Thunderbird Support Forum

Along with most of the world, I hate threads. My normal practice is to keep only the last email in a thread quoting all the contributions, and to delete the rest. Then I have one email with everything about that in it, with a history trail. I've done this for years and years. Then, some time last year, after an update of Thunderbird, everything was in threads. Someone replies to my message, and the thread goes missing from Sent, and appears in Inbox, but not marked as unread - you only see this when you expand the thread. If you reply, it jumps back into Sent. Finding anything is now a time-consuming nightmare. But there also appears to be at least one bug.

Suppose I now go into a thread and delete an intervening email. Thunderbird clears the preview panel of emails. If I click on Sent then back in Inbox, they reappear! But if I'm now confused as to exactly what that delete did to how many emails, I click Edit / Undo Delete. What it seemed to do tonight when I hit the Delete was get rid of a big chunk of the large thread, including some emails I hadn't read yet, and some not in this or other threads! They are not in the Deleted folder - they are gone! I think it has also done this before. What a mess! As for evidence, reproducing it is not something I want to do.

As of this morning, I'm unable to click on links in emails and have the URL open in my default browser. When I click such a link, the menu bar darkens as the mouse button is down, and lightens when the mouse button is released. Nothing else seems to happen.

I hope you can help; this is a major problem.

Yesterday I downloaded Thunderbird to Windows 10 (64-bit), added my Office 365 (for work or school) account, rocketmail account and iCloud account. I created unified folders for the three accounts. I have downloaded the TBSync add-on with the required CavDev (?) one to connect my iCloud calendar.

After successful use the first few times, now Thunderbird becomes unresponsive within 5 seconds of opening, every time, rendering the program unusable.

Troubleshooting mode does not fix the problem, so I assume it's not the add-ons, nor does starting my PC in Safe Mode (F4 at startup ie no networking), so I assume it's not antivirus.

I uninstalled Thunderbird and re-installed from the website today. All my accounts were there (so I wonder if the uninstall didn't work properly, although I assume that it's just the files left on my computer that the new Thunderbird installation is accessing).

All these attempted fixes leave the problem unchanged: the window freezing within seconds of opening.

Because the program becomes listed as 'not responding' and greys out on further clicks, I have to hard-close the program using Windows, selecting 'Close the progam'. Clicking 'Wait for the program to respond' leaves the screen greyed out, and nothing changes for at least 20 minutes (the maximum I've tried waiting it out). This also means that it does not yield a formal crash report, because Thunderbird does not recognise it has crashed.

On one occasion it did create a crash report, which I submitted. I am not sure what behaviour allowed this to happen, and I have been unable to reproduce it. That particular crash ID was as follows:

Crash ID: bp-41096385-eebe-4ccc-a47e-f76300240417

Any help much appreciated! I'd love to stick with Thunderbird if possible.

MacOS Sonoma 14.4 seems to have broken a number of apps. AFter updating to Sonoma 14.4 I experienced a great number of crashes with Thunderbird, so I completely uninstalled Thunderbird and removed all traces of plists, Application preferences, everything, reinstalled Thunderbird, and added back the two email accounts I use with it.

It now takes up to 30 seconds to start up Thunderbird, after which it happily no longer crashes, but obviously the startup time is unacceptable. I experience the same problem with Typora, and the developers there informed me that they believe the problem is with a Sonoma change that broke WebKit. I don't know if Thunderbird still uses Gecko or if the new version is WebKit. Please let me know if other Sonoma users have reported this problem or if it's just my system.

I have had good success with Thunderbird until this morning when, posting a second email with photos to my wife, I got the message that the server connection timed out. I called my email internet provider locally, suggested to uninstall and reinstall, to check configuration. None of that worked. I modified one setting, the name of the outgoing server, when I checked with the protocols provided by the email/internet local provider. That also didn't help. I'm at a loss.

Thanks if you can help.

