Thunderbird Support Forum

I've been using Thunderbird for years and have never had this problem. Since the upgrade today, after I run Thunderbird once and close it I can no longer start it up again. I have to reboot or use Task Manager to kill it in order to run it. This is on Windows 11. Please help - not an acceptable workaround for long. Optionally, how do I downgrade to previous version? I should know better than allow automatic upgrades.

Adding a couple images below, when it has started successfully it shows as one of the Apps in Task Manager. When I close it, Thunderbird drops into the Background Processes but doesn't end. I have to kill it here in order to start it again.

Start new Windows session. Start Thunderbird and works OK. Shut Thunderbird down and try to re-start during same Windows session and it will not launch. Reboot Windows and try to start Thunderbird and works OK. Alternatively, going into Task Manager there will be a number of Thunderbird processes running. If I manually end them all (while Thunderbird is NOT active) then I can restart as normal too. This all began with 124.0 Beta 1. Never had the issue prior.

Also, Thunderbird crashes if restarting within the app. By this I mean clicking the X it appears to close (excepting those persistent processes running) but "Restart Thunderbird" such as to launch Troubleshooting mode or from the "Restart to update Thunderbird" config crashes the app with 100% consistency.

How does one enable calendars in Thunderbird version 115.8.0? When I click the calendar icon on the left of the page, I get a calendar displayed but it has a message highlighted in yellow that says: "All calendars are currently disabled. Enable an existing calendar or add a new one to create or add events."

I cannot find anything in settings or elsewhere to enable calendars.

TIA

Just trying to upload my email account. It has only partially completed the upload. Files are missing and alterations I made to my actual email account are not showing. Tried taking it off and reloading but has exactly the same errors!

Ever since the last "upgrade" which is terrible I get my emails in threads. Does anyone know how to get rid of the stupid threaded messages? I've tried everything. All I want is emails to be listed in the order I received them. I DO NOT WANT THREADS

Thunderbird will no longer save sent emails to my SENT folder. I get an error message when I send an e-mail saying, "Your message was sent but a copy was not placed in our sent folder(Sent) due to network or file access errors. You can retry or save the message locally to Local Folders/Sent-using my email address. Cox Communications is my ISP and they say the problem is not theirs.

Just set up Thunderbird - inbox for email account mainly looks fine, except for entries at top of list with only time shown in last column - these are a variety of dates. After that section, my list of inbox messages proper starts. Can I get these initial entries not to display? (or if they have to, why?)

After updating to the most recent version of Thunderbird, I cannot send email using my address of billward@kc.rr.com. I can send email using my address of billward122@gmail.com. When I click Send, I get this message: "Send message error. Sending of the message failed. An error occurred while sending mail. The mail server responded: billward@kc.rr.com sender rejected. The email address you are sending as must match the email address you used to auth. Please check your SMTP settings. AUP#Out-1500. Please verify that your email address is correct in your account settings and try again."

All my account settings, including my email address, are the same as they have always been. The problem with not being able to send emails only started a few days ago. I suspect it is related to the latest automatic update to version 115.4.1(32 bit) or to updates just before this one.

How can I get Thunderbird to let me send emails again the address of billward@kc.rr.com? Thank you.

From David, Top Ten Contributor: "I am trying to assist, but I don't grasp what you are experiencing, since it is not what I think of as threading. You're saying the folder is unthreaded, yet the messages appear threaded by subject. Maybe some other voluhteer on the forum will offer some insight."

All the threading help is oriented to something I can set on the menu bar that also includes Date, From, Size, etc. I wish my threading problem was that easy. Threading is not chosen, never has been. Then suddenly April 2, 2024 6:30pm est, all my e-mails that had a thread got threaded, with arrows showing up in the subject of the e-mails.

There is a symbol on a different bar with choices like Sort By --> Threaded or unthreaded. All this does is hide e-mails that are even threaded or unthreaded, but it shows that what happened to me is also called "threaded." The term "threaded" has two meanings or definitions or uses or whatever, which makes asking for help all the more difficult. People keep telling me about the menu when I have a choice of threading, not realizing, as I think David didn't, that threading is also elsewhere in the thunderbird software.

