Thunderbird Community Forum

I need to fix TB to send/receive/save emails after a power failure today, Grid outage at 13:40, Power restored 13:40. Computer restarted, TB opened but will not perform any send/receive/save tasks. TB Message Send gets Outlook notification - Authentication failure. Went to Outlook email, logged back in, test email I had attempted to send by TB is in Outlook, plus new emails in Outlook, but none in TB. Checked for TB updates, current as of Jan 15, 2026. Restarted computer twice. Outlook email works but TB does not perform any tasks. I lost no TB emails in my messages before the power failure, they are all still in my TB messages. I have Firefox Browser and Windows 11. I love TB. It has had cardiac arrest. Help. Ann

I have a Hotmail account and multiple gmail accounts. When I try following your (obscure) instructions for changing passwords, the box of passwords is only for my gmail accounts. None for my hotmail.

As Hotmail is very important to me, I'd like to keep accessing it through TB but you make it tough.

I am now not receiving my Hotmail mail and as I get too much traffic 200+ msgs a day, it will build. Please send simple, direct instructions on how to find and change the hotmail password, thank you.

I spent hours yesterday deleting and moving to local folders over 6,000 emails. Today they are all back! They appear to be all greyed out as if I had read all of them, and the ones I moved to my local folders seem to all be there in the folders I moved them to, in addition to still being in my inbox. Any help or suggestions would be greatly appreciated.

Hello, I only use Thunderbird on my PC with IMAP. For the past three days, while I receive my emails just fine, I can no longer send them. They bounce back with the following error message:

The only thing I've done is also install Thunderbird on my mobile phone. It asked me for a password that I don't know and don't think I've ever had one for Thunderbird.

However, when I go directly to the Free Zimbra website associated with my email, it works and I can send my emails. Thank you for your help.

Christian - Error message attached.

Hello, can someone please fix this e-mail address please & thank you.

Following the instructions provided at this web page: https://developer.mozilla.org/en-US/docs/MDN/Community/Community_Participation_Guidelines I e-mailed a code of conduct violation report to the provided email address, mdn-cpg-report@mozilla.com

Actual results:

I immediately received the following e-mail reply, telling me in effect that my e-mail could not be delivered:

Subject: Delivery Status Notification (Failure) Date: Sun, 15 Feb 2026 21:34:30 -0800 (PST) From: Mail Delivery Subsystem <mailer-daemon@googlemail.com> To: [redacted]

Hello [redacted],

We're writing to let you know that the group you tried to contact (mdn-cpg-report) may not exist, or you may not have permission to post messages to the group. A few more details on why you weren't able to post:

You might have spelled or formatted the group name incorrectly. The owner of the group may have removed this group. You may need to join the group before receiving permission to post. This group may not be open to posting. If you have questions related to this or any other Google Group, visit the Help Center at https://support.google.com/a/mozilla.com/bin/topic.py?topic=25838.

Thanks,

mozilla.com admins

[headers, etc redacted]

Expected results:

I expected instead to receive a reply telling me that my e-mail had been successfully received.

Hello, i want to integrate my dates from a Google Calendar on my smart phone (Samsung) in the calendar from Thunderbird (Version 147.0.2 64 Bit). Is it possible an how to do it? Greetings from Horst

I'm new to Thunderbird and am having a problem when printing emails. The page to be printed, when shown on the initial screen as well as when actually printed, starts with a long list of technical computer-related data which, in the case of new Inbox emails, takes up about 1 1/3 at the outset of the printed pages, even if the email message itself is very brief. Even when I click off "print using system dialog" at the bottom of the Print menu, that technical data (though no longer shown on the initial screen) is still included when printed.

I can't find a solution in the online help files.

Thanks for your help in trying to resolve this,

John

Changed my BT mail password. I can receive mail but when trying to send I am asked to enter password which is not recognised. The SMTP server does not reccognise this. I have checked other questions and all seems well in my settings, i.e. changed stored passwords, but I must have missed something.Any advice most welcome Don

Lange Zeit habe ich problemlos mit Thunderbird gearbeitet. Plötzlich kommt eine Fehlermeldung und nichts geht mehr: sehr ärgerlich. Ermöglichen Sie bitte umgehend den erneuten Zugang! Mit freundlichen Grüßen Wolfgang Beu

P.S.: Eine Vielzahl von gespeicherten E-Mails habe ich inzwischen gelöscht; daran kann es also nicht liegen!

Hi there - I'm hoping someone can help. Following the July 2025 update to Thunderbird, I was suddenly unable to download my email messages into Thunderbird from my Rogers Shaw email account. When I try to do so, I get the error message: "Login to server pop.shaw.ca with username failed. I'm given three options - retry, enter new password (which hasn't changed), or cancel.

Does anyone have any idea what might have changed post update?

When I opened Thunderbird on my PC this morning, the text of messages received no longer displays. What is displayed is a link to the website to view the message. How can I recover the display please. Thank you. Elise

Having followed the instructions on the desktop, I've copied the QR code to get Thunderbird on my Mobile but the only folder appearing in each of the three email accounts is the Outbox. How do I sync the other folders please?

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Artifacts have appeared within the program. Everything works fine in other programs.

This appeared after the last update. Judging by the picture, it's possible some of your icons are broken.

Please fix this. I can't use the program now.

I now have 2 accounts in Thunderbird: Local (which has years of folders, but stopped receiving email from my Web mail provider) and my webmail Provider that does not download it from the provider. He claimed it is more modern and safer to synchronize across all devices and keep stuff on the web Mail application. I prefer to keep all my folders and emails on my local computer. Should I use POP? iMAP? to do that? Thanks for your assistance?'