Thunderbird Community Forum

I don't like threaded conversations view. I turned it off so my inbox doesn't show it any more, but search results do and I find it impossible to find what I need. Is it possible to turn off ALL of those threading features across the entire program? Thanks

When I turned on my PC this morning there was a new message that popped-up that I never sent which was very difficult to cancel/close/discard so I rebooted my laptop. When I went back into Thunderbird to create a new message, the entire screen was dark and filled with coding (see screen shot below.) If I click on each element I can delete them and get back to a blank page. Also, it appears, thankfully, I am sending and receiving emails as normal. My email domain is with Go Daddy and I do use Owl so don't know if that has any effect. I would appreciate any help. Thank You!

I can' get access to t-online.de since the early morning. There is this message: "Anmeldung auf den Serever fehlgeschlagen" (=Login to the Serever failed) The homepage t.online allow an access to E-mails

hello I left account A (Google) and I am mainly using account B (Google) now. However, when I search for the mail of account A, it only shows the result, but after clicking it, it shows that there is no mail. How can I recover it? This is because the most important mail is in account A. PLEASE HELP ME....

I can't seem to get the search message window to shrink down with the right click commands, nor with the arrows at the edges of the window, this has been going on since the beginning of 128 . . .

I am using MacOS 10.13, Thunderbird 115.15.16ESR: my Hotmail worked until 15 May 2025 and then it would not download new emails. Screenshots are available if you want me to post them. I got an error message: "authentication failure while connecting to server outlook.office365.com". I updated Thunderbird to the latest for my OS: 115.18.0ESR. Still no new emails. I deleted my email account on Thunderbird and tried to reinstate it. Now I get an error message when trying to set up the account: "Unable to log in at server. Probably wrong configuration, username or password." I tested my password by logging into my Microsoft account with it on my browser. I can also login to my email using Firefox, but I want my Thunderbird email client to work again.

The configuration I am using is: I use my normal hotmail password in the password field. I also set up a new App Password with Microsoft and tried that without success. With the 115.18 update there is a new field: Your login. I just put my hotmail email address in here. incoming: outlook.office365.com, port 993, SSL/TLS, Oauth2 
outgoing: smtp.office365.com, port 587, STARTTLS, Oauth2 (I have also tried: smtp-mail.outlook.com)

I enabled 2-step authentication with Microsoft in my Microsoft account more than a year ago. Interestingly, I don't get a prompt on my iPhone Microsoft Authentication App when I select Done when trying to set up the hotmail account on Thunderbird.

Please help. I am desperate, and I have wasted a lot of time on this without success. Cheers

I'm using Thunderbird 128.11.0esr (64-bit) on a Win 10 system, and my email host is DigitalSpace, a Verizon company.

As of this morning, TB no longer gives me a password dialog when I start the app. So, I forced that dialog by sending out a dummy email, and I enter my credentials when asked. Outgoing messages go out without incident.

But even though my password is accepted for SMTP use, the POP incoming function no longer responds to File/Get New Messages for . None of the selections will download any emails.

The banner at the very bottom of the Thunderbird window usually displays a "retrieving emails" message yesterday, as usual. But now this banner is completely blank, nothing happening.

DigitalSpace has given me what they say is the correct POP Server name, and they specify that I should use Port 110. I've attempted to reach the POP server by its name and by its IP4 address, but I see the same fail with both: No response.

Note 1: I'm deleting all cookies at every log-off. Is there any chance that this is affecting TB's performance?

Note 2: Non-Mozilla fix websites have suggested accessing the TB Profile folder, and deleting file global-messages-db.SQLITE . I tried that, but it didn't fix the problem.

==> Can you tell me if there are any additional settings that I need to adjust?

Thanks very much, Bill Bailey Santa Clara, CA

-=0=-

Amazing that there is no topic for Spam, the most hated aspect of email. Mozilla, wake up!