I have been using T-bird as my email client for years. Just now, a new screen pops up with this message: "an error occurred during connection to localhost". I have 2 email accounts that I use with T-bird. The one is with comcast; it is the account that comes up with the error message. The other account is with Breezeline, and it appears to be unaffected. However, and this is the problem, I cannot send or receive email from either account. I am going to try to send both a hard copy of the error message, and the data from the T-bird program that I am using. Your help is appreciated. Thanks

As of a few months ago, I have been running into situations where my local folders wind up displaying some entries with no title, no sender, and garbled content (see image). Attempting to Repair the local folders does not have any visible effect.

Server is Microsoft Outlook, connected to via SMAP. I'm running Thunderbird 115.9.0 (64-bit) on Windows 10.

I'm also connecting to this mail server with Microsoft's android client, but that obviously doesn't know anything about the local folders so it shouldn't (?) be interfering.

This is Seriously Annoying. If I put something into the local folders, it's because I want to archive it for reference. That needs to be reliable.

Time for me to abandon Thunderbird? Or is this a known issue with a reliable fix?

After the last couple of Thunderbird updates, I have been experiencing a really frustrating issue that I can't seem to resolve.

Only when I receive emails from one specific recipient and I go to reply to them, the font size is suddenly really large, and the spacing between new lines is huge.

Even if I set the font options to the same as if I was replying to a different recipient or creating a new message, it still appears really large.

What's worse is even if I make all these adjustments and get the font size and formatting looking okay, the actual sent message is even more out of whack and has all these spacing problems.

Does anyone know what might be going on? No other mail client I use experiences this issue whatsoever, and this issue is only occuring with this recipient.

If you give me an email address I will send you the screenshot of my error message.

Or, call me NOW at [removed from public support forum]

Thank You. Marty Straka

My sent messages are not being saved-error message says current command did not succeed. The mail server for plvltodd@cox.net responded TRYCREATE mailbox doesn't exist Sent .001 + .000secs

When I search with TB it is not finding all the results.

This is especially frustrating because the main reason I started using TB is because the search on my host's webmail is abysmal. But it turns out that TB search (for me) is even more abysmal.

I am sure this is happening because something is wrong but I don't know how to go about fixing it. I have already rebuilt the global database but that did not fix it. However, the new global database file is about half the size it was before I rebuilt it.

Is there anything else I can do?

Since the latest upgrade to 115.10.1 (64-bit) I have an issue about running Thunderbird.

From a clean Windows 11 start up it is OK but then if I then Exit and then try to run the bird again it does not start.

Digging around I discovered using Task Manager, a number of Thunderbird processes run after I had Exited. See attached.

Any thoughts?

For months I was experiencing the problem of "Thunderbird not responding" occasionally. It was a short duration issue (a few seconds to a minute). I reinstalled Thunderbird several times without success. I read almost every comment available online about this problem and I tried many ideas and recommendations I found without success. Most recently the problem became so serious that it was not a nuisance any longer. It was nearly impossble to work waiting for minutes to open an email or to continue typing while preparing a message and being interrupted by the problem I am describing. I ran Thunderbird in safe mode and determined that none of the add-ons is causing the problem. I turned the firewall OFF and determined that firewall was not causing the problem. I then decided to run Thunderbird in Offline mode and found that the program works normally. Then while in Offline mode I decided to download more messages and the program asked me if I wanted to switch to the Online mode. I said yes. New emails were downloaded and without going back to the Offline mode I was able to work normally without any occurrence of the "Thunderbird not responding" problem. I have been using this workaround for several days now. I download a number of eamails. I try working in Online mode and I cannot do it. I switch to Offline and work fine. I switch back to Online mode and I don't see the problem any longer for the whole day. Do you have any idea as to the origin of my proble? I am running Thunderbird 115.10.2 64 bit on Windows 11. I had the problem originally using Lenovo T490s and more recenlt Lenovo X1 Yoga

Good morning, This morning thunderbird was not responding and allowing new emails to come thro. So i repaired the folder and now it doesn't display the messages in my inbox. Could someone help me with that? If you want to message me privately thats fine too daryl@doubledtrailerparts.com