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I have two Yahoo email addresses 0 d6a.... and den2....

Both are set up in Thunderbird

However, in Thunderbird, both addresses show the email/folder data associated with the den2... address!

No emails for the d6a... address load to Thunderbird.

Separate data appears for each email address on the Yahoo web pages.

I have ended up with five different calendars. They all have different names--probably because I really don't understand how Thunderbird organizes things in regard to the rest of the internet. Several people in our household share calendars, to keep track of events, tasks due, and medications.

So how do I consolidate all the entries in all of these calendars? I have tried syncing, but that doesn't seem to work. How can I know that when I enter a soccer schedule on (one of) my calendars, it will end up on the calendar that my wife uses to print out our family weekly schedule?

I copy/paste emails a lot for my job, which needs to include from, sent, to, cc, bcc, and subject:

From: Sender <sender@email.com>; Sent: Wednesday, January 21, 2026 at 11:27 AM EST To: John Doe <johndoe@email.com>; Cc: Jane Doe <janedoe@email.com>; Bcc: Subject: Email Subject

Currently, I am using the plugin ReplyWithHeader, which will produce this style of header on reply/forward, but is there a way to display this in the email body on view, without me having to reply/forward to produce the headers in the email body?

Thunderbird has become crazy slow. 5-10 minutes to display an email. It's not my email server because my phone connects to and displays email fast. I have been through all the advice that I can find and cleared, checked, disabled everything that might slow it down. Still crazy slow. If I kill it and restart, I get about 3-4 minutes of reasonable performance and then it just stops. Latest Release Version V147.0.1.

i have a fast machine with 32Gb memory only 60% used, everything else runs fast

I don't want to junk Thunderbird, but it's unusable.

Help!

I inadvertently deleted a mail sub folder named Shopping Oder Confirmations I found the folder in my acronis backup and copied it to my desktop I then pasted it in to the profile window of thunderbird in hopes that when i restarted it would show up in my mail folders which it did not I can send you screen shots of the different windows where I dropped the folder Can you help please?! There is tons of information in these folders I reference often. Thank you! BTW I did just make a donation :)

Bonjour Depuis qlqs temps j'ai un dossier Envoyé et Sent message Je souhaite supprimer le dossier Sent message et je n'y arrive pas Comment faire ? Salutations

I have been using Thunderbird for quite a few years and all of the sudden I have been receiving the message below yesterday and it's still continuing with this error:

Connection to sever imap.gmail.com timed out

I have not changed any settings Tried all the different suggestions found online (checking port numbers, taking off anti virus, worked in troubleshoot mode, even un-installed Thunderbird and then re-installed, etc)

The problem is still happening. Not sure if anything was changed on the back end of Thunderbird but I cannot receive or send emails at this point.

Please advise. Thanks!

My old computer crashed and I have gotten a new computer. It's a Dell All-in-One. So anyway my question is how do I get my email to cross over to my new computer? Also we had LocalTel for a short time and my email and information went through them. My email address was Lorirn@ifiber.tv, they closed the ifiber.tv email system but was still managing it. So when my computer crashed somehow they knew about it and cancelled my email and closed everything. So now I can't get my emails that I had, which was a lot of them. Some were very important to me. I am in a very bad situation. I am hoping that you can help me somehow. I did try your transfer Thunderbird Profile Files and I don't think that I did that right. I have downloaded Thunderbird to my new computer. So I need lots of help from you if at all possible. I am hoping with fingers crossed. I have had to change my email to Lorirn5755@gmail.com, let me know if more info is needed.

Thanx in advance Lori Bolin

I have found a complete folder with subfolders in my Trash at last three or four times now, and I did not move it there. The folders are still in Local Folders but they are empty and I have to move everything back. Why is this happening? Just in the last six months has this occurred.

I have Thunderbird 142-esr on a Windows 11 computer with two users in separate Windows users account. The second user (my wife) suddenly had her gmail login stop working on TB, even though it continued working on all other devices. The symptom was that the inbox would hang trying to log on to gmail, although no error messages appeared.

My account worked normally throughout this time.

After trying less destructive fixes such as closing the application, logging off, and restarting Windows, I guessed there was an issue with her account, possibly a corrupted file. So I deleted her gmail account. When I tried to create a new account, TB accepted her credentials and the Google login came up. I successfully authenticated to Google, but installation failed when I returned to the TB new account screen. After a long wait, TB issued an error message saying the password or user name was bad.

I did two tests to isolate the problem. First, I attempted to install my wife's gmail account in my Windows TB instance. That failed in the same way. Second, I attempted to install my gmail account on her Windows instance. That worked. I concluded there was nothing wrong with her instance of TB. I thought it might be an issue with her password, although Google has never asked her to change it, and there haven't been issues logging on outside of TB. Her password did not meet Google's current requirements, so I changed it to 12 characters, mixture of upper/lower case, numerals, and special characters. That worked.

Unfortunately, during the process, I lost her settings, and it took a while to recover them from backup media.

I'm posting this more to ask if others have experienced such a problem than as a request for help, as I think the underlying issue is now resolved. Because it may be some kind of malignant interaction between TB and gmail, I thought it might be worth reporting as well.

