Thunderbird Community Forum

Certificate errors have been an ongoing, several-times-a-day frustration for me and other users, with different ISPs, since approximately June 25. Is anyone working on this bug? Because it clearly is a bug: Not only I but several other users have reported that Thunderbird worked fine until that date, then stopped working fine. What changed, and can it be put back the way it was, or can we receive some explicit instructions on how to fix it for ourselves? It's making Thunderbird borderline unusable. Every time I try to send a message, I have to confirm a security exception, then send it again. Several times a day, when I try to fetch messages, I have to confirm security exceptions. The confirmations never seem to stick. This is some BS.

TBird keeps asking permission to connect to a gmail account I no longer use and is supposed to be deleted by Google. I keep selecting Deny but it continues. I have a new gmail account I've been using for over a month and this just started. I deleted every reference I can find to the old account but all to no avail. Suggestions welcomed.

Since the Sequoia install on my Mac I have had many issues. Most of them involve getting logged in to sites I use frequently. Yesterday and today I was unable to load the most recent firefox update and then the most recent thunderbird update. The wheel keeps spinning but nothing actually happens.

Cannot delete e-mails from inbox. Cannot move them to Trash. Will copy only a few into trash and not remove them from the inbox. Emptied trash, compacted inbox. Read your suggestions, not help. Using Windows 10, latest version, Thunderbird 139.0.2.

My tags stopped working, right click -> Tag no longer has the list of tags, although 'Manage Tags' shows my list of tags and 'New Tag' applies the tag to the selected message, but no tags appear on right click-> Tag list. I'm using Mac OS Version 15.5 and Thunderbird 139.0.2 and have rebooted and reinstalled Thunderbird to no effect. Thanks for any help you may have!

My desktop computer died, so I needed to copy all my data files from backup (which worked fine) and then install all the apps that I regularly run on my laptop. When I installed Thunderbird, I got the latest Release 139.02. It behaves very differently from what I think is called the "Classic View" that was running on my Desktop. I REALLY hate it, but can't figure out how to set the Thunderbird parameters to do that. My problems include:

-- Overview of Thunderbird "Views". I can't find any documentation that explains [a] the various viewing options that Thunderbird offers and [b] EXACTLY how to set them.

-- Release Notes. I haven't found any release notes to explain when/why a major change to view was done.

-- Periodically, even for same release, Thunderbird CHANGES my parameter settings. Most annoying is changing the General Message-List settings to "Show Only Display Names For People in My Address Book". I live in a retirement community where many husbands & wives share the same Email address. With this setting, Thunderbird shows the name associate with the first message I received from this Email address. So the heading doesn't show which person actually sent it (although I can make a good guess when Thunderbird is telling me it came from a dead person. [g]

Is there ANY way I can get Release 139.0.2 to display messages the way I've been seeing them for at least 10 years? I REALLY need help. (If I can't get Thunderbird to behave the way I want, seem like I might as well switch to reading/writing messages directly from Google Gmail web site. It's equally lacking in documentation, but I suppose that eventually I could figure it out.)

Thanks in advance for any help anybody can offer.GMail, I'd seriously consider switch to using Gmail directly without Thunderbird.)

Hello. Apparently the TbSync extension no longer supports CalDav calendars since its now native in TB. I have tried to follow the directions below but it fails to authorize TB. In step 8, which password (apple account or app specific) as its not clear which one to use?

1. Generate an app specific password by logging into your apple account and generate an new password for TB. 2. Open TB 3. Create a new calendar 4. Choose :On the Network" 5. Select "CalDAV" (does not appear in TB)? 6. Enter a username (the apple id in xxx@xxx.xxx format) 7. Enter a URL for the calendar ( https://caldav.icloud.com/test@gmail.com/calendars/calendar1/ ) 8. Enter the password for https://caldav.icloud.com/test@gmail.com/calendars/calendar1/

Any help here would be greatly appreciated. Thanks.

I was searching for an email that I had just deleted and discovered that the Trash folder connected to my inbox was empty. The one connected to my Local folders, however, was not. I cannot find a setting that would instruct Thunderbird on how long to save emails in the Trash folder and am sure I did not accidentally change anything. Any idea how to fix this?

I'm in the process of cleaning up Thunderbird e-mail before moving to a new computer. I started with 11,593 e-mails in my Inbox and 7,799 e-mails in my Sent folder. I'm now down to 7,634 in my Inbox and 4,965 in my Sent folder. I've allocated 2 weeks for this process and found that it's taking me about 3 hours per day to meet my daily goals. I'm finding that I'm spending at LEAST half the time responding to "Empty-Trash/Compact-folders" requests. There are times I can delete 50 e-mails at a time without getting a request. Other times I will try to delete ten e-mails and get the request. With the old version of Thunderbird I could literally delete hundreds of e-mails at a time. Can you help? Russ Bukwa Yardley, PA ps. I have intentionally given you specific numbers. Based on my software- and test-engineering experience, I speculate you need to create a stress test to solve this nagging problem.

The latest version, June 24, 2025 I think, of thunderbird on my desktop 128.11.1esr will not retrieve messages from centurylink's SMPT server and gives a pop-up window with "Login to server pop.centurylink.net with username orgates@centurylink.net failed." I have no problem manually logging into centurylink and did not change anything on my thunderbird end. Also, I cannot add a centurylink account to thunderbird either.

Having selected multiple messages, I'm trying to move them to a new sub-folder, however this option seems to have vanished! I've installed version 139.0.2 (64-bit).

Hello,

Recently I have started to have emails fail to deliver to a certain domain and the message that comes back is

550 DKIM Sender Invalid - envelope rejected.

I am using Thunderbird v128.8.1 esr (64-bit). Extensions installed are: 1. Attachment Saver (Deimios, v.0.2.2) 2. FileLink provider for Send (Teal Dulcet v2.1.1) 3. Remove Duplicate Messages (Eyal Rozenberg v0.6.1)

I have been in communication with this client for several years and not had this problem before. When I send email to the same recipients using WebMail there is no problem, it is only when I send from Thunderbird.

I am not using any encryption type of setup.

Has anyone come across this before? Does anyone know of a solution?

Thanks, Franc.

I receive email fine. The website email works fine. I cannot send email via thunderbird and have not changed my settings which worked for years. my smtp account. I have rebooted my Windows 10 pc numerous times. What can do this? How can I fix this>

I suspect there is no fix and I (possibly) can restore from backups, but I would sure like to know what the issue is.

I tried retrieving an e-mail from the "folder" where I kept e-mails from 2023. The "index" one sees displayed for the folder had e-mails from Jan-Mar of 2023, but Thunderbird froze when I tried to open any of them. I tried the repair function (which I imagine is meant to rebuild the .msf file), but after than the index contained nothing from Jan-Mar. I opened both the .msf file and the no-extension file in Notepad, but I see nothing from those months.

Any clues/help would be appreciated.

Sometime in the past year or two, ONE of my four accounts started starring (putting the yellow star) on ALL emails I sent from that account.

This is not happening in the other accounts, including an account from the same university email system. If I send an email from the affected account (cischair) it is starred when viewed in cischair but not in the other account I sent it to (suthers). If I send an email from the other account, suthers, to cischair, it is not started in either account but my reply from cischair to suthers will be starred, again only when viewed in cischair, not in suthers.

It's very annoying to have to uncheck the stars on everything I send, and makes them useless.

Of course, I have looked in Account Settings for something that turns this on and off, and have not found anything.

Could you tell me where this might be set, or perhaps inadvertently by some keystroke combination (the bane of usability)?

Thanks - Dan