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Hi All,

I am installing Thunderbird from official GitHub releases and I am wondering why I am getting info from Obtainium that thunderbird-14.0 is something called "pseudo-release".

Can someone explain me this term regarding GitHub apk files? Is it OK to install it?

Regards, Timo

I just used CCleaner health check and when done all my bookmarks were gone. I've had CCleaner for years and never had this happen before (laptop). The troubleshooting list was unclear and did not correct the problem.

mozilla keeps closing out.When it does I lose all passwords and bookmarks.I'm not even home when this happens.This started when I bought a new computer which has windows 11.Old one had 10.When some bookmarks come back they are old one or the don't work

1) Thunderbird 128.12.0es refuses to disable conversation mode, when View/Sort by/Unthreaded is selected for a folder.

2) Thunderbird 128.12.0es does not show the number of selected messages in the Status Bar when I select multiple messages, instead showing the number of selected conversations.

How can I disable conversation mode?

I'm using the latest version (145) and I've setup my office 365 email account. I'm trying to setup my calendar account as well but when I enter location, username and password it says that my credentials were not accepted.

I assume this means that TB is using legacy un/pw authentication which is no longer supported instead of OATH2. There is, however, no option to select OATH2 in the calendar setup process (like there is for email).

Are office 365 calendars supported by TB 145?

hi i have 2 pc's using tb , one can sign in to my outlook.com acct, but the desktop pc can not. have checked all setting etc

the working installation is on esr update channel, other on is not [so i have 2 difference tb versions]. both are updated

if anyone sees in a forum that i had email trouble recently pls note that i now have an old backup of win10 in service on the desktop pc. haven't yest found my way back to that forum to post the results of using peoples advice but they were very helpful

thanks if anyone can assist

After about 20 years of using Thunderbird, since 11/24/25 I can longer send emails [see error message below] I can receive emails without a problem. [see server settings below] Since I can not resolve this problem, I have installed [new] Outlook and am able to receive & send mail with, seemingly, the same server settings. I don't understand the message about failing to find the 'certificate'. I did not update Thunderbird or Windows in the days before this problem started. After several hours of troubleshooting, my ISP has concluded that the problem is not on their end. Since Outlook works OK, I assume they are correct.

Using 140.2.1esr (64-bit) on Win, laptop has plenty of disk space free. When writing a long-ish message, I want to stop and think, so I do Ctrl S to Save... Sometimes works fine. Sometimes Thunderbird hangs and does not save, so I lose everything I wrote, very frustrating. Problem happened off and on during many weeks. I cannot replicate the problem on demand. Shut down- restart did not help. Any help will be much appreciated thanks.

I bought a new PC and wanted to import messages from different backups I've made over the years. I always copied the whole Thunderbird profile folder.

No matter which profile backup I want to import, I get an error. I always choose to import just the messages.

The latest profile I wanted to use was just 2 weeks old.

I always get this message. What do I need to do to successfully import the messages?

I am not able to send or receive emails on my computer using my Thunderbird account. I've tried using the instructions on passwords, but nothing seems to work. Irene

I have setup a new IMAP with Thunderbird and my deleted messages are not displaying in the Trash area. I am currently on release version 141.0 (64 bit). I am running it on Windows 11 Pro service pack 24H2. I do not have any antivirus setup at this time.

First off I have multiple Trash bins, one for each account listed under the Inbox and then one in the Local Folders area, so I am not completely sure why the Local Folders one exists and what it's purpose is for. When I delete a message from the DrReilly account it is removed from the Inbox and and I see the number count go up on my Trash folder under the Inbox. However, when I go to the Trash folder it is completely empty but indicates I have messages in it (see Screenshot 1). I have toggled Unread, Stared, Contacts, Tags, & Attachments and the messages never show. I have verified that when I delete a message it is supposed to direct the messages to the Trash bin (see Screenshot 2).

The interesting thing is my issue is only with the DrReilly account, the deleted messages are showing up in the AHAH account (also an IMAP) with no issues. The only thing I can see different about the 2 accounts is that in the AHAH account folders it has a Trash & a Trash.msf file (see Screenshot 4) and the DrReilly account folders only have the Trash.msf file (see Screenshot 3).

I have tried everything I can find with a search and nothing seems to resolve the issue.

Can someone please help?

Wife's computer died, but I saved the HDD. Got Tbird installed on the new one, retrieved and installed her addressbook on the new computer. Apparently she had a had a folder with saved messages on the old one. Where do I find this on the old harddrive? Recent version of Tbird on old computer, newest iteration on new computer. I have the original hard drive in hot swappable bay right now.

Hi,

On some websites (e.g. archlinux.org) most numbers are not rendered. See attached screenshots showing the same page on Firefox and on Konqueror.

In my font settings, I do allow pages to change fonts. Some pages (e.g. this one) do change the fonts and appear well. However, if I disable the feature, then they also break.

I'm using: firefox 145.0.2 (64-bit) archlinux plasma-desktop 6.5.3 wayland 1.24.0

Any idea?