Thunderbird Community Forum

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.

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!

Hi,

we developed an add-in for MS Outlook. The add-in, connects to a mail message, and reads information from the mail - to transfer information to a special journal system.

Is it possible via API to Thunderbird, to create Add-Ins as seen from MS Outlook?

Best regards, Michael Vad

For the last two weeks I have noticed a marked decrease in the number of emails I am receiving. This is on my X@scratchmitt.com account email provider Gandi. I have attempted to contact Gandi but no response as yet. Is it possible the fault lies within my Thunderbird settings or installation?

(PII redacted by moderator)

Until recently the folder pane could be sized or hidden via the double-headed arrowed cursor. Shortly after the 151.0.1 update this stopped working. All suggested solutions have not worked. A full uninstall (Revo Uninstall) and completely new profile has not fixed the problem. Folder pane only responds to the menu setting and is only Open/close but no sizing.

receives no email. sends no email. my server received many emails since then. everything else seems to work. it is not my server as I have Outlook, which received the emails. Only thunderbird is locked-up.

i have lot of junk mails as scam in my inbox folder daily ,, why cant they move into junk folder as i already setup ,, am i miss something at setup? Michael Thompsett

This is a weird one, but as of a few days ago my email account has glitched and is sending an old auto-reply to every incoming email. I've ensured there's no auto-reply filter on my inbox at all, and have deleted all the templates, but for some reason it's still sending it to everyone.

Worse still it's now stuck in an auto-reply loop with the mailer daemon due to receiving a no-reply message, so my inbox is just filling up with endless 'Message Delivery Failure's!

I've also logged into the account via our hosting agent (123reg) and there are no auto-replies enabled there either.

Any help or advice very much appreciated!

Thanks, Kez

I create a new address book in Thunderbird. I add several email addresses to that book. I close Thunderbird at the end of the day. When I open Thunderbird the next day, the new address book has disappeared. Any idea what I am doing wrong, missing?

I have created folders that I want specific emails to be put in when they arrive. But I don't know where to create these rules. Creating the folders is easy but how do I create a rule that tells Thunderbird which folder to put emails from specific people/businesses etc

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.

I just upgraded from thunderbird 140 to 152 on Windows 11. I have master password setup.

Every times I start thunderbird, calendar keeps asking for authentication ( oauth ) , I did login successfully and was able to view and modify my events.

After a couple of startup I decided to click on the close button of the oauth authentication windows for calendar. I still able to see and modify my calendar successfully. Is it a bug or I miss something in the calendar settings  ?

Thanks

I changed my password in my email provider. TB kept saying that it was the wrong password. After a few unsuccessful tries I rebooted tb. It worked. Then, whenever I opened tb it asked for password. I then tried checking 'password manager' and it remembered the password. Fine. Could have been easier. 1. Notice that tb requires reboot to accept password change. 2. Explanation that password manager is "remember password so you don't need to enter every time".

A little more nitpicking: For as long as I have used tb I cannot print a selection of an email. It wants to print the whole thing, along with headers. I have to select, copy, paste to notepad, then print. Could be easier.

Within the last 6 weeks I migrated to Win11. I migrated my apps that would work and Thunderbird also. Got a recent update of TB. Finally MOSTLY disabled the bloody awful thread thing in TB (seems to be folder specific??!).

But ever since running on Win 11, I cannot stop TB from marking my messages as read even if I have never opened them. Even If I never use another device to connect with email. I try things and sometimes it works for like a day and then poof! : any email that comes in is read as per TB.

It is killing me. I run my biz on email and if it is unread I give it low priority. But turns out it is marked read without any action from me. I get a LOT of emails.

Really! I do no want to migrate to another email program.

I am fluent with regedit and can hack a .ini file. Point me in the right direction please.

help!

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!!

I have a Yahoo.ca email address and have been using Thunderbird to retrieve my email for years. For some reason, a window now pops up to Rogers.com and they want me to log in there. This is not a Rogers email address and it is separate from Rogers. I had this issue before and this forum managed to get me back. My settings are correct. I have deleted the profile 5 times and added it back after a computer restart and still nothing.

I have used Thunderbird for years but mid windows 10 I started having this problem I have all my user name & Password in a note pad for all places I go to.I'm on Winddows11 home.Also I can't sign in so I can;t Tell you what Version I have.

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.