Thunderbird Community Forum

I’m using the Windows 11 version of the Thunderbird app, but when I try to add my Outlook account and enter my password, it shows “Authentication failed. Please check your username and password,” and I can’t complete the Outlook setup. I’ve tried changing my Microsoft account password and entering an app password, but neither worked.

On 9/10/24, I tried to download my email and got the 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." To my knowledge, nothing had changed on my Win 10 computer, so why this is suddenly showing up is unclear. I have 555 GB of free space on my C: drive, so space isn't an issue. I don't know why the permissions would have changed.

I checked the TB help and found that there was an update, so I installed that. I checked for updates a second time and found another one which I applied too. TB is now at "128.2.0esr (32-bit)" according to Help > About.

I tried restarting TB in troubleshooting mode, but that didn't help. Can someone suggest a way out of this?

Thanks in advance.

Hi,

I need help on topic "Outlook, PST, EML and local folders".

I have .. - Win 10, 64 bit - Outlook 2010 - current thunderbird, first time installed 10 days ago (newbie!) - a huge, locally stored PST file with a lot of folders, like "in_2014 / In_2015 / .. / Out_2014 / Out_2015"

I want .. - to have access to the mails in the PST with Thunderbird.

I did .. - read some information and found that there is no direct access - install ImportExportTools NG - tried to import "Via Outlook", but failed: "No profile found". I think Outlook 2010 is too old - install "Outlook Viewer" from CoolUtils. Opened the PST, exported a lot of EML-files, one for every single mail. - defined a "Local folder", called "in_2014" - copied the EMLs to this folder. They appear in the folder-tree of Thunderbird, but not as single "mails". I have to open (doubleclick) every EML to see the mail. - tried to "Import" the data (one by one / many together / from folder) to the local folder, but got a long error message with a lot a strange error-codes - tried to export data from PST to one single EML with many mails in it. Failed, the software does not offer this feature. - tried to "Import" the EML to a folder of a mail account. This was successful, but only the first step. - tried to move / copy the currently imported mails from mail-account to my local folder: failed again without reaction and without message.

What can I do now? How to get mails from a PST to a locally stored, Thunderbird readable structure?

Thanks in advance for help.

Two questions:

1) My TBird v115.18 (32-bit, Windows 7) no longer allows me to get emails from the server. This just started today (7/17/25). I get a message that says there are no emails. The emails download properly on my Windows 10 PC with the latest 64-bit program. Is there anything I can do or change that will restore that function on my Win7 PC?

2) Is there a 64-bit version that will run on a Windows 7 PC and perhaps solve the problem in #1 above? If so, how can I get the proper 64-bit version? The latest TBird 64-bit will not run on Windows 7.

Thanks for any and all help.

TC

After Thunderbird just updated to Version 128.5.0esr today, now all my accounts are saying that the connection is refused. This is coming from three different email services that I have accounts on. I'm assuming it's not an issue with those servers as I can access them just fine with a different email client, and I didn't change any settings. Yesterday it worked, today it doesn't. Only thing that seems to have changed is Thunderbird got updated.

I just recently switched to Thunderbird and Libre Office to get rid of MS365. I am happy so far, if there wasn't one particular issue which I do not find a solution for:

I know how to sort messages with the newest on top, I know how to toggle the threaded view on and off. But I would like to use the threaded view and find it impossible to adjust a descending order within a thread. So I end up with the newest thread on top, but the thread headline shows the oldest message and if I unfold the thread it's in ascending order.

This is a major issue for me. To avoid overlooking incoming mails, I need to switch of the threaded view. Websearch didn't provide me a solution.

Hello Thunderbird community,

I’ve been exploring Thunderbird’s integration options and noticed that while email sync with Outlook accounts works fine, calendar and contact synchronization with Outlook/Exchange Online is currently unavailable.

This is a significant limitation for users who rely on Outlook’s ecosystem for scheduling and address book management. I’d like to ask:

Is there an official roadmap for when Outlook calendar sync will be supported in Thunderbird?

Will Outlook contacts sync be added at the same time, or as a separate feature?

I believe many users would benefit from clarity on this, since full Outlook integration is critical for those working in Microsoft-centric environments.

Thanks in advance to the Thunderbird team and volunteers for any updates or guidance.

For months I haven't been able to send emails from my MSN account. I receive mail OK. Two other email clients work fine.

SMTP settings are default from TB download. I have a laptop and a PC, both running Win 10 and both had the same problem. I uninstalled and reinstalled TB on the PC and that corrected the problem, however when I did the same on the laptop I still get the error message: Unable to authenticate to Outgoing server (SMTP) . Please check the password and verify the 'Authentication method' in 'Account Settings | Outgoing server (SMTP)'.

Settings are: server name: smtp.office365.com

                     port: 587
            connection Security:  STARTTLS
                     authentication:  OAuth2
                           user name:  ****@msn.com

I've tried the new install 3 times, no joy. I'm trying to understand why one machine works and the other, with the same settings does not. What am I overlooking here?? Thanks for any help, T

Hi there - been using Thunderbird for donkeys (since it was Eudora!). A few weeks back I started to get messages from Microsoft that I needed to change security settings as they were no longer supported on 3rd party email handlers like Thunderbird. So I re-created the three accounts I had there and it seemed to be OK, though SMTP did not have the OAUTH2 option available ... and when I tried to use the new SMTPs they wouldn't work. So I reverted to the old settings there and it worked again.