And when I choose to show threaded, that e-mail I was sending on April 2 does not show up, but if I search for the file, it does show up. So it is there, but invisible. This whole threading situation just gets worse and worse. I need that file in particular, as it happens.

Thanks to anyone who read all this.

As everyone here knows, Thunderbird 115 is a hot mess; sadly, as they cycle through new releases, it sometimes gets worse, not better. It appears from my update history that 115.2.3 was the most stable of the 115 versions. I'd rather go back to 102 but it seems that the profile was modified in 115 so that it is no longer compatible with 102. Thus a 102 rollback might require quite a bit of work to reimport the profile into a clean install. And I have gigabytes of important mail.

I'm not on 115.4.3 and it is close to unusable, as they screwed up regression in a major bug, and my bugzilla on it has sat unanswered, other than requesting I be nice to the devs. So as a lower-risk option might be to roll back from 115.4.3 to 115.2.3. Has anyone tried anything like that, or know the safest way? I don't know what booby traps they've planted to prevent any rollbacks. Thanks!

We have had a longstanding intermittent problem that is gradually getting worse. When sending emails the outgoing SMTP sending happens quickly, but there are massive delays in saving the sent message to IMAP folders.

Often it can take well over 1minute to save a message and quite often it does not save at all eventually we get a timeout with the error "Your message has been sent but a copy cannot be saved".

I appreciate there is the option to save to a local folder but it is a real pain to have to use this all the time.

This delays are happening across several different email accounts hosted with more than one ISP and whilst it is an intermittent problem it is occurring more than 50% of the time across multiple PCs.

Note: We use the option "Place replies in the folder of the message being replied to". However, the problem also arises with new outgoing messages that are not replies that would just be saved in the "Sent" folder.

We are using Thunderbird 115.1.1 (64-bit) running on Windows desktop PCs and laptops.

I have contacted the ISPs concerned but they think it is nothing to do with them and suggest it is an issue with Thunderbird.

I see this has been reported by other Thunderbird users, but the help resposes do not seem to offer a definitive solution. If it really is a problem with the ISP's IMAP hosting, please advise how I can gather evidence to convince the ISPs that they have a server problem. Our broadband speed is good and there are no significant delays with any other internet activity. Thanks.

With the moving of Cox emails to Yahoo would it be feasible for Thunderbird to put an instruction list(with screenshots) of how to get all our TB email accounts from Cox to TB? Do we have to delete all our TB email accounts and re-enter them into TB under the new Yahoo or can we just change the server settings on the existing Cox settings? If just changing server settings what are the settings for the new yahoo? All my accounts are IMAP so if instructions could be made, maybe one for IMAP and one for POP for those who use either. Thank you

My office is running Thunderbird 115. I recently changed the password. This seemed to work OK. But on restarting TB I found the new password had not been stored. The Password Manager display is empty, so I cannot edit anything, nor can I insert a new entry into the Manager. I want to store the current password. How do I do this?

Hi Folks. About a year and a half ago I some how got hacked in communication with a help desk somewhere. From that point on , I have not been able to use my Thunderbird email. It asks for my password that I do not have. I have spent hours trying to reset it. I have tried a clean reinstall, but it recognizes me and asks for my password. I have my email addresses saved and would be happy to do a fresh install, but I have not been able to figure out how to do this. I am very much obliged for any help you may offer. Thanks Tom Adams , [edited] @comcast.net [removed email, phone# and location privacy info from public]

I have 6 email accounts and only 1 is a live.com email. That is the only account that keeps popping up a password error when I open Thunderbird. All settings are same same, full username with @live.com, SSL/TLS,norm pass and so on. Some days no issue grabbing emails ( no password prob ) then starts having issues, and I never changed anything. Any recommendations to resolve?

Upon reopening Thunderbird mail today, I find that the latest update does not allow emails to be opened in a new window with one-click. Clicking on an email launches the message in a new tab instead of a window. Why create a new issue like this? DUMB . . . please fix.