Thunderbird Community Forum

Oy! If it isn't one thing, it's another:

Before this latest update (earlier this week), when I right-clicked on my Spam folder (int left column of the screen), the drop-down box would open. Then when I left-clicked "Empty Spam", all of the Spam folder messages were *permanently deleted.*

But now? They go into Trash and I cannot figure out a way to change this behavior. I should not have to select all the spam messages and then click <Ctrl> to get rid of them, it should happen when I click "Empty Spam."

How do I solve this/is there anybody there who can fix this?

As you can see in the screenshot, the umlauts are missing in many emails. Unfortunately, the corresponding fonts can no longer be set in Thunderbird; I use version 140.6.0esr (32-bit). Where can I set that ä, ö, ü, ß (...) are displayed normally? Greetings from Berlin, Markus

I'm dealing with a properly updated 'bird: 140.5.0 (32-bit) running on an equally updated Windows 10 desktop. First thing this morning, out of nowhere, I started getting an "unable to write the email to the mailbox..." message when sending, thus I could send but not save. And then I realized I wasn't receiving either, on all three accounts in my Thunderbird. I stopped everything and focused on trying to fix this. It's been an all-day, losing effort. So far.

I tried the various quick checks and fixes recommended here and there: I'm running the program as an administrator. I restarted the program. I rebooted the computer. I think I have enough disk space, but to be sure I deleted some bloat from possibly overly large files. I compacted, even though the program is configured to do that regularly. I temporarily disabled my antivirus program. I went into my webmail and deleted all messages that have arrived since my Thunderbird stopped receiving, in case one of them was corrupted. And probably some other attempts as well. Nothing has helped.

And now a second, even worse issue has fallen from the sky. Thunderbird opens. The folder list is where it always has been. The number of unopened messages in each folder is there in boldface, as always, but...the folders are all blank and I get the dreaded popup: "unable to open the summary file...." Have I lost my years' worth of carefully curated emails?

I've tried folder repair. I've deleted parent.lock. Etc. Nothing. Nothing. Nothing.

I will be super-grateful for any wisdom sent my way.

After getting fed up with the Outlook app on windows. I decided to switch to TB. Now i can recieve my mails but can't send. I don't Use VPN and also checked if Windows Firewall is screwing things up. But those are allowed

Without the following. Unable to login to server (SMTP) smtp.office365.com with username *****@hotmail.com has failed (Translated from dutch)

These are my Settings incoming IMAP server: outlook.office365.com, 993, SSL/TLS, OAuth2 authentication, User Name = *****@hotmail.com outgoing SMTP server: smtp.office365.com, 587, STARTTLS, OAuth2 authentication, User Name = *****@hotmail.com

I have recently installed version 146.0.1 on a new computer, was using 115.10 before. I regularly put about 50 emails in my outbox using the mail merge add on and then send them in one go. I have done this very successfully for a long time using my Fastmail email account. Now after sending about 10 of the emails, Thunderbird hangs and I have to restart it to send the next 10. If I send them via my Gmail account it still works fine. I am trying to understand if this is a Fastmail or Thunderbird issue. I would have liked to try it on my new computer but with version 115.10 but cannot do this as it seems that the Profile is different.

Any advice gratefully received.

Thanks Bob

After many years for whatever reason I decided to change my log in password using Thunderbird with Ionos.com and my S23 Samsung and my Windows 10. This was Saturday December 25, 2025. On same day my S23 and my email account using Ionos.com stopped receiving email sent to my Thunderbird email account. I called Samsung they were of no help except to change my password and tell me to log in again in an hour. This was done while my account was maybe still being looked at by Samsung helper. Today is Sunday what worries me a bit is everything in my email account could still be seen by technician who helped me or anyone else. I went for help this morning at Best Buy. Not much help. I tried to log into my Thunderbird and do not see my password and not sure if I should in using my Firefox log in. I am not receiving any emails to my email account on my windows 10 or S23. Please help be with what to do. And something else. How will I get reply if it is an email and I cannot see it??????????? Thanks

After the 146.0.1 update (installed on December 10th, 2025, OS: Windows 11 25H2), when Thunderbird tries syncing a college email account (email format: first.last@schoolname.schoolabbreviation.edu) I get the following error message popup as a Windows notification: "Server outlook.office365.com responded with an error." When clicking on the error message, it doesn't provide any additional information (no error code or detailed message of what's going on).

Below is the troubleshooting steps I have already tried.

• Restarted computer
• Repaired Thunderbird installation
• Tested connection to server under Account Settings>Server Settings. Shows successful connection.
• Cleared Thunderbird startup cache

Since the account still seems to send and receive emails just fine, I haven't tried removing/readding the account or doing an uninstall/reinstall of Thunderbird.

Any suggestions on where I can find details of what is causing this error and how to fix it? If I need to provide more troubleshooting information, please let me know.

When I recieve email with inline images all are shown as attachment at the end. These are personal photos usually send in an email generated on a cell phone, but the same happens when coming from a PC running t-bird as well. All are Win 11 and the O/S and TBird are all updated regularly. Changing "View Messaage Body As " HTML original, HTML simple, or TEXT, only changes the size of the placeholder. The configuation is pretty much as provided by the setup program. I assume this is a simple setup step I am missing as it is the same on two PCs that are WIN 11 and one that is UBUNTU.

I am on TB 146.0.1.

I recently noticed that some items seemed to be missing from global search results so I ventured to rebuild the GLODA index.

The first few times, it seemed to get stuck on specific IMAP sent folders. I repaired the folders and eventually, the index completed to full success. It is about 2.5 GB.

It still doesn't seem like some searches are working correctly, but maybe there is an explanation. Most of my email other than IMAP sent emails is stored in my Local Archives.