But this morning, with the big update to Thunderbird Nebula, I can no longer send emails from the MS accounts. My Gmail one is still OK ... but whatever I try, I cannot get the MS ones to send emails - I get a failure connecting.

Login to server smtp-mail.outlook.com with username xxxxx@hotmail.com failed.

I checked on MS and the details shown there:

SMTP server name smtp-mail.outlook.com SMTP port 587 SMTP encryption STARTTLS Authentication Method OAuth2/Modern Auth

Are what I have (I did have a different SMTP Server name came up - smtp.office365.com - but that doesn't work either)

So ... where is the issue? Is this a bug in the new Thunderbird setup? Something else? I don't know where to go ...

David

Hello, I have spent considerable time scouring help forums, but still unable to resolve. I am running Windows 10 that is fully patched, and most recent version of Thunderbird.

In my recent attempt to setup gmail; - I used Chrome as default browser with default security settings - I turned off 2fa in Google - I turned off VPN - I left gmail password blank during account setup in TB - authentication initially fails during setup, so I then select manual config and normal password. This allows TB to supposedly complete gmail account setup successfully. - browser opens up requesting TB access to gmail, (Allowed Apps in Google include TB) - I change gmail server settings to Oauth2 and restart TB - The saved passwords in TB only list an Oauth2 pwd for calendar, but no entry for email.

How do I get TB to request and store credential for imap.gmail.com?

Thank you for your help, Jeff

why is everything going to trash in thunderer but not in Comcast.net email what do i do o i eed to reinstall it and uninstall it

can not  do restore point

I use Thunderbird on Windows 10; I have a verizon.net email account which I access through Thunderbird. Verizon.net email is transferred to the server from AOL Mail, and I have been able to get and send my emails on Thunderbird at verizon.net for years. This week, after Thunderbird's latest update, I have not received any incoming mail on Thunderbird, but I can see my emails on AOL Mail. The technical expert I consulted deduced that the problem is with Thunderbird such that AOL is not connecting to the incoming mail server, even after the password was changed. I can send messages successfully from Thunderbird; the outgoing mail works.

I have 7 email accounts. Compacting only fails with one account. I can compress the sub folders of this email account. But compacting fails with top email account fails with the following message:

The folder email@gmx,de could not be compacted because writing to the folder failed. Verify that you have enough disk space, and that you have write privileges to the file system, then try again.

When I upgraded my ubuntu system from 22.04 to 24.04, I was compelled to accept the conversion of thunderbird to snaps. Now none of the applications -- like http handler -- will run because snap maps them all to something under /run/usr/... AND THEY WON'T RUN FROM THERE I cannot even use Help to make a donation! I need to be able to get to vivaldi, firefox, libreoffice and others. Every time I enter one in the application box, the snapper remaps to /run/user/... I try to find that location and it's not there -- of course it won't run! -- and the application won't work. screenshots attached

Tell me how to roll back from v128.3.1esr to a version without snaps -- without losing 10 years worth of email!

The automatic setup fails to find the settings when creating a new mail account.

Manually setting up the account settings returns an error that Thunderbird can't find the server. The system has no issues finding the server. Calendar in Thunderbird has no issues finding the server but when trying to setup an email account I get the error that it can't find the server.

Pressing continue creates the settings but fails to create a username and password for the account.

There is now way to create a username and password for the account so it fails to connect to the server.

There is no way to create an account by providing all the information. We don't need a nanny, we need something that works.

Why did we mess with something that worked? How do I add an account manually?

Hi, I recently had to reset my pc and reinstall all applications including Thunderbird. The following were the steps I took after Thunderbird was reinstalled: 1. I then copied my profile data from a data backup to my laptop into C:>Users>username>AppData>Roaming>Thunderbird>Profiles using internet explorer. 2. I then changed my Thunderbird Account settings to use my original profile in Server settings under Local Directory. 3. At the same time I also changed my mail server from imap.bigpond.com to imap.telstra.com however it still recorded the server type as POP Mail Server.

When Thunderbird application restarted after the above changes, I noticed in the Mail Folder display that my Inbox folders had duplicated along with Deleted, Trash, Draft, Archive & Sent folders e.g. it showed Inbox and relevant sub folders and INBOX-1 with the same relevant sub-folders. Some of the sub folders in Inbox were missing stored emails and these were found under the INBOX-1 subfolder. Also under the Local Folders section it also displayed current emails under the Inbox folder which are recorded in the Mail Inbox folder. So not knowing why this occurred or to resolve, I decided to uninstall Thunderbird and then download it again. By doing this, it has fixed the display issues mentioned above in the Thunderbird application but I still have duplicated Inbox, Sent, Deleted & Archives on my laptop under my Thunderbird profile folders. So my query is....do I attempt to move the data from the duplicated folders to the main folders or just leave it as is seeing it appears to be working?

I use Thunderbird 128.2.0esr (64-bit) to read mail from the Outlook server; these are the folder mappings:

imap://<email>@outlook.office365.com/INBOX imap://<email>@outlook.office365.com/Sent imap://<email>@outlook.office365.com/Drafts imap://<email>@outlook.office365.com/Trash

I used to also be able to read the Junk Email folder from the Ourlook server the same way, but the folder disappeared from my Thunderbird a couple of months ago. I tried re-adding it as a sub-folder, which is how I created it in the first place, but it won't appear on the list.

I'm not sure what else to do here. I don't know where the Thunderbird directories are stored locally any more, I'm using Ubintu 24.04.