Thunderbird Community Forum

I have been trying to set up Thunderbird Mobile on my Android phone. I scanned the QR code to export my settings. However, when I open the app on my phone, the only options I have are "Add an email account", or "Sign in with Thundermail". The instructions state that clicking on "Get Started" should bring up the option to "Import Settings" but it does not.

I have recently closed my yahoo mail account, removed all traces from Thunderbird, but when I start Thunderbird, after a few seconds, I get a Yahoo sign in screen over the top of Thunderbird

I receive this reply when launching email: "Looks like there’s a problem with this site https://outlook.office.com/owa/ sent back an error. Error code: 401 Unauthorized Check to make sure you’ve typed the website address correctly."

Since yesterday (15 September 2026), my Microsoft Account has not been working properly. I managed to get round the problem by deleting my cookies. Then the update to version 156 was released, and after that Eule became incompatible. When can we expect an update to make it work again? Thanks.

I can not create a new email account for the email : info@ecomtehpro.ro. I have already an email account: office@ecomtehpro.ro. Please give me a solution to create the new email account. Thank you.

Hello fellow Thunderbirds,

I have been using Thunderbird for years and had thousands of emails in quite a few folders, with a shit-tonne of filters etc. My emails were running pretty well. I only use two addresses, but the folders help manage everything.

I just got a new computer last week. Prior to switching over to the new computer I read through the 'Export your Thunderbird Profile' help page, and the 'Move Thunderbird data to a new computer' pages. I've tried to follow all the info there (with a glitch, explained below).

I am using a Windows system and have gone from Win10 to Win11.

I have the following data:

• Mozilla Maintenance Service (in Program Files (x86) ).
• Mozilla Thunderbird (in Program Files (x86) )
• Thunderbird (In Users/Username/AppData/Local/Thunderbird) (Contains 'profile' and 'updates'

I tried to swap the above data into the same spots on the new computer, but alas, it's not working. I *may*, however, have fucked it up myself...

So... When I got the new computer, I immediately downloaded Firefox, but, alas, I entered my email's details before closing it down. It did download a few off the server, but only a day's worth (before I realised I screwed up).

As soon as I realised I'd mucked up, I uninstalled Thunderbird and deleted the files on the new computer (you know how when you download it doesn't always remove all the stuff, so I tried to do this).

I reinstalled Thunderbird, but closed it prior to loading the email addresses on (as instructed). I then transferred all the above data into the corresponding file areas on the new computer. However, everytime I try to run the program it just goes to the standard open screen (with the popup that prompts you to enter your email addresses and details into it - see image, below, in case I'm not explaining it right).

Anyway, I'd appreciate any help you might be able to give me as I'm desperate to get my emails running again and have access to all the saved emails which were in my system. Kindly. Larysa.

Hi, Every time I start Thunderbird from a cold startup, I get the message: Authentication failure while connecting to server outlook.office365.com then.... everything works fine from then on. I can send and receive normally. This can also sometimes happen when I close thunderbird and restart during the day - but not always ! Obviously all the outlook sign-in settings are OK, as it works fine for the rest of the day. Is this known/common/fixable ?

Regards, Paul

Windows 11 (26H2) Thunderbird 156.0 (64-bit)

Anyone know how to use the new setting "mail.addr_book.add_item_default_uri" in 155? The default value is a URI, "jsaddrbook://abook.sqlite", how do I figure out the URI of an alternative? I want to point it to my CardDAV server, do I just set it to the CardDAV URL?

I choose to use POP not IMAP. Yesterday morning, messages downloaded as normal, no problem. Yesterday afternoon, they did not download and I received this message "Unable to write the email to the mailbox. Make sure the file system allows you write privileges, and you have enough disk space to copy the mailbox." I had done nothing at all to my system in the meanwhile, as far as I am aware. I have tried deleting a lot of old emails from my inbox, and emptying the 'Deleted' folder. Any suggestions very welcome.

I'm trying to remove a couple accounts that I no longer use in Thunderbird. A window keeps popping up asking for a password, but the mail service is no longer available. When I click on the red delete button for that account, nothing happens. I've deleted all the mail in one of them which I was able to do as I thought I might need to do that first, but I still can't delete it after that. The other one won't even let me delete the emails. How do I delete these so I stop getting asked to put in a password for accounts that are no longer valid and I don't want anymore?

I am trying to migrate from Microsoft Outlook 2021 to Mozilla Thunderbird. I have successfully imported the email from a number of different email accounts. I would now like to import the archived emails held in a number of PST files. The import tool would seem to be what is required, but it does not seem to allow me to select the PST files that I wish to import. I am concerned that it will try to import all email messages from my Outlook 2021. Is there a way of restricting it to just individual PST files?

This morning, my email Inbox is empty. I use Thunderbird for four email accounts, and three of them are fine, but the fourth one has an empty Inbox this morning. I didn't (intentionally, anyway) move the emails anywhere, and they do appear to be in the All Mail folder, so I didn't lose them entirely. But I keep my emails mostly in my Inbox and they aren't there anymore.

Any ideas what happened to make them disappear and how I can get them back to the Inbox?

Thanks!

I created a POP3 account, and no SMTP config was crested in Thunderbird. So, I tried the Add option and after filling the form the line still did not get created. Current TB version, Win 11 Pro. I have several other accounts that configured OK, all Spectrum.

For the past several months the saved passwords, for my Comcast account, have had to be reset. When viewed the password vault still shows the old but correct password. It happens after a restart required for a Windows Update. I put in a dummy password, reboot, put the original password, reboot and I'm back and working as it was in the past.

Isn't password manager suppose to save the password until changed or deleted? It had in the past!