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Hello, I am unable to see my email messages in the panel. I do see the number of emails that I have, but unable to open anything. Has something major happened with Thunderbird? The email function was working fine and the next morning, all of my messages in the panel disappeared.

I'd appreciate any immediate feedback. Thank you.

Suddenly, the conversation view has disappeared from my Thunderbird. This happened in version 128, and I have now updated it to the latest version, 138.0.2, but the problem persists. Previously, if I selected any message and right-clicked, there was a local menu option 'View as conversation' (or something similar - I use a localised version). Now, if I right-click the message, it opens with only two options: 'Open in a new pane' or 'Open in a new window'. No conversation view. The default shortcut (CTRL + SHIFT + O) does not work either.

(I did not change any settings, I only compacted folders and tried to rebuild thir index because the global search did not find existing messages.)

Any help on how to restore this functionality would be very much appreciated! Thanks

Suddenly I am getting a pop-up window on Thunderbird asking me to sign in to continue with Mozilla Thunderbird email. It populates my email address and after clicking ‘next’ it says.

‘400. That’s an error. The server cannot process the request because it is malformed. It should not be retried. That’s all we know’.

i cannot send or receive through Thunderbird, at present. Who is the genius out there that can tell me what to do?

我的邮件客户端为128.7.1，用的时IMAP协议。在客户端界面显示收件箱（包括收件箱下级文件夹）总共大小为78GB,但是在%appdata%中的thunderbird文件夹却有恐怖的795GB！！！我尝试压缩收件箱但显示只压缩了7.5GB。。有人知道这是什么问题吗？我应该怎样减小%appdata%中的thunderbird文件夹的大小？谢谢。

Since 5.18.2025 I get a "no message found" in my sent folders and other folders. "Find" will still find the messages and they can be opened, but I can't get the email folders to display. I know they are still there. Version 128.10.2esr. How can I get them to display in the folders?

Everything was fine in 115esr. I think I missed 136 and upgraded to 137, and am now on 138. I have five IMAP accounts. The following behavior happens with all of them and has been occurring since I upgraded (to 137 and 138).

I open Thunderbird and it checks for mail. Inboxes will show new messages. I click on any of the Inboxes with new mail. The spam emails automatically get marked as junk and moved out of inbox, and that happens only after I view that Inbox.

The previous behavior, and what I expect to happen, is that the spam emails would get marked as junk and moved out of Inbox before I view that Inbox. It's odd to have an Inbox show new emails, go to look at the new emails, then watch them get marked as junk and disappear from Inbox. It's like schrodinger's inbox, the act of observing the inbox determines the fate of the spam emails :p

I have noticed a reply to messages made from our phones are not synced with our Thunderbird Desktop. If employee 1 replies to a message from their phone, employee 2 and 3 cannot see their reply. This creates gaps in conversations that negatively affect customer support.

I use the Thunderbird email app on my phone, I am not sure what app others are using.

Is there a setting somewhere I am missing? or is this a bug that needs to be fixed?

Thank you in advance for any help you can provide.

I use Thunderbird 128.10.2 esr (64-bit) on a Mac Book Pro. For some reason, I can no longer change the font color of my outgoing messages. Even my saved templates now all have black text rather than the black and red text that I set them up with.

I didn't change any settings or preferences - this must have happened when the software was automatically updated.

How do I change the color of the text? I only want to change the color of specified parts of my email - not every word.

I have an old HP laptop with Windows 10 (Upgraded from 7 and will probably be abandoned once Windows 10 coverage expires late 2025) that has somehow changed its Sent file from its Regular Mozilla Thunderbird Sent Folder to a Local Sent File Folder.

  Could anyone help me change it back please?   Is there a way to change it back?
  Thanks

My Thunderbird(TB) gets mail from Hotmail, my own domain, and gmail. My TB has stopped retrieving new mail since 05.12.2025. I can send mail but not receive mail. ALL settings are correct. I can go to the original sites individually and all the mail is there. Obviously I can send and receive mail on those sites, but TB will only send mail not receive it. The only thing I have not done is uninstall/reinstall.

Does anyone have any suggestions?

When I run Thunderbird release 138.0.2 64-bit, the Inbox is empty, even when I click the "tree" icon to fetch new e-mails. Instead, a side-popping message box displays "Connection to server pop.orange.fr was reset". Please advise. The Orange messaging service works properly, so why shouldn't Thunderbird?

I bought a new PC in February, backed up all emails and transferred onto new PC. All working fine until last week when windows OS crashed the new PC, managed to re-download Thunderbird and installed everything from back-up USB emails up to February. From February to today no emails have been uploaded in the "local folders". Is there a cloud/ server that stores my old emails in the local folders, so I can recover them, or even a program?

My folders are not appearing under my "inbox". I'm really concerned as I have so much important information in my folders.

Also, trying to delete emails as I do daily by selecting a group (with shift key) and then delete is not working. It doesn't delete the group of emails -- requires one-by-one.

When I try to reply (Gmail account) to a message viewed in Original HTML format, I get no space where I can respond anything. The same when I try to forward the message with a comment. When I view the message in Simple HTML or in plain text and hit the reply button there is no problem.