Using the term "klinghardt" for example, global search shows only results from 2025, a total of 992 items, and does shows some from both IMAP and Local Archives. From Local Archives, it shows 255 items in the "From Visitors 2016" folder. It does not go back prior to 2025.

However, there are many earlier emails in that folder before 2025 with the same term.

Using the term "klinghardt education" does show messages back to 2017 and a total of 524 of them in the "From Visitors 2016" folder. Why would using just "klinghardt" show less than "klinghardt education"?

The "From Visitors 2016" folder has almost 140K messages from about 10 years.

If I go "From Visitors 2016" folder and do Search Messages with the same "klinghardt" term on subject alone, I get 982 returned messages that go back to 2015. I believe this is not using GLODA but am not certain.

If I go to Quick Filter on Sender, Recipients, Subject, I get 1251 items going back to 2015.

If I see messages over many years with Search Messages and Quick Filter, why do I only see messages from 2025 when I use the global search?

To make things a bit more complex, there is also a "From Visitors" folder in Local Archives that has hundreds more with terms from 2011-2015 that don't seem to show up in the global search results at all with either of the above. If I use "klinghardt academy" though, some results do come back from the "From Visitors" folder. Total of 32K messages in the From Visitors folder.

I have already tried many options from the documentation and suggested by ChatGPT but am hesitant to do anything that could not be reversible.

At this point, I am unclear on what here is a problem vs. an explainable behavior.

I would be grateful or any thoughts or next steps you might suggest.

Thank you and happy holidays, :) Scott

After deleting all emails from a sender, their email address is still appearing in the search box. For example if I delete all emails from rubbish@rubbish.com the email address is showing as soon as I enter "rubb" in the search box I want to delete this address but don't know where it is stored All help appreciated

I have had my @yahoo.ca email for many years. I have always used Thunderbird to retrieve my email and read it locally on my desktop. Recently when Thunderbird launched Rogers take over and wants me to lo in to rogers. It is not a Rogers.com email address, it is a yahoo.ca email address.

Why has Rogers taken over my email.

I can still access my email on the web at the yahoo.ca website, but I want it back in Thunderbird as well.

john_f_burke@yahoo.ca

Recently, I have experienced an erroneous browser launch, simply by clicking on the title of the message in the list pane. This problem seems to occur when clicking on emails from a particular UK supermarket (tesco.com) and the web page opened has a long and complicated URL, but the page contains only a single pixel which shows up as a white dot on a black background.

Obviously, it is likely that there is something strange about that source, but the problem doesn't occur if I click on the same email in a different email client (in this case Evolution).

I have tried various Settings as advised by web searches and also the solutions suggested in Thunderbird Help (Troubleshooting Mode and Troubleshooting Information).

I am running Thunderbird 140.5.0esr (64-bit) on Kubuntu Linux 24.04.

Hi, I am transitioning from Mac, after 30+ years, to Linux. Part of this is making sure that certain heavily used applications can be relied-upon in Linux. A couple days ago I successfully installed Thunderbird and moved my Profiles into the Linux version of Thunderbird. (This really needs better guidance from Mozilla! What I found on the subject was definitely NOT accurate!! Instructions should NOT be identical for all platforms). In a cautious abundance of excess, I repeated the same transfer onto a second Linux machine. Now I have Thunderbird running on my desktop Mac Mini AND on two separate Linux machines. Eventually, it will be removed from the Mac. What I never expected was that every time I received, deleted, read, etc., email, the same action would occur on the other two machines, regardless of on which machine I made changes. All accounts are set up as POP accounts, BTW. How is this possible? are the three instances of Thunderbird aware of each other on my local network? Or, is there some sort of updating processing happening from my ISP? Regardless, I am thrilled that I can potentially use Thunderbird simultaneously on different machines, but... Down Side: Apparently, not everything is mirrored. I just moved a newly received email from the inbox to a local folder inside Thunderbird. That action was NOT copied on the other two machines. Is there anything I can do to keep ALL the folders in sync? Thanks very much.

1. I am getting Mozilla Thunderbird ESR notices pop up when I log on to my PC (W11). I checked my Thunderbird version and I have 146.0.1 and I am on the release channel so why am I getting these notices ? 2. Recently I noticed that when I try to move e-mail messages to a specific folder, I right click on the message and get the prompt Move To and then Recent Destinations where the problem exists. The list of Recent Destinations used to be in alphabetical order and now it is sorted by most recent destination time. This slows me down considerably. Please revert. Thanks !!

my thunderbird freezes at the point of checking mails. when i try to update it, it opens a new application completely and doesn't update my present one. i also can't find the location of the app or the data. pls help!!!

Hi all - I'm running Thunderbird (14.05) on a desktop Mac running Sequoia 15.7.2

In my Local Folders, I have sub folders which in turn have a large number of subfolders. All of those sub folders are automatically listed alphabetically as they're created. In the last couple days, a fairly random selection of six folders from topline folders, sub folders and subsub folders have been shifted to the end of the alphabetized list and I have absolutely no idea why. I can manually move them back no problem, but I'd really like to stop it happening again! Also, I've tried clicking on the topline folder and choosing to sort by subject, but it changes nothing. Even renaming an mis-listed folder to a new name does not make it move to its correct place in the alphabet. Any ideas? Thanks

This has happened to me twice now. I do not delete emails from purchases until the item is received. I leave it in my inbox and often will mark it unread. I went into it yesterday to check to see when I should receive a certain item and the email is gone. I have looked in all folders (spam, trash, archive, all mail) and it is not there. I blamed G-mail originally but now wonder if it is Thunderbird and if there is some way to retrieve it. Is there a defunct setting somewhere that I do not know about or understand? I have plenty of storage. Can someone answer this for me?