Thunderbird Community Forum

Even though I have Thunderbird configured to leave messages on the server after downloading it still deletes them from the server. Is this a bug in v146? New user.

I use Thunderbird on a Mac, where Gmail is my default email. When I try to send an email, it often takes 10 tries before it goes through, due to timeouts. How can I fix this?

roland.multhaupt

18. Juni 2026, 07:13 GMT-6

Firebird is so slow now, that I can rarely receive the code that you send me. Have to take annother programm for that. Freezes even when trying to mark a mail or erasing it. WIN 11. The programm is working well at my wifes laptop also WIN 11. 2 month ago it worked fast and fine. Working in Troubleshooting mode does not show any spam ordner like before and it does not run better. I also downloaded the last version. No change! I would like to uninstall the programm but did not dare due to perhaps loose all my mails. Could you help me please? Thank you!

To Whom it concerns, It has been about 4-5 days since I can't receive my e-mail. I have e-mail you different times with errors coming up. When I open my mail since yesterday an error now says error with acct. cray9@oh.rr.com. Another error occurred with the POP3mail server. The mailbox closes. Then a box comes up Thunder Bird crash reporter then I can put why and then restart my e-mail. It does try to load my e-mail then stops. And now my password box doesn't come up to put my password in. Last it says connection to mail.twc.com was reset then once again the mailbox closes. Please help, I have been a customer with Thunder Bird for years. Thank you!!

To whom it concerns, It just happened yesterday June 11,2026. I put in my password to my e-mail to open it and it stated that my e-mail account is being processed. Said to wait until processing is complete to get messages. I have never had this issue, I been with Thunder Bird e-mail for years. It isn't even showing my e-mails that I had in my inbox on my e-mail. If you can please help, I need my e-mail up and going. Thank you, Chris Note, it also said that Thunder Bird had crashed in a box, they wanted to know what page I was on. I am not understanding this.

Hello, It's been a few days Thunderbird freezes when I want to save a message on the computer (save as). When I close the saving window which is not responding, it automatically saves the message on my desktop. The file where the last message was successfully saved is still existing so I don't think it is a path problem. I have tried to restart it without the add-on but it doesn't change anything. And it is up-to-date. Anyone knows what the problem could be? Thank you! Estelle

Just shortly Thunderbird always asks for verifying the Google-Calendars when starting Thunderbird.

I already tried to change it to ical via private Calendar-address...

Why is this suddenly happening and how to resolve?

Chris

Good morning, for some time now, appointments on the calendar that were scheduled before I open Thunderbird have been “forgotten” and don't appear. For example: an appointment (or memo) at 8:00 a.m.; I open Thunderbird at 9:00 a.m., and the appointment doesn't show up. Thank you.

Greetings all!

Thunderbird version is 1.52.0

Since this morning (8:00 CET) I have to enter password for my google calendar every time I start Thunderbird. No matter what authentication options I choose, calendar manager keeps asking me to authenticate. "Don't ask again" is turned on. Gmail is set up as OAuth for both incoming and outgoing servers, and it works fine.

Things I've tried since:

- Removed legacy connection in password manager, when I was using IMAP to connect to Gmail - Revoked OAuth permission from google account for Calendar and from Thunderbird password manager - Unsubscribed from calendars and added them again after restarting Thunderbird

I don't know what more to do. Also, I don't know what happened, really, as it worked properly last night.

I don't know what to do when February 29 is in my calendar, 2026 is not a leap year. I've found nothing to help me. I have the latest version if Thunderbird. Thanks

Yes, I'm running unsupported Win 7

And yes, I could not find anything in the "help" system that related.

I maintain a Hotmail account and copy traffic to my local system. Upon reboot Thunderbird shows some files from 2024 and no local folders where I stored all my re-directed traffic.

I've run some system / disk checks and no obvious problems.

Any thoughts besides upgrading to current OS etc? Is there a Thunderbird backup solution to move files away from the active drive to protect them?

I read the instructions on moving my profile to a new computer. The hitch is that on my current, Windows 10 computer, I’m apparently using a 32-bit version of Thunderbird. I only discovered this when I updated it (through Help) and saw that it updated to a December, 2024, 32-bit release. The transfer instructions state that there may be a problem if I try to use a Thunderbird profile from one version to a different version. To prevent that possibility, I either have to update my Windows 10 Thunderbird to the latest, 64-bit release, or specify the 32-bit install on Windows 11. Problem is, I don’t know whether or how I can update Windows 10 computer to latest Thunderbird 64-bit version. Can I? If not, will Windows 11 run a 32-bit release? Suggestions?

I did a fresh install of win 11 25H2 a week ago and with it the latest TBIRD which I think was ~ver 151.

It wouldn't send/receive messages when click "get messages". Went back to 150.0.2 and told it not to update.

get messages worked fine.

BUT Just discovered that things I send aren't being put into SENT folder. Are they being put anywhere? Upgraded to latest 152.0 get messages still works fine but no sent messages.

Guess I'll go back further till you get this fixed. THANKS!!!!! :)

HELP! :)

When I try to add a new contact the box is 3/4 off the screen to the right. there is a opaque square where the box should be, Ive tried the alt/space/m/arrow thing but that's not working, also tried every suggestion from chatgpt, nothing working, reinstalled with No change Win10

On Sunday, May 7, my Thunderbird program suddenly stopped responding (neither the shortcut nor the program itself will run); clicking on the shortcut icon or attempting to open or run the program itself causes the "loading" or spinning wheel icon to pop up, run for about 10 seconds, then stop.

I've used Thunderbird as an email client for my Sonic email account on my pc for over 8 years without any difficulties until now, and now seem to be locked out of my Thunderbird account. I cannot access it to confirm the version, although I believe it is current, since it appears to update automatically.

My Sonic account continues to function normally, but I keep (save) all incoming and outgoing emails in my Thunderbird system and now am unable to access any of those, and unable to access my Thunderbird account at all..

I've consulted with Sonic over this; Sonic maintains that any difficulty must be on my end connecting to Thunderbird, and suggested that I might have changed the account password. However, I have not changed the password, etc.

Please help asap.

Thanks, immensely.

Tim

Hello,

Thunderbird is my default email program and if I receive an email containing an email link of the form Fred.Bloggs@example.com I can click the link and Thunderbird opens a new message to Fred Bloggs. Today I received an email with the following link: email:customerservices@zen.co.uk. When I clicked it a little dialogue popped up asking me which program I wanted to use to open the link. I browsed to Thunderbird and selected it, but when I clicked OK nothing happened. Why isn't Thunderbird automatically handling all email traffic? What settings do I have to make sure that links of this form will be handled properly in future? Why wouldn't the system be told to use Thunderbird?

Alan.

Why do I get unwelcome changes with thunderbird? For some time now emails do automatically open when thy down load. Today when I click on an email to open the Bold print stays. So doesn't show as an already read. Like Thunderbird but may have to look else where if I have these annoying problems just pop up. Help................. John