While checking mail in my inbox, I opened, then deleted a message (message 1). As has been happening lately, there was a significant pause between my hitting delete and the mesage going away. Then I opened another message (message 2), and I found that it had the header for message 2 displayed in the inbox, but showed the text of message 1 when opened. Scrambled messages and headers could be a big problem.

I logged onto the mail server (gmail) directly. It showed me message 2 with the correct header, and message 1 was in trash.

To fix the problem, I deleted message 2 on the server, and waited for it to vanish from the headers in my Thunderbird inbox. Then, I copied it back from trash on the server. After it downloaded to Thunderbird, everything was fine, but I wanted to alert you to the issue. Something evidently can go awry on TB's end to scramble headers and messages, and that is scary.

Running TB 147.0.1 with gmail(imap) as the mail server. I have posted twice in the past week about issues with gmail, and I am suspecting something going on at that end. My TB installation is brand new since then; the problems with logging on and staying connected that I reported only went away when I removed .esr, rebooted, and did a clean install of TB.

Please advise if this is a known problem, and if there are settings I can tweak to prevent recurrence.

This just started 4 or 5 days ago ( 2026.1.23 ish). I did not update TB nor make any changes to the account in question (that I'm aware of). The errors show up every few minutes, with a 'beep' sound and notification pop-up showing up each time - is very annoying.

I was running v145 when it started. I saw there was an update to 147 and installed that; same issue. I restarted TB into Troubleshooting mode and am still getting the error.

This is running on MacOS 15.7.3. Hardware is MacMini (2024) with Apple M4 chip.

Generally I still seem able to received & send emails.

I opened Activity Manager and Error Console. Error console doesn't seem to have much (using 'Multiprocess', with Errors, Warnings, Logs, Debug enabled). Activity manager shows things such as:

<my account name>

   Connection to server outlook.office365.com was interrupted.    09:49
   Failed to connect to server outlook.office365.com.    09:52
   Authentication failure while connecting to server outlook.office365.com.    09:58
   Authentication failure while connecting to server outlook.office365.com.    10:03
   Connection to server outlook.office365.com was interrupted.    10:10
   Connection to server outlook.office365.com was interrupted.    10:14
   Connection to server outlook.office365.com was interrupted.    10:20

There was an error or log entry that I was able to find a few days ago that made me think it was Calendar related, but now I'm not finding that message.

I have recently installed 140.7.1esr (64-bit) on Windows 11

1. It keeps asking for my account password, I always check the box for saving to the password manager, with no effect, I still have to type it in every single time. (I did set up pwd manager and I do have a master pwd)

2. Initially I had Thunderbird pick up my Gmail account as well, but it stopped picking up my Gmail for some reason. So I completely deleted my Gmail account in Thunderbird. yet it persistently asks for access to Gmail every 15 minutes. (I get a notification from Gmail saying that Tbird is asking for access to Gmail). The Gmail account no longer exists in Tbird, does not show up in the menu, and it does not download anything from Gmail if I give it permissions.

One of my 2 Tbird accounts will download a new message but not display the contents. In the inbox list the message remains bolded, and clicking on it won't display the contents or unbold it. Any suggestions? Tkans, Alan

I used to have Windows 10 and was using Thunderbird with Quickbooks POS 18 and if I wanted to send an email in Quickbooks like a purchase order or receipt, it would open up a mailto window in Thunderbird with no issue. I've moved to a Windows 11 computer with the same profile running a 32bit version of Thunderbird, set as my Windows default mail client, even in the registry I've set it there but Quickbooks says I don't have a default email client setup. I've exhausted every search over the internet trying to fix it. Any ideas?

When I try and "Compact" my trash folder, I get the following error message: "The folder 'Trash on redacted@gmail.com' could not be compacted because writing to folder failed. Verify that you have enough disk space, and that you have write privileges to the file system, then try again."

There is plenty of disk space, but there is no option for "write privileges". The trash folder has grown to 632 MgB even though I keep deleting old messages from the trash folder!

In previous Thunderbird versions, when you subscribed to a RSS-Feed that required authorization, Thunderbird prompted for it, just as a Webbrowser would.

I'd enter the username and password, tick the box "Save in Password manager" (or something) and the feed would come in.

I don't know when that changed, but nowadays Thunderbird just says "Feed is unautorized". No password prompt, no possibility to mark a feed as "requires Authentication".

I know I could pass username and password in the URL, but that is rather unsafe compared to saving the password in password manager protected with a primary password.

It seems that there were some bug reports some 21 years ago about the same issue, so maybe this is a regression?

Changing color of the text during composing an email does not work when I use "Choose a color" button. The color in the button changes, but when I click "Ok" the color does not change. The color change works though if: I click "Last-picked color", or when I type color name "Green" or HTML hex, and subsequently click "OK".

How to change the color of text in a composed email when

I am using Thuderbird on macOS.

When trying to run in Safe Mode, and compose a new message, I the Thunderbird stucks, so I cannot confirm in Safe Mode, but I had this issue in the past also on other machines/Thunderbird instances, so maybe someone else had a similar problem, or maybe it is a known issue, already in dev team logs.