Thunderbird Community Forum

I have had an ongoing problem with Thunderbird being unable to log into the various mail servers that I use. I've tried repeatedly to solve this problem and have been able to cure it in the past by clearing the cache, but it recurs over and over again. I cannot keep wasting my time like this. I'm an independent contractor and I need to be able to use my e-mail client consistently. I've got work to do! This morning, it's suddenly decided that it cannot log into any of the three services that I use.

Is there a lasting solution to this problem? If not, please tell me and I'll move on peacefully, but please don't keep me chasing my tail for something that cannot be fixed.

After changing my settings for incoming and outgoing mail servers, Thunderbird still times out. Also, I changed the yahoo server settings to imap but the server type shows as POP. Is that causing the time out problem. Here are my current settings: Yahoo Server Type: POP Mail Server Server Name: imap.mail.yahoo.com Port 993 Username: dragracers@cox.net Connection security: SSL/TLS Authentication method: OAuth2 DOES NOT ask for account or anything else.

Description: Yahoo Outgoing server: smpt.mail.yahoo.com Port: 465 Security and Authentification: Connection security SSL/TLS Authentication method: OAuth2 User name: dragracers@cox.net Does not connect with a time out approx. 30 seconds later.

Mozilla automatically put in the necessary info for an xfinity email account and said it was accepted, but I don't see the second account in my email program. Can you help?

Yesterday I changed my AOL password online. Now Thunderbird email no longer works. I get a popup labelled "enter credentials for user on pop.aol.com". Within the popup window it says "Edge: Too Many Requests"

Settings have not changed and worked prior to password change. I believe if the popup window was working correctly I could enter my new password and all would be fine.

pop.aol.com 995 SSL/TLS OAuth2

smtp.aol.com 465 SSL/TLS OAuth2

Thanks,

Ed

I am a very long term Thunderbird user with gigabytes of historical emails w/attachments currently running esr 115 on my primary Windows 11 (upgraded from Windows 7 to Windows 10 to Windows 11) workstation. I need to migrate to a newer host which also runs Windows 11, so I installed release 144 over the weekend to get prepared for the migration. I know that the basic rule is that the From and To Thunderbird apps must be running the same version, but out of an abundance of caution, I would like to do that at the version of the production system which is on ESR at version 128.5.2. The download page is only offering a 140.something on the esr channel. Is there anyway to get 128.5.2 to accomplish the migration?

Sorry! 0 results found for ‘Thunderbird locks up when I'm typing an email and says Thunderbird is not responding. Has been going on for a couple of weeks. I'm on Windows 11.’ for ‘Thunderbird’

I recently transferred my Thunderbird email to a new Windows 11 laptop. Everything is ok, except the font size in received emails can best be described as very tiny. I've tried everything to increase the font size, but nothing helps. My screen has a resolution of 2880x 1880 Any help would be much appreciated. Thanks.

I changed my yahoo password and can longer access this account in Thunderbird.

Now when I sign in to Thunderbird I get 'Edge To Many requests'

Unfortunately I deleted the yahoo user name and password in Thunderbird Password/ Saved Logins thinking Yahoo might automatically ask for my new password when re-starting Thunderbird

Can somebody help please.

Many thanks

I have been using Thunderbird for many years. I have 4 accounts that have all been set up and working fine. This morning the 2 yahoo.com accounts stopped working. I logged in to the impacted accounts using a web browser and password just fine. I then updated Thunderbird to 116.0 to see if that would fix the problem, but it did not. The outlook and gmail accounts are working fine, for now.

When Thunderbird attempts to download mail for the yahoo accounts, I get a large pop-up window with "Edge: Too Many Requests". The pop-up window is blank except for that error message. I get the small pop-up with the Authentication Failure message. Sometimes I get Retry, Enter Password or Cancel. But I never see a window that will allow me to enter my password.

I can send/receive mail from the accounts while logged in via a browser but authentication fails within Thunderbird.