Anyway, I want to be able to highlight a bunch of spam emails, then block all the domains they are being sent from, first checking to make sure nothing was sent from a legit domain like Gmail or Hotmail. Because the smart spammers acquire domains from which they can generate an untold number of email addresses from and they can just a different one every day so blocking an individual email address from someone like this is useless. They'll never use the same one twice because it's so easy to use another one. They own the domain so they control everything at that domain.

I've never heard of any email program offering this which is perplexing as this is the only logical solution to the vast majority of spam we are plagued with in 2025.

We really need an Add-On for Thunderbird as it appears Thunderbird doesn't seem to care.

I recently archived a large number of messages from one of my IMAP accounts. After that, new messages show up as unread headers, but when I click on them, nothing shows up in the preview pane and the status just seems to get stuck on "Loading message". I have done the "Repair Mailbox" thing a couple of times. After a restart, Thunderbird reloads the headers from the server, but I get the same result.

Thunderbird 138/139, Windows 11 Pro 23H2. While composing a message, after a few lines the app freezes. Both the compose window and the main TB window freeze. Only opening the Windows Task manager allows me to close them. This did not happen with earlier versions.

If I save the message every few seconds while composing I can get most of the message back and continue after restarting TB. This behavior is the same in both the normal and troubleshooting TB modes. I can't even find a crash log to send to Mozilla.

Where shall I look next?

Thank you!

I recently received an email from MemberClicks, an email distribution service associated with an organization that I am a member of. I get these periodically and they are always fine. I usually have to click at the top of the email to say "allow content." This current email did not provide that option and it has no observable content. I get a footer, grayed out that says "This email was sent to eberger@compuserve.com by nhcaoffice@hearingconservation.org National Hearing Conservation Association • P.O. Box 3406, 7173 South Havana Street, Suite 600, Centennial, Colorado 80112, United States Remove My Email or Manage Preferences • Privacy Policy Powered by MemberClicks"

If I go to forward the email or reply to the email, when the email opens up that I will be editing and sending, it briefly displays for about 1 s, the content of the email that was not present. I just had the organization resend the email to another account and this time the same problem occurred. However, I was carefully observing and when I first opened it the content was there for 1 s and then disappeared. I was not given any option to allow content.

This has not happened in the past with this provider. Thoughts?

I am running 128.11.0esr(64 bit)

I CANNOT SEND with Thunderbird. I'm using Nobara and my mail server is Synology's Mail Server (NOT Mail PLUS Server).

Below are the setting that I use in a DIFFERENT email app, and I can receive AND SEND.

Nobara Version: 6.14.8-200 For Version: 128.10.2esr

Incoming Mail:

   IMAP:   mail.<my domain>
   SSL/TL
   993
   Normal Password
   No Client Cert
   no auto-detect imap namespace
   no compression

Outgoing Mail:

   SMTP:   <my domain>  (and i have tried smtp.<my domain> too)
   STARTTLS
   587
   Normal Password
   No Client Cert

Hello forum users - I'm new here and hope someone can help me with this one.

I have CalDAV calendars and "tasks" imported into Thunderbird from my main email provider. Both calendars and tasks work fine, both ways, with one exception.

Within Thunderbird, I am unable to reassign an event created in Calendar 1, to Calendar 2. I'm also unable to reassign a task created in Task List 1 to Task List 2. The only cumbersome workaround I found was making Thunderbird go offline (bottom left button), then reassigning the calendar or task while offline, then going back online, and then syncing.

The error message I get when trying to change a calendar or task category while ONLINE is as follows: Error code: MODIFICATION_FAILED Status Code: 2,147,500,037, null Server Replied with 403 If you're seeing this message after snoozing or dismissing a reminder and this is for a calendar you do not want to add or edit events for, you can mark this calendar as read-only to avoid such experience in future. To do so, get to the calendar properties by right-clicking on this calendar in the list in the calendar or task view.

Changing online/offline support options for individual calendars and tasks did not allow me to change their category while online. Also, none of my calendars and tasks are read-only, nor should they be.

