Thunderbird Community Forum

I followed the recommended procedure to transfer the TB profile from an older W10 computer to a new W11 computer (both using POP accounts ), via a USB Flash Drive. The folders are all listed on the USB profile copy and observed during the scrolling detailed view while being copied to the new computer. Nevertheless, they are NOT listed in Local Folders on the new profile. Instead, ALL the messages (approx 700 of them!) are presented as UNREAD in the inbox folder. How can I restore the original folder sorting?

I have a backup file from another thunderbird installation. The profile in this backup contains a file named abook.mab. I suppose this is the address book. I would like to copy the addresses from this installation to my current thunderbird 147.0.1 (64-bit). Tools > import > address book does not work. Can you please advise me?

When I try to add my Spectrum email back in Thunderbird, it failing to connect when I enter my password. When I go to spectrum.net, I have no trouble logging in with my password. Whaat do I need to do to add my Spectrum email.

Ich benutze Firefox auf zwei Windows 11 Rechnern. Die Version ist auf beiden Rechnern gleich, (149.9 esr 32Bit ) , beide Rechner greifen im Fall des Verfassens einer E-Mails mit Anhängen auf einen gemeinsamen Speicher über LAN zu, seit kurzem gibt es bei einem der beiden Rechner aber beim Anhängen einer Datei an die Mail eine Verzögerung von ca. 5 Sekunden, bevor der Anhang auftaucht, unabhängig von dessen Größe. ( Also auch kleine Pdf´s werden verzögert angezeigt.) Der zweite Rechner hat das Problem nicht, selbst bei grösseren Anhängen. ( Auch sind die Rechner fast bau-und ausstattungsgleich ) Testprogramme auf dem Problem-PC zeigen keine Auffälligkeiten beim Schreiben und Lesen, auch die Internet-Verbindung ist die gleiche... Habe bereits die Einstellungen der Konten und des Programms in beiden Rechnern verglichen, sie sind gleich. Hat jemand eine Idee, woran das liegen kann?

Grüsse, Martin

I cant receive emails only send them. I receive an error message when starting Thunderbird "the current operation on inbox <my email address> did not succeed"

Thunderbird Version 140.7.1esr, Build ID 20260123195141 User Agent Mozilla/5.0 (X11; Linux x86_64; rv:140.0) Gecko/20100101 OS Linux 6.1.0-33-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.133-1 (2025-04-10) OS Theme Xfce / Adwaita Application Binary /usr/lib/thunderbird/thunderbird-bin

Having a problem with an ATT POP account. TB stopped getting mail. After a minute and a half or so (wish it would time-out faster), I get a pop-up box in the top right of the screen that states: "Connection to server inbound.att.net timed out" and then quickly goes away.

Deleted passwords and cannot see where to create them again, as it never prompts me for new ones.

Thanks.

bob.fannon

Feb 14, 2026, 13:01 CST

I have used Thunderbird for a number of years with Plusnet (using POP settings) in the UK. However, Plusnet has transferred their support to a company called Greenby who have made a hash of it and offer very poor support. So, I want to use Outlook as the mail server but I am unable to send any messages via Thunderbird to the Outlook server. I can however download messages with no problems. The error message I get is :- Sending of the message failed. Unable to authenticate to Outgoing server (SMTP) smtp.office365.com. Please check the password and verify the 'Authentication method' in 'Account Settings | Outgoing server (SMTP)'

My default Outgoing Sever settings are :- Server Name : smtp.office365.com Port: 587 User Name: bob.fannon@outlook.com Authentication method: OAuth2 Connection Security: STARTTLS

I have tried deleting the Thunderbird account and re-creating it but still got the same result. I also tried to use my old Icloud account ( having first setup my App Specific password) but got the same result.

I dont understand this new method of sign in message you have sent, im an oldie, not an IT geek, I dont understand & very worried im going to loose access to my e-mail which has inf ormation on that i NEED

I need step by step instructions that an old guy will understand

Dear Thunderbird Developers,

I am writing to express my frustration regarding the recent UI changes. After the latest update, the standard toolbar icons (Get Messages, Write, Address Book, reply, etc.) completely disappeared for me, leaving behind nothing but a search bar. Even using the "Restore Default Set" option fails to bring the essential navigation buttons back. While I can eventually fix these issues as a power user, these constant, breaking UI changes are a major problem for average users. For instance, my 65-year-old mother relies on a stable interface. Every time a rollout breaks the visual layout or hides basic functions, she is unable to use her email until I step in to fix what the update messed up.

Forcing users to manually rebuild their primary navigation toolbar after an update is not a "feature"—it’s a regression that alienates long-time especially elderly users who need reliability over constant redesigns. Please prioritize UI stability and ensure that "Reset to Default" actually restores a functional set of icons.

If you need further information I'll be glad to hear and hope you can give me an easy fix for this problem.

Please answer andere the following address: [edited email from community support forum] Or send a notification with a link to this thread

Best regards,

Dilan Adler

I'm just checking, is it near impossible to add an image to your signature? As old as thunderbird is why has this not been made easier or possible? Just curious, i cany be the only one. i have tried html in the box and attaching the html file.. I then read the image needs to be base64, tried that still nothing. After a few hours I'm sitting here thinking is this 1980? Please help, even if its to say not really possible. Sorry for being a bit snarky, I'm just confused why something so standard for years is so difficult.

Apparently MS has changed something in their OAuth2 and Thunderbird has yet to catch up. I've seen several other questions regarding this, but no workable solutions, just silly replies. Is TB actively working on a solution or am I now forced to install Outlook?