Thunderbird: форум сообщества

I have been using Thunderbird successfully on Windows for years now, as my email client for a PlusNet email account in the UK. In May 2026 Thunderbird suddenly disappeared, as if it had been uninstalled, but I have no idea why. I managed to reinstall it and rediscovered the server details needed to reconnect to my account and fortunately had a slightly old back up (from Nov 2025) of previously saved emails. This has worked OK now for about a month.

Today the same thing has happened again - The Thunderbird icon on my desktop does not connect to anything and has just turned into a white "blank page" icon.

I may be able to get the account back by doing the same tedious process again, but I am concerned that this may keep happening and I don't know why.

This is a work laptop running Windows 11 so its possible I suppose that some sort of security software may be doing this without notifying me?? I am using Thunderbird to access a personal (ie not work) email account so maybe my work systems don't like that? As mentioned, it has worked fine for years so I dont know where the problem lies but it is worrying and annoying.

PlusNet last year transferred all email accounts to another UK provider (Greenby) but that has worked OK and I cannot see how that would affect email client software.

BJ

I had to start anew with Firefox on my desktop. New password and settings. I am recognized, but i cannot find my e-mail to open

you say you will send an e-mail when someone has an answer for me .. i may get it on my mobile, but my desktop does not even have an e-mail account showing

Every time I try to open Thunderbird mail, I get a screen to install it again!!. Why is this.?? Is there a way to keep it installed.? Or must I jump through hoops each time I need to use email.?

Ever since last maj, windows are no longer resizable. Same Thunderbird version works OK on my laptop running Debian 12, but I cant easily upgrade version Debian 11 to debian 12 on this older desktop, so I wonder whether I could possibly de-install v140.13.0esr and re-install an older version, if then, which one would be suitable and available. If not, is there another trick to resize windows on v140.13.0esr ? Thanks in advance for your help.

I bought a new pc with windows 11 and everything is fine except that I installed thunderbird via microsoft store and when I gave it my email address, I could see my emails but it hasn't created a profile. Therefore when a try to view the profile it says user.../appdata/roaming/thunderbird/profiles... doesn't exist. I am logged on as an administrator. Should I uninstall then install from the mozilla website directly?

Recently I moved from a Thinkpad X1Yoga running Mint and Windows 10 to a Thinkpad P14s running Kubuntu and Windows 11 Pro 25H2. On the Win11 side (which behaves differently from Win10), there are installation issues affecting both Firefox and Thunderbird.

Win 11 Settings lists: under Apps > Installed apps

• . . . (other apps)
• Mozilla Firefox (x64 en-US) 154.0
• Mozilla Maintenance Service 153.0
• Mozilla Thunderbird (x64 en-US) 153.0.2
• . . . (other apps)

under Apps > Default apps

• . . . (other apps)
• Firefox
• Firefox
• . . . (other apps)

That is, Default apps lists Firefox twice (though not as "Mozilla Firefox"), but Thunderbird not at all. This causes two problems:

1. It's not clear which Firefox to choose for browser protocols.
2. There is no Thunderbird to choose for mail-related protocols,

Can someone tell me why the Installed apps and Default apps list differ, and how to set the appropriate defaults for Firefox and Thunderbird?

Thanks, John

Dell Desktop - Windows 10 to Lenovo Laptop Windows 11 I followed the Alternative Manual Transfer between Windows 10/11 Roaming Profile and Local Profile Now on Lenova - Mozilla will not open - Profile Missing - Your Thunderbird profile cannot be loaded. It may be missing or inaccessible. I do not know how to uninstall it or how to start over.

I am encountering a message of "The installation seems to be incomplete. Please check your hardware and disk setup and/or re-install." when trying to run Thunderbird.

This first occurred on a system that had been working for a while. An update may have been installed.

Here's what I've tried. -

Uninstall Thunderbird (along with Firefox and Mozilla Maintenance.) Checked for Program Files/Mozilla folder (all were removed). Run SFC / Scannow Run CHKDSK Installed pending Windows update. Restarted the System Renamed (essentially removed) Profiles folder Turned antivirus software off Downloaded and installed the latest version of Firefox, then Thunderbird. Launched Thunderbird. Still received the same error..

Any ideas on how to resolve the issue?

My Mac last night lost thunderbird (and numerous others things) and it's setting itself up again. I get an error that smpt already exists and I can't go any further! What's going on? Using Comcast Mail.

I am trying to evaluate your product, but i cannot load the program. it appears that this product does not have technical support. If the only technical support is from a forum or community, i will look at other products. i do not know the version since i cannot load it

I installed thunderbird for Windows on PC all was good till it went looking for a outgoing server a red box popped up and said outgoing server is already installed . That ended the install.

On https://www.thunderbird.net/en-US/thunderbird/all/ if one were to select "Need a specific installer?" for any locale and any release channel and select "Linux" with "32-bit (binary)", then selecting "Download" means you get taken to a variety of "404 page not found" pages.

I do not need a Linux 32-bit release and I am not sure one still exists, but just wanted to report this error on the webpage.

Whenever I use Thunderbird (TB) I get the following error message:Thunderbird is damaged and can't be reopened." This file was downloaded on an unknown date. What is the problem and how can I get rid of the error message.