Thunderbird Community Forum

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!

Sometimes while I am in an other program, there pops up at the right side a message from Thunderbird that there has come an email. I don't want that but there is no way I can control this.

Hi,

My local folder is on my Unraid sever. I have full access to the sever, In thunderbird I can see all my mails in "local Folder" I can transfer mail in the local folder and move them around, create new subfolders. But I cannot open any mail. I tried to change the directory of the local folder to a different source and back to my server. Nothing.... I can see every thing, move things around, but I just can't open any mail??? It's not a server access problem, because I wouldn't be able to move files in or out of the "local Folder" repertoire.

Any Ideas, J-P

I am a club secretary and have sent emails to mulitple recipients as BCC on a regular basis. Today this stopped working. I am using Thunderbird Version 128.11.1esr. I updated to this about a week ago. I have not recently updated Windows.

The error message says sending the email failed: the subject matter, the attachments or a link may contain spam or phishing or malware.

but if I send exactly the same email to one email, to an unblinded address it is sent without problem.

I updated Windows today to no effect.

On replpacing our SMTP server, we've found a strange problem.

Connecting to the SMTP server through TLS, the connection fails, if we add another account, it can't get the configuration data from autoconfig.domain.

Using wireshark it appears that it doesn't even attampt to resolve or connect to the autoconfig server (or connect throughj a proxy).

I can change the SMTP configuration to send insecurely (server can be accessed internally).

If I use a portable copy of thunderbird or start a new User Profile, both autoconfig and connecting to the server works, but all existing users profiles are broken in exactly the same way.

Does anyone know if there's a way to fix the profiles withough removing them and starting from scratch?

TIA for any help in resolving this.

A week or two ago I started having two problems with Thunderbird, but only with some emails related to my clients. Here is a description of each problem (in case the problems are related):

Doubled incoming emails

Emails received at my address david@nsrusa.org are being received and displayed twice. I have set both my email domain servers to delete messages from the server, which is the top advice always given for this problem. The advice doesn't work for me.

Outgoing message failure

Some messages I send using Reply (perhaps the doubled messages) are getting "stuck" in my email server, which keeps sending me updates on this failure. Here is the start of a typical failure message:

This message was created automatically by mail delivery software. A message that you sent has not yet been delivered to one or more of its recipients after more than 48 hours on the queue on server.springtimesoftware.com.

The message identifier is: 1uQFjK-00GA1j-05 The date of the message is: Fri, 13 Jun 2025 21:30:45 -0400 The subject of the message is: Re: Your recent postings

The addresses to which the message has not yet been delivered are:

 ***@bol.com.br
   host mx3.bol.com.br [200.147.41.201]
   Delay reason: SMTP error from remote mail server after RCPT TO:<***@bol.com.br>:
   450 4.7.25 Client host rejected: cannot find your hostname, [69.48.183.241]
 ***@gereconsult.com
   Delay reason: H=mx-vip-01.kinghost.net [191.6.216.38]:
   SMTP error from remote mail server after RCPT TO:<silviomartins@gereconsult.com>:
   450 4.7.25 Client host reje

My environment: Mailservers are mail.nsrusa.org and mail.springtimesoftware.com, both at IP address 69.48.183.241, Windows 11 Home 64, Thunderbird 128.8.1esr 32 (I have just updated to 128.11.1esr), hp laptop.

I am struggling trying to get a consistent format in Thunderbird. First of all let me say that I am happy with the default use of paragraph style and if I want to have occasional single spacing I can use shift-enter instead of enter. Most queries on formatting seem to be about getting single spacing all the time. That is not my issue. That means that if I compose an email from scratch everything is just the way I want it, using the default settings. The problem arises when I reply to an email. The settings then seem to be ignored. For instance the line spacing can be fixed to single spacing whether I select paragraph or body text and no matter what I do I can't get it to follow the default behaviour. Also, I noticed that the font goes to "sans-serifArial" instead of the usual "Variable Width". In fact if I try to select "Variable Width" in the Format menu it is just ignored. How do I get the default composition settings when I reply to an incoming email?