How can I set the calendar to completely show on the screen - currently in Full Screen mode half of Sunday is off the screen, including the settings icon next to Day/Week/Multiweek/Month. My monitor is a 19" diagonal 4:3 - not a widescreen 16:9. For what it's worth the mail screen displays fine

Thanks, Marc

I have an email that is stuck in a local folder. The email appears to be empty. I can see the subject, correspondent, date, and status; but when I click on it, all I see is a blank page. I can neither delete nor move it to another folder or my desktop. How can I delete this message?

Thanks to anyone who can offer a solution.

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.

I am trying to upgrade from 128 esr version to the new 139 version. I tried several ways to transfer data from the old version to the new version - I tried to export and import a the Thunderbird zip file. I also tried to open profile manager and creating a new profile that refers to a copy from my old version. Nothing has worked. In the old Thunderbird 128 version, if I select Help and Troubleshooting Information and then Open Folder next to the Profile Folder I get an error in Thunderbird that it can’t find my profile. I get the same error message when I go to Tools, export and select "open profile folder." This in spite of the fact that the old version continues to correctly display my contacts, tasks and events

After several hours of this, I finally decided to download version 139 using the standard Mozilla set up even though my Thunderbird 128 version is located someplace else. So, at this time I have two working versions of thunderbird on my computer – the old 128 version with all my data and the new 139 version with no data.

I think I need help figuring out which Profile has my contact, calendar and task data. Then I need help getting it to the new version.

Thanks

Luke

Hi Thunderbird,

Windows would not let me keep any apps when I upgraded to Windows 11 so I am having to set up Thunderbird again. But I also had to sign into my Yahoo account again - and had to change the password. Now Thunderbird can find my address (<redacted>@yahoo.com) but it cannot verify the password.

I had an email I had to send today so had to download Outlook - against all my principles! Please, please, find a way I can get back to Thunderbird and expunge Outlook! I donate every month and have done for years. . .

Best wishes, Kitty

Thunderbird 138/139, Windows 11 Pro 23H2. While composing a message, after a few lines the app freezes. Both the compose window and the main TB window freeze. Only opening the Windows Task manager allows me to close them. This did not happen with earlier versions.

If I save the message every few seconds while composing I can get most of the message back and continue after restarting TB. This behavior is the same in both the normal and troubleshooting TB modes. I can't even find a crash log to send to Mozilla.

Where shall I look next?

Thank you!

This has happened the last two times I've tried to write a reply. I will be writing along and all of a sudden the screen dims and I get the blue circle thingy. Thunderbird locks up and doesn't come back but the red exit button is available. Of course, I lose all the reply I've written. I've never run into this error before and I've been using Thunderbird for years. I'm running v. 139.0.2 (64-bit) on a win-11 laptop, Firefox in the background but no other programs running. I clear my cache at the beginning of every month, so I did that this morning before starting any programs.

Thunderbird is freezing when I try to type a message into the new message window. It takes maybe 100 characters or so, then just freezes and requires ctrl-alt-del and end task to get out of it. This began with auto-installation of 140.0.1 as described below, and is 100% reproducible.

Environment: Windows 11 home 64 bit (specifically 2025-07 Cumulative Update for Windows 11 Version 24H2 for x64-based Systems )

Running Thunderbird 140.0.1: Thunderbird 140.1.1esr was auto installed on July 10, 2025. Version history says that the install failed, but version showed as 140.0.1esr. This is when the problem began. On July 18th, I downloaded the release version of Thunderbird and installed that (140.0.1 - no esr). This did not resolve the problem. Troubleshooting info now shows 140.0.1 - no esr as the current version, but the update history does not show that upgrade/downgrade in the list, so I'm not sure it happened.

Things I have tried: Windows safe mode Thunderbird safe mode Clear caches Removed several mail accounts from Thunderbird

Below is system info from Thunderbird troubleshooting page.

 Application Basics

   Name: Thunderbird
   Version: 140.0.1
   Build ID: 20250709044702
   Distribution ID: