my Thunderbird. I deleted one by mistake. The G Mail account still works. I tried to reenter my Spectrum Account and I keep getting that my configuration user name or password are wrong. I checked all settings and they appear to be correct. I also deleted the account and tried reinstalling it and got the same result. I also tried to enter a new email account that I just got. I had the same result. Keeps asking me to reenter the password. (would be helpful if it would say why it is wrong (password, setting, etc.) I spent hours on this today. I worked with the Spectrum agent and we couldn't fix it. Bur it seems to be a general problem because I get the same result with both accounts.

Sending of the message failed. The message could not be sent because connecting to Outgoing server (SMTP) smtp-mail.outlook.com failed. The server may be unavailable or is refusing SMTP connections. Please verify that your Outgoing server (SMTP) settings are correct and try again.

Seem to get this (or similar) error frequently. It's like the things I set randomly revert or change. Have sent images of settings. I certainly don't know what to do.

I am using Version 146.0, released December 9, 2025, on a Win 11 Pro, v. 25H2 pc. No problems until today. Messages won't download from two AT&T (ameritech.net) accounts. T-bird is not asking for mail key. No change after restarting T-bird; same result after rebooting pc. How do I restore email access? Thanks.

I have three accounts set up in Thunderbird and my "ALL MAIL" folder has disappeared from my GMAIL ACCOUNTS. I did however appear to have 2 x Archive folders but in schofijnet10 one has disappeared in john.schofield10 i have 2 x DRAFT Folders and 2 x Sent folders in schofijnetQaol I have 2 x ARCHIVE and 2 x SPAM Folders Please see the image

since last update my *All Mail* folder is empty but at the top it says there are 138,944 messages. I can use some filters and SOME messages appear but by far not all that should match that filter. any clues? thanks,

Thunderbird 140.6.0esr (aarch64) on a Macintosh using Tahoe 26.1

I had a scammer in my email. I've since taken the computer to a 'fixer' guy --and they got the intruder out. BUT my read emails are disappearing after a short time. Is there some setting that automatically deletes them? how can I find it and change it??

 Sally Smith

I want Thunderbird to stop marking everything I delete as having been read. The way it works now, if I accidentally delete mail that I haven't read yet it's much more difficult to find it when everything is marked read even when it wasn't. I searched everywhere and haven't come up with a solution for this. It was reported as a bug years ago and was never fixed.