Thunderbird Support Forum

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!

Hi, A couple of weeks ago the Mozilla Thunderdirb I have installed on my laptop had an update. Since then the programme does not start. How can I fix this issues? Thank yuo in advance, George

I just recently downloaded Thunderbird after using Mac Mail for years. Mail suddenly refused to display messages and no one on the Apple forum could figure out why. So I was advised to download Thunderbird. So far, I'm not a fan. Here are my issues: 1. Unread messages in the Inbox are in bold. But the bold is so close to the normal font that I can't tell them apart. Is there another, better way to mark unread messages? A tick/check mark? A coloured background? 2. Messages are automatically organised into conversations. But when the latest message comes in, the inbox message doesn't go bold. So there is no way of knowing where to find it. I have to go through all messages that have a conversation (more than one message in the inbox) and find one where the latest message is in bold at the bottom. It's a royal pain. I see the number next to the account on the left, but nothing is in bold on the right. Grrr. 3. The conversations are the wrong way up. I want the most recent message at the top, not the bottom. I would actually prefer not to have them in conversations at all, just the most recent message, but I realise that is probably asking too much. 4. There is no number next to the Thunderbird icon on my desktop when I get a message. I used to appreciate this in Mail. It told me if it was worth going to my inbox. With Thunderbird I have to open the program to find out. Ok, that's enough for now. I'd better not get started on the shortcomings of the search function, or how to bring the unread messages to the top of the inbox list... There are just too many issues to address is one posting. Thanks for any help you can give.

I upgraded to Thunderbird 115.10.0 (x64) earlier today and now the program is no longer closing completely (I've tried using the X at the top right of the window, and I've also tried File menu -> Exit). I first discovered this when I was using CCleaner to clean my temporary items and it asked me if I wanted to close Thunderbird after I had already closed it. I then checked my running processes and there are three Thunderbird processes that remain after the program has supposedy closed (Task Manager screenshot attached).

Any help with this seemingly new bug is greatly appreciated!

Much thanks, -Snipe

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.

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.

The last couple of days emails from one particular adress (mail send from or generated in our membershipsystem) have started to disapear from my inbox.

I'm not aware that any updates have been done since when it worked.

The mail shows in the inbox for maybe 5-10 sec and then puff without me doing anything or if I click away from inbox and back it's gone

I have checked my spam, the trash and my filters and I have done a search. Even ended up deleting my filters, to be sure.

I have made sure the email adress is not on any spam list. I even tried to make a filter where it would copy the mail to another folder to see if it would stay there (it didn't get copied).

The mail is also gone when I check directly on the webmail with my mail provider.

On my thunderbird I have three different email accounts from the same email provider. I tried sending the same mail to two of my accounts at the same time form this particular emailadress (I can acces the membershipsystem and send / generate mails from there). The mail was recieved and stayed on one account but not the other.

I'm running out of things to try - please help me.

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.

Hello there! Please can someone help me? On my pc, lately, when I move an email from my Thunderbird Inbox to a folder, the message does 'go' from my Inbox, but it does not re-appear in the folder. In fact, the message seems to disappear! However, the message tally count for that folder indicates that the message should be there, but it isn't visible. It's obviously been happening for a while but I don't know when it will have started. In the attached image, the folder 'Chatham, Cape Cod' shows that it should have 10 messages in it, but you'll see that the folder is empty, no messages are showing. In fact, all of the 3 folders 1) Boston, 2) Chatham, Cape Cod, and 3) Virgin Atlantic show that they have messages in them, but on opening each folder, each of those folders is empty. I should add that, on my phone or ipad, when I view my folders, all of the messages are visible. It is just on my PC that the messages are not visible. I've uninstalled Thunderbird and reinstalled it, but that didn't help. And I don't know what else to do! I'd be so grateful for help as I'm not techy and, as I work mainly from my PC, it's proving to be difficult not having all of my messages visible in their folders on my PC. Fingers x'd someone has a solution! Many thanks.

I have two computers, one older with TB 115.9.0 32 bit, pop. The other has 115.9.0 64 bit, imap, same email address. I have tried to merge them, but when i do the Thunderbird Import folder has zero messages and no subfolders. I also tried changing the old TB to IMAP, didnt work: "configuration problem". Any help would be appreciated.

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.

We have been using Thunderbird with a Cox email account. Cox has just transferred all its customers to Yahoo. I want to use Thunderbird with Yahoo. How do I set that up?

Ubuntu 18.04.6 LTS and Thunderbird 102.11.0 (64bit) Archives in TB show 2021 and 2024 only but both are empty Archives.sbd contains 4 files: 1) 2021 (empty), 2) 2021.msf, 3) 2024 (apparently all missing emails are dumped here, but not in clear readable format) and 4) 2024.msf I did not intentionally archive the files; could be by accident clicking "A" but unlikely that I accidentally also had selected app. 3,000 emails. App. 60 mails were left (i.e. not archived) in inbox Tried to archive one file afterwards from inbox. OK, went correct to 2024 in the same folder as all the others. However, this mail was visible in Archives, 2024 in TB. I moved it back to inbox without any problem but strangely it still also is in Archives.sbd, 2024! HOW CAN I GET THE EMAILS (app. 3,000) FROM Archives.sbd, 2024 BACK TO TB?

Trying to delete an email account that is no longer used. System continues to attempt to read from the provider because I cannot remove the account and is delivering error messages every few minutes which is very annoying.

I've gone through Account settings>Remove account>Confirm remove BUT the only active option is Cancel. The Remove and More Info buttons are greyed out.

How do I migrate the old Thunderbird profile to the new Thunderbird? Background: Up until mid-Jan 2024 I was using Thunderbird on Windows 7. In mid-Jan I did a "clean" install of Windows and installed Thunderbird. Due to a corrupted Windows installation, I had to do another "clean" install of Windows 10 Pro. Today I installed Thunderbird version 115.9.0. Everything went well. However, I don't have access to my old - pre-mid Jan profile - which has e-mails and contacts I need to access. Here's my setup: Thunderbird installed in D:\Thunderbird New Thunderbird profile is in M:\Thunderbird Old Thunderbird profile is in M:\Thunderbird-OLD

How do I migrate/import the old messages, address book/contacts, and find out which extension I had installed?

Thanks.