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I am able to receive emails on Thunderbird but I am not able to send emails to anybody from Thunderbird. That happens on two computers I have. I am able to send emails from Outlook. Therefore, it is not my email provider's (BluePeak) problem. When I try to send an email from Thunderbird, I receive the following error message: “Sending the message failed. SSL received a record with an incorrect Message Authorization Code. The configuration related to must be corrected.”

Please help me resolve this issue. Thank you very much!

How can I move emails within Thunderbird? I want to move emails from the Sent folder of my old email account to the Sent Folder of my current email account. Emails don't move when I right-click on them and select "Move to" and then select the destination folder. All that happens is that the Thunderbird status bar reports: "Looking up pop...." "Connecting to pop..." "Connected to pop..." "Checking mail server capabilities."

The same question is from 2020. Today I had to reinstall but can't find a solution to switch to a readable light version. NOTE to developers. in SETTINGS is a section called "Language and Appearance." It should be here. The Dark Mode setting should be there - it would make hundreds of people happy.

Thanks for your help.

I try to access my messages from an outlook.com account with Thunderbird mac. I get the error message "the STAT command did not succeed". This happened suddenly today without changing any parameter. POP is enabled on this account. Moreover on another mac with Thunderbird everything is correct with the same account. Cookies are enabled I tried changing OAuth2 to normal and changing back. No sucess. What could I try next? Thanks.

As of 7/10/2025, Xfinity Streaming does not open through Firefox. I much prefer Firefox to any other browser so I am a little mystified as to why all of a sudden Xfinity Streaming does not open. I receive my Comcast email through FireFox but when it comes to streaming content, the Xfinity logo just sits there and does not open.

When pasting an image from the clipboard in Outlook Web Access in Edge there's right mouse button option to "Paste as Image". This places the image inline. In Firefox there's no option like this.

Safe mode (troubleshooting mode) doesn't fix this. Ctrl + V or Shift + Ctrl + V doesn't fix it. Shift RMB to get Firefox menu does show Paste and Paste without formatting but it doesn't paste any inline image.

I've attached a screenshot of Edge and Firefox with the Outlook context menu and Firefox context menu.

Firefox version: 140.0.4 (64-bit) Edge version: 138.0.3351.83 (Official build) (64-bit)

How can I download an older version of Firefox ? Version 140.0.4 is full of issues , i.e. slow loading pages that were faster in the old version , shrunk images on some sites , log in problems on others.

Xfinity streaming works on Chrome and Safari but it stopped working on Firefox a few days ago. Why? I am using the latest Firefox version 140.0.4 (64 bit) and I can only receive my emails. The connection to the streaming service does not open. The Xfinity logo just sits there spinning and no connection. Please fix this. I much prefer Firefox to other browsers BUT....

Hello

Win 10 latest version, very old Dell Optiplex.

Background - Following a major corruption caused by a Win 10 update, I had to re-install a fresh copy of Win 10. I also had to re-install Thunderbird, and copied into the profiles a saved profile from a several months ago (later backups were lost in the same WIN 10 update catastrophe). Of course when I re-started Thunderbird, several hundreds of emails from the missing dates were downloaded from the email providers,

I have eight email accounts.

Now the left hand display box is weird.

My second most used account has empty, duplicated folders for Drafts and Sent, that I would like to delete.

Other accounts have a seemingly random list of sub-folders, some empty, some with one or two items in them.

The big problem is two email accounts' inboxes do not appear at all, and have probably been hidden away in the Local Folders Inbox.

Please help me sort out this muddle, so that there is a coherent list of all my email accounts.

While composing new message window and opening the attached pdf file to check whether right file attached (from email composing window) an error occurs pdf could not be opened, because the associated helper application does not exist. Change the association in your preferences, but, I can open the pdf files (same email or other drafted emails) from "draft folder, after sending and accessing it from Sent folder and even from Inbox folder " which have pdf file attachment, in the system adobe reader. But when I change in default program settings to - "view in Thunderbird" it opens in Thunderbird (opening from composing window too), but I need to view in adobe reader. Using Thunderbird 115.18.0 (64 bit) Supernova in Windows 7 - 64 bit. Any ideas or solution anyone have?

Trying to add new accounts to thunderbird is not working. i input name and email, then the window grays out, the loading icon appears and it just stays like that forever. While this is happening, i am not able to do anything else in thunderbird. and i never get to the point where i copuld input imap settings manually, or input the password. And after verifying, it does this with only some providers or emails like IONOS which is a very big provider....

Hi guys,

I'm trying to uninstall an extension using a GPO, but it's not working.

I've placed a GPO on the user's OU and configured the ID to be removed in the User-Part of that GPO. I previously retrieved the ID using about:debugging.

But nothing happens; the extension isn't removed. (Logoff/Logon/reboot/gpupdate /force .....)

128.11.0esr (64-Bit)

KeePassXC-Browser Extension

The GPOs for Edge and Chrome have the same function. Enter the ID there, and the extension is reliably removed.

Any suggestions? Thanks

Michael

When you search for messages, you will see a preview of the text and any attached attachments. When I open the message, neither the text nor the attachment is displayed.

In the Settings > Local > Disc Space I have selected: Delete messages more than 61 days old.

In the Local > Trash > [right click] > Properties > Retention Policy, I have also specified: Delete messages more than 61 days old.

Why are the messages deleted from the Trash when I close TB?