With some of the messages I receive and with film sites such as Netflix and HBO Max, the screen becomes too large to access the control column on the right, a necessary manuever as the scroll arrow has suddenly lost its ability to scroll when that column is no longer seen. What do I need to do to rectify this?

After updating Thunderbird to version 139.0.2 Thunderbird can't connect to my E-Mail provider! Getting error massage saying “user name or password are wrong!” It happening on my PC with windows10 Pro and the same on my laptop with windows 11 Pro. On my browser or my mobile, I can connect without any problem to my e-mail provider. After consulting my provider, his suggestion was to try installing my account again. I did but it didn’t work (same error) I tried installing older version which Thunderbird was functioning on. It didn’t work either. Even that I cleaned my PC from Thunderbird totally. To clear this point on Versions 139.0 and 139.0.1 Thunderbird function as always before. Up to now any Thunderbird update took automatically the existing setting without any problem. Any information how to solve my problem? Thanks.

(Unable to send a bug report via connect.mozilla.org, I have to leave feedback here.) After importing feeds from OPML into Thunderbird 140.0b2 (64-bit), I will export them.

I had to attach fragments of files as screenshots because this site does not allow formatting text as code and removes part of the text.

It seems to me that the export is broken because the generated file lacks both a link to the feed itself (xmlUrl) and to the management web page (htmlUrl). And if the latter is not critical, then without a link to the feed the generated OPML file is useless.

When I import feeds from OPML, I can open the feed properties window ("Folder Properties"), but the only text data I can see is "Name" (taken from "text" or "title") and "Location" (assigned to the feed by the application, and looks like `mailbox://nobody@Feeds/Google Alerts. 941f2f87`). So the feed properties do not have the feed address (xmlUrl), which would allow it to be uniquely identified with feeds in the OPML file, feeds in another aggregator application, or with the Google Alerts interface. Also, when importing, the htmlUrl address, which is used to specify the address of the web interface for managing feeds (useless information for the application, but sometimes useful to the user), seems to be lost.

Also, as far as I understand, Thunderbird does not provide the user with the ability to see the date a feed was added to the application (or filter or sort feeds by this property), or an error log when updating it. Is this correct?

I imported an OPML file with 1872 feeds into Thunderbird 140.0b2 (64-bit), and having no other way to tell if all the feeds were imported successfully, I exported the result to OPML. It turned out that 1871 feeds were imported. I have no idea which feed was skipped. I can figure this out after processing using a spreadsheet, but it would be much more convenient to get a list of erroneous feeds with errors right in the import window.

How do I enable the display of the number of selected feeds? I have all toolbars enabled, but as I select feeds in the navigation panel, I don't see the changing number anywhere. The context menu of selected feeds only has the following items:

1. Options
2. Open in New Tab
3. Open in New Window
4. Delete
5. Move To >
6. Copy To >
7. Compact
8. Mark Folder as Read

currently experiencing error messages regarding my verified address(s) for sending (?)! Had to stop using service temporarily, (I hope) , until resolved...Any response would be welcome Thanx ..

hello all know i ma have asked this recently but either never got an answer or forgot the answer please allow me to ask again/ In my drafts folder when i put something in there should it not be from the actual person that send it> well almost everything in there says my name from and too and not the actual person or company that sent it. i will send you something every thing in the drafts folder has a yellow label at the bottom and the photo i am sending will show you. Now even as far back as 2016 i have some things i sent to drafts and they have my name from and too. I think my Thunderbird is just messed up ok send one photo of just the yellowline at the bottom and send a draft i had saved from 2019 that has the same yellow line

Hi! I'm trying to set Thunderbird as the operating system default under Win 11. I tried to follow Mozilla's instructions: 1. Open the Settings application by pressing and releasing the Windows Start button, then clicking the gear icon. 2. Click the Apps icon, then click Default Apps in the list. 3. Click the icon under the heading Email to show your choices. 4. Select Thunderbird. The trouble is that at n. 3 there is no choice. There is only 'OutlookAccounts' and this item cannot be deleted or replaced. Can you help? All the best, Robifiori