Thunderbird Support Forum

My Thunderbird Version: 115.12.2 (32 Bit)

Microsoft is changing the authentication method for outlook mail to OAuth2. I follow the guide here,

https://support.mozilla.org/en-US/kb/microsoft-oauth-authentication-and-thunderbird-202

And I get to this screen - but my version of the program does not have OAuth2 as an option (see attached image).

Thanks for the help.

Hello, i try to customise the thunderbird mail colors, but can't find any settings to that. I want to change the colors for "marked as -> unread" messages and the color for new received messages. Can anyone tell me how to adjust this? I tried to add the "userChrome.css" file in the self created folder "chrome" in my profile directory, but nothing changed. Can someone help me? I use Ubuntu 22.04.4 LTS version and the thunderbird version 115.6.0.

Hello, When sending a message from my gmail account within TB, I would like to automatically attach one of my other adresses as bcc: . How can I do that ?

As an alternative, is there a way to automatically copy the message in my sent folder in my gmail account to my local sent folder ? Using a filter perhaps , but I have been unable to create a filter that operates on the Sent folder.

Thank you, Alain Damlamian

I've been accessing ATT.net along with gmail.com for years now. Every once in a while, ATT don't accept my login password? Error message reads: "Login to server inbound.att.net with username pennsynut@att.net failed." And when I "enter new password" with the password from ATT.net, it still don't accept it. I vaguely remember doing something with ATT.net years ago. But why does it keep doing this "login failed"? I ask because if I wait a day, it will re-insert itself. When I check passwords in TB for ATT.net. All it shows is "mailboxc//(mailbox://). The gmails show smtp, imap & oath. But ATT only shows that one. ? How do I get the other passwords in there?

I have a verizon.net email account at AOL. AOL now requires use of a one-time-use "app password" to sign in from Thunderbird. This does work but it seems like now I will have to go through this process (going to AOL web mail and requesting a new app password) every time I reboot my computer or restart Thunderbird. Is this true?

On my old small laptop I wanted to increase interface font size. Erroneously thought that in layout.css.devPixelsPerPx I could insert the desired font size. I have inserted 12, now Thunderbird is unusable, some giant menu words appear but I cannot move anywhere. Can I I edit a configuration file manually to reset to a readable size? Which?

As described in [question] I am unable to install addons in Thunderbird: when attempting to install an addon, either via the in-app browser or via a file, a pop-up window appears for which "Add" and "Cancel" buttons do nothing (there is no way to move or remove the window without killing the process).

I am opening this question as this problem still persists over a year and many versions later.

Thunderbird V. 115.11.1-1 on 6.9.3-arch1-1 with Sway WM

I have a notice in the bottom right of my Thunderbird screen stating 103mb of 110mb IMAP total (93%) has been used.

I presume there will be consequences should this reach 100%!

My mail server is showing no issues of quotas being reached.

Is this an issue that relates to Thunderbird quotas?

Can anyone advise how I can reduce the 103mb total that is being shown?

Many thanks in advance.

Thunderbird version 115.12.2

How can we keep the month calendar visible in the Today Pane?

The option mentioned here seems gone: https://support.mozilla.org/en-US/questions/1420812

I have just altered my Hotmail settings in Thunderbird to take account of the Microsoft OAuth2 requirements. I can still send from Hotmail but cannot receive (download) incoming messages.

When I open Thunderbird, or check for email, I see the text "******@hotmail.com: Host contacted, sending login information......." at the bottom but no messages are downloaded, and eventually the text disappears (I know there are messages waiting as I can see them using the Outlook app)

My server settings are; Server type : POP Mail Server Server name: pop-mail.outlook.com Port: 995 User name: ******@hotmail.com Connection security: SSL/TLS Authentication method: OAuth2

I have tried restarting both my PC (Windows 10) and Thunderbird, but the problem persists. Help please!

I've been using Thunderbird for many years with no issues. I opened it today on my laptop and all my accounts, settings, emails, calendar items, etc. are gone. It's asking me to set up an account. I have years worth of saved emails from 4 different accounts and they are all gone. How can I get them back. I am using Windows 10.

I would like to change my account settings for my hotmail account, but when I try to change from Normal Password under Outgoing Server (SMTP) there is no option for Oauth. Is there something I can do to enable this option.

My Local Inbox suddenly started to arrange itself by group according to correspondent. I can't get the emails back into chronological order. I can't work with a mail program that doesn't give me my messages in chronological order, with most recent at the bottom. If I did something to cause this change, please tell me how to undo it. I have about eight email addresses, and they all feed mail into the Local Inbox.

I was getting warnings from my e-mail server that I was near the mailbox size limit, and Thunderbird displayed a percentage bar in the lower right corner. I've deleted a lot of large messages and want to see how far I am from the limit now, but now the bar isn't displayed. Is there a way to refresh this? Or is it a warning that's only pushed from the server?

(Unfortunately, my webmail site doesn't compute the size correctly and shows me at over 400%, so I can't see the actual size there until the server sends me another warning.)

A long-standing university email account that I accessed through Thunderbird was recently mistakenly deleted by the institutional administrator and all its contents deleted. The institution subsequently established a replacement email account for me, but the institutional Help Desk said the emails from the original account had been erased and could no longer be accessed from their server. Fortunately, I had Thunderbird configured to save all my emails on my local machine, so that even though I can no longer log in to the original email account, I can still view the emails in my Thunderbird installation (i.e., open and read them), even though every instance of starting up Thunderbird calls for me to supply the password for the original account (which I can no longer do). So I just close that dialogue box and can still see the emails stored locally on my machine.

I would like to move (or copy) these emails to a location where I can still access them off line and view them in the original organizational scheme (if possible), under the headings "subject," "correspondents," and "Date." But the Thunderbird "archive" feature seems to require that I be able to log on to the institutional server under the original account, which I can no longer do. The only existence of these emails is on my local computer.

Is there a way for me to preserve these emails as an accessible archive/repository so that I can continue having access to them, even though they are no longer in a functioning email account?

Thanks for any suggestions/help.

when clicking an email link this is shown

"Thunderbird is already running, but is not responding. To use Thunderbird, you must first close the existing Thunderbird process, restart your device, or use a different profile."

How do I make Thunderbird instead open a new email?

This is on Fedora

I'm trying to read some old emails in an account from around 20 years ago that I have kept in Thunderbird the entire time. I stopped using the account, but kept it configured as it always had been with the old email saved in it. The emails are in several folders in Thunderbird, and I can see them listed when I select a folder, but the content of most of them is now invisible. For many years I upgraded Thunderbird and they remained visible, and I naively assumed that would always be the case. I think the visibility problem happened after a Thunderbird upgrade sometime within the last few years. Strangely, a few emails are readable. I think they're the last ones I viewed before I became unable to see additional ones I select to view. I believe all the data is still there, but I don't know how to read it. In the file system, here's what my Thunderbird profile Mail directory looks like:

/Users/myMacUser/Library/Thunderbird/Profiles/my-random.default/Mail account.server.name - TB Email Folder 1.sbd (empty directory) - TB Email Folder 1 (no file extension, apparently the file containing the email data. File sizes suggest they contain data) - TB Email Folder 1.msf (the index file, apparently readable) etc.

I'm using Thunderbird 115.12.2 on MacOS Sonoma 14.5. I tried several types of exports with the ImportExportTools NG extension, but it just exported zero byte or blank files for the invisible emails.

How do I read these folder data files?