Does anyone know why this is happening and how to fix it so that I can change a calendar or task calendar while online?

Hello guys: In MANY YEARS of using Thunderbird, my Incoming messages have started collected in Trash INSTEAD of in the 'Inbox' Folder ALWAYS set in 'Inbox' Folder set as the default: I have spent a lot of times searching for the cause of this malfunction but I can't find to find the cause and the way how to resolve this malfunction. Can anyone provide an effective help to correct this problem please - many thanks, Tony H.

I am trying to upgrade from ESR to Release. I saved my profile successfully, went to the install page and clicked Download. Got a request to donate, which I did. Then I got a page saying Thank you, Finish installing and enjoy Thunderbird. But there is no way to finish installing and I never got a download file. I've tried multiple times, nothing happens. Help!

Hi, Thunderbird macht seit ein paar Wochen Probleme. 4 Emailkonten sind eingerichtet. Es werden aber bei keinem Konto E-Mails abgerufen...es kommt immer ein Timeoutfehler. Deinstalliert man Thunderbird komplett und installiert es wieder, dann funktioniert sofort wieder alles...aber nur für einen Tag...macht man das gleiche Spiel wieder, geht es wieder für einen Tag.

Version ist die 1.39 64bit.

Ich hoffe Ihr könnt helfen. Gruss Peter

About a week and a half ago I experienced an issue with Thunderbird going through file folders and 'randomly' selecting emails to move to the 'Trash' file. At present I have over 1200 messages in 'Trash' with no common denominator for why they were selected. I've never changed my preferences for when or what to delete so it came as a surprise to see this many emails sitting waiting to be manually deleted by me. I'm convinced that the issue must be something in the 'prefs.js' file.

Running TB version: 128.11.0 esr (64-bit) Is the issue tied to version 128.11.0 perhaps?

I have four other TB email client accounts that all work perfectly, except for this one lame duck that really is getting out of hand.

Could probably import and edit the old 'prefs.js' file from a backup of the old email profile, but the number of changes would be significant. File size of the old 'prefs.js' is about 17 Kb's while the newly created one (four days ago) is only 13 Kb's

This client email account is / was very old and has been on the TB update schedule for years. The email address contains upwards of 11,000 emails on the server. There is no server space issue either. The email address is probably more than 10 years old. The other four client email accounts I have are much smaller and less than 4 years old.

Thinking that something in this particular client profile must have gotten clobbered by unknown means, I finally decided to delete the account and set up a new one (losing my address book in the process of course). Fortunately I found an 'abook' in my backups that came close to being up to date.

Now, the new profile has these quirky issues where it won't open the inbox in a window showing the header information that allows one click to open the message immediately below.

Further, the new TB client is constantly downloading and updating folders with old emails from the server each time TB launches, and of course, it adds a few more emails to the 'Trash' file each time. Started at about 700 messages before I decided to delete the client profile and rebuild and now surpasses 1200 in just the last 4 days.

Running out of patience and options.

I have had Thunderbird set to play a sound file when I get a new mail message. I am currently on v128.11.0esr after being on 115 and earlier. I got the custom sound playing whenever a new incoming message arrived but the last several versions seem to have broken that. Possibly v102 was the last time it worked and has reverted to the default system sound for new mail.

After updating to v128.11.0 I was checking all the settings and noticed that path to the sound file shows '%' in place of any spaces in the folder path. I never paid attention to the % before since it worked on this Windows 10 computer since new in 2021 but stopped working in the last few years. I did notice that Edge opens some .mht files and displays the locally saved web pages with the % without a problem. Actually displays '%20' instead of the spaces. If I do file open from Firefox after navigating to the .mht file it opens in Edge instead of Firefox. Not sure if Edge or Firefox saved the webpage originally but now only Edge will open it.

I did change the folder name replacing the spaces with '_' and now the sound will play but if Windows allows spaces in folder names and paths why should Thunderbird now care?