Thunderbird Community Forum

My Thunderbird calendar is frozen. When I click on November arrow the calendar does not move to December. SAme for year. I have the calendar set as weekly however the screen does not show the days. The odd time that I get the current week to show I can not enter a task/reminder. Please help

My two Optimum email accounts (POP3) stopped sending messages. See attached error message. They are still working on a different computer with the exact same settings and Thunderbird version (Windows 10 on both too). I also have Outlook and Gmail accounts all still sending fine. Sending from troubleshooting mode and clearing the startup cache didn't help. Any clues what I can try?

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.

Mt T/B was working ok, then for no apparent reason I can not get my emails nor sent them. It tells me to go to configuration settings. When I get to settings and look for passwords. and view passwords, my main email address is not there; others are, along with their passwords

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 have 5 accounts. Since the update when I start Thunderbird, some accounts appear in name only with no folders. Then, if I exit then enter again the tabs may appear and the Thunderbird sets about resyncing them all. Help please.

I keep getting a pop-up message from https://s1021.use1.mysecurecloudhost.com requesting my username and password for one of my accounts. I enter both, I still have access to my accounts, and still the pop-up recurs. How do I resolve this??

Latest update (I reinstalled rather than update) left several aspects of TB operating poorly, esp calendar and address autofill. Calendar either doesn't display or displays empty; I tried posted fix of changing config and rebooting, didn't help. Address autofill simply stopped working, though all my address book directories are intact. Thanks in advance for any advice.

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?

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.)

Environment: Desktop PC, Windows 11 Pro ver. 26H2 and updates are current. Multiple e-mail accounts. Process: Select e-mail to be deleted Click "Delete" button The e-mail selected is deleted AND the one directly below is also deleted. This occurs in all accounts. The issue started to occur about 3 weeks ago and was present before the 26H2 Windows update.

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.