Thunderbird Community Forum

This just started yesterday: When I open thunderbird my inbox does not show up unless there is a new unread email in it. Also my previously set display columns and tool bar all have to be reset each time I open Thunderbird.

I am trying to get my Address Book(s) off an old PC that barely has any resolution. I cannot locate any MAB files, only SQLITE files (abook, etc.). What is the file that the address book is found in?

I followed the instructions in the aritcle on the search page and it still didn't work. I worked with Geek Squad. They completely did all kinds of different settings and they all failed. When I click the test button, it says it connects successfully.

It tells me to retry or update the password.

I am absolutley typing in the correct password.

When I open thunderbird, the inbox say "No Messages". I then go to "File" and then "Get new messages for" account. Some times it takes several tries before all my messages (New and Old) appear in my inbox. Also, each time I open Thunderbird, I have to reset my columns.

I use Thunderbird 159.0 (64-Bit), german version, on Windows 11. I have integrated as well 2 local calendars as well as 3 calendars maintained on my synology disk station. Today I have noticed that Thunderbird Calendar does not work anymore: I do not see my calendars (the calendar sheet is empty) and the tool does not react neither on the calendar options (the three dots ...) nor on add calendar ("Kalender hinzufügen"). Is it possible to reset or de-installate the calendar tool? Or to delete an re-add the calendars?

(The calendars on my disk stations work fine on the disk station and are still accessible with Android Business Calender.)

Love Thunderbird - thanks!

Can't seem to find what folder an email is in doing a search. The list of results doesn't show it and can't see it in the email. Maybe missing something. I sort emails by folders so not knowing the folder makes it hard to find what folder it is in (such as I may want to move that email).

Jim

I need assistance with a persistent Microsoft 365 authentication problem in Thunderbird on Windows 11.

My business email is hosted through GoDaddy's Microsoft 365 service. Thunderbird repeatedly fails when attempting to send messages, displaying:

"Login to server smtp.office365.com with username [business email address] failed."

We have attempted to troubleshoot this problem on several occasions without achieving a reliable solution.

Previous troubleshooting has included checking SMTP settings, STARTTLS, OAuth2 authentication and investigating Microsoft Graph integration.

Our earlier investigation also indicated that SMTP AUTH may be disabled for the Microsoft 365 account.

The mailbox works through Microsoft Outlook, but having to remember to use Outlook separately creates a risk of missing time-sensitive business correspondence.

I would particularly appreciate assistance with the following:

1. Establishing a reliable, supported connection between Thunderbird and my GoDaddy-managed Microsoft 365 mailbox. 2. Determining whether Microsoft Graph integration can resolve this without enabling legacy SMTP authentication. 3. Identifying any known compatibility issues involving GoDaddy-managed Microsoft 365 accounts. 4. Providing specific diagnostic instructions so we can establish why authentication is failing rather than repeating unsuccessful configuration changes.

I can provide screenshots, Thunderbird version information and diagnostic logs with sensitive information removed.

I would be grateful for detailed technical guidance because repeated attempts to resolve this issue have been unsuccessful.

I've used Thunderbird on a pc for decades, love it. Today when I opened it, the 'top level' of folders is entirely missing, it shows only Local folders. I've checked that 'Folder Modes' is set to All Folders, and now I don't know what else to try. Any advice greatly welcomed, I'm struggling to get work done using webmail or phone!

Hello! I'm having a problem where a specific tag keeps un-applying itself. I have a number of filters that look for specific words in emails, and tag them accordingly -- all of my other filters are working just fine, but one specific one has decided to stop working. It has exactly the same settings as the other ones, and when I manually run the filter, it correctly applies the right tag.

But, minutes later, the tag will un-apply itself, and I cannot figure out why. For some reason, an older message is staying correctly tagged with that filter, but newer ones un-apply the tag. This same filter and tag used to work just fine. Other tags on emails from the same source work fine, too.

Auf der Öffnungsseite erscheint normalerweise links ein schmaler Streifen mit den ganzen Ordnern, wie Posteingang, gesendet usw. mit der jeweiligen Anzahl der E-Mails. Im übrigen Feld rechts daneben sind alle E-Mails einzeln aufgeführt. Jetzt erscheint manchmal auf der Öffnungsseite eine andere Ansicht, ähnlich wie die Konteneinstellungen. Mit mehreren Versuchen kreuz und quer gelingt es dann wieder die normale Ansicht zu erhalten. Vermutlich habe ich mal irgendeine falsche Taste gedrückt, so daß sich die Ansicht plötzlich geändert hat. Könnte sich das Problem lösen, wenn ich Thunderbird neu installiere oder gibt es eine einfachere Lösung?

Hello My previous computer has crashed. C:/ is not available any more. In my previous computer, I had two hard drives: a C:/-drive (an SSD) where Windows and other software were installed, The second hard drive was a conventional drive (D:/) where I stored all my files, documents, images, and so on. On this d:/ I also had several programs installed including Thunderbird. On that previous computer, I saved and organized my emails into subfolders within Thunderbird.

Is it possible to recover my address book in Thunderbird? Is it possible to find/recover my saved emails? Could they perhaps be saved somewhere on my previous C: or D: drives?

I have an old copy of my C: and D: from 2025 I have also a complete copy of my D: from my old computer.

I have now bought a new computer and installed Thunderbird. I would be very grateful if this could be resolved. Kind regards Anders Quant

My Thunderbird installation (159.0/Windows11) has evidently just updated, and my Calendar tab is suddenly a complete blank space. There's a support article here that appears to discuss exactly this situation, and gives precise steps for getting into "Config Editor" in Advanced Settings, entering a long search string, and issuing a Reset command. (Mail and contacts are just fine.)

Which I tried...

But there is no "Config Editor" button in the dialog I get when clicking Advanced Settings at the bottom of the Settings tab, only a mostly blank screen with no list of settings and a dialog box in which one can enter text (with options for "Boolean", "Number" and "String"). And entering the search string given in the support article produces, with a bit of finagling, a toggle that will change its setting from True to False and back again (and a trash-bin icon that offers to delete it), but neither "True" nor "False" produces any instance of a "Lightning" extension in my list of extensions (which is short and uncomplicated), so (a) I can't delete the extension as instructed, because it's not there, and (b) restarting Thunderbird only continues to give me the unhelpfully blank Calendar tab. (And I do mean "blank" here - there isn't even an empty calendar grid on that tab at this point.)

I *think* the article is probably right that my data is still there (I can see .ics files with current dates in File Explorer), but at this point I can't get at it and can't seem to get the interface unstuck.

Is there a way to pin an email to the top like Outlook? also, I would love to be able to create a unique signature like Outlook. Is that possible too? I tried to just copy and paste and it came out much like this. Crappy.

Thanks!

This has happened twice now when I open Thunderbird. My first email account on the left pane comes up with just the name of the account, no inbox, no folders, no nothing underneath it and it does not expand to show them. I'm not sure why this is happening, but the first time I actually had to completely delete and readd that account to fix the problem. I've searched various places for answers -- change folder views, change layouts, various other suggestions -- but nothing works to resolve the issue. Any help would be greatly appreciated as this is really annoying.

Functioning normally until it wasn't 5 days ago. Can reach outgoing servers but nothing goes beyond. Initially received emails but at this point neither receiving nor sending. No changes on my end. It just started happening.