Thunderbird Community Forum

I have a number of pop3 accounts with the same mail host, but suddenly one of them gives me the message "Unable to write the email to the mailbox. Make sure the file system allows you write privileges, and you have enough disk space to copy the mailbox."

I use Thunderbird on two Windows machines, and the problem is on both, so it is something in the interaction with the server, however, there is no problem accessing the mail via webmail directly on the server.

I have tried to change password on the account, but the problem did not go away. In fact, I got the box to tell me that the old password did no longer work, so I know that the problem pops up after log in to the account. Before the error message appears, the message "downloading 208 messages" (or something similar) briefly appears.

Is there a way to find out exactly what fails?

Login to the server pop.gmx.net with username "..." failed.

I have several accounts with GMX. Two work, and the other two display the above error message. Everything works when I log in via a browser, but not in Thunderbird. The account settings are identical for all four accounts except for the password and username.

What can I do?

Thank you in advance.

How do I view the messages referenced by the dialogue asking me "Do you want to send your unsent messages now?" This dialogue suddenly started to appear when I startup Thunderbird. The dialogue has two buttons: "Send Now" and "Later." Thanks

Hello! It seems Thunderbird emails are suddenly being 'threaded'. It is causing great confusion in my office.

I need to see each email from a person separately in order to find them easily and also to reply to each one at the time it is received.

Can someone please explain in very simple non-techy jargon:- a) How I 'unthread' messages already threaded AND b) How I stop any new ones being threaded in the first place.

Thank you Tylex

A few months ago I installed Thunderbird onto a new PC having previously used it on a previous PC (so I'm not a newbie).. However I'm seeing a persistent issue that I never saw before...

I've a regular contact whose name I won't specify but let's call him Roger Smith. What happens is that whenever I post something on a forum (such as this one) and somebody replies, the replies look as if they came from Roger Smith - even though he's got no connection with the actual forum.

It doesn't happen with every forum - for example it doesn't happen with this one - but it does affect most of them. Has anyone else ever reported this and is there anything I can do to correct it?

Now in v 150, I can no longer modify the tools in the reading pane. Used to be able to but it seems to have disappeared. Of course layout is modifiable but spacing out the tools (so that I don't hit the wrong button in error) or turning some off is no longer an option. The More|Customize does not do much for what I want. Thoughts?

I had to restart my Mac. When TB restarted during relaunch of the Mac, it was like TB starting fresh. It didn't display my email accounts, or my folders with saved emails, etc.

I quit TB and looked for it in my Applications folder - and I found two versions of TB. Inside the Thunderbird folder was version 140.9.0esr. Outside the Thunderbird folder was version 150.0. See attached screen grab.

I thought I should try launching the newer version (which was outside the folder). So I moved the 140.9.0 version to the trash, then launched the newer version – and it had the same problem. It looked like I was starting TB from scratch.

Next I quit TB (the newer version) and moved the older version out of the trash and back into the TB folder and double-clicked on it. A dialog box popped up saying that the file is damaged and can't be launched.

So I tried launching the newer version again, and it still looks like starting from scratch.

I really hope somebody can help me solve this. I can't access any of my email accounts or any of my stored emails. I use email for work (as most of us do), so this is crippling me.

Thanks in advance for any help.

One of my local folders of email disappeared: it is no longer displayed under Local Folders. A few days ago while using my mouse to move a message into one of the local folders, something happened, a peculiar message briefly displayed. At the time I did <Ctrl>-Z to undo whatever happened, but I didn't see any changes. That must be when the folder disappeared, but I'm not sure.

My other folders are still in place. I can't find the missing folder inside any of the other folders (junk, deleted, archive, etc.). Yet when I search for email in one of the missing folders, the messages are found. When I go into Troubleshooting Information, there is no Profile Directory listed, and when I click on the Open Directory button, nothing happens. (I've gone through the process of transferring Thunderbird accounts to new computers in the past.) I'm using Pop!_OS 22.04 Linux and Thunderbird 140.10.0esr. I backup my laptop using Back In Time. Any idea how can I fix this?

What is an easy to use anti-spam program for Thunderbird that will allow me to easily mark new messages "block sender" or "block domain?" My e-mail host InMotion and their Spam Assassin does not support quick and easy marking of new messages.

I am unable to add my Outlook email account to Thunderbird Desktop. I keep getting an authentication error when entering the Outlook password which I know is correct. Adding my Gmail account was no problem.

My email messages format has changed. Used to be a very readable format now it has changed to a bunch of links with small wording. Example - an email from Swansons: [Swansons](https://www.swansonvitamins.com/)

[Health concern](https://www.swansonvitamins.com/health-concerns)

[Supplements](https://www.swansonvitamins.com/supplements)

[Women's health](https://www.swansonvitamins.com/womens-health)

[Men's health](https://www.swansonvitamins.com/mens-health)

[Email us](mailto:customercare@swansonsupport.com)

[Call us](tel:18008244491)

[Commit to your health transformation](https://www.swansonvitamins.com/help/company-information/top-10-faqs/10-faqs.html)

[Learn more](https://www.swansonvitamins.com/help/company-information/top-10-faqs/10-faqs.html)

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This is an inch and foot indicator: " and ' This is quotation marks and an apostrophe: “ ” and ’

I want my emails to be grammatically correct and currently everything uses the inch and foot indicators instead of quotation marks and apostrophes.

Thanks, Janice

Thunderbird forces me to use the new amount hub. And I get authentication error when trying to setup outlook.com email

Hello!

I have installed Thunderbird 150.0 on an Ubuntu 24.04 desktop using a downloaded TAR installation method. I have done this, as I use OWL for Microsoft Exchange accounts. OWL works better with the current version of Thunderbird.

I have created a desktop launcher (thunderbird-150.desktop), which works fine, except that the software icon is the generic Gnome gear. I have read that specifying the WMClass correctly in the launcher file (in /usr/share/applications) is the solution, but this does not seem to work. It is current set as WMClass=thunderbird. I have also noticed that the /opt/thunderbird/icons folder does not contain the Thunderbird icon.

Can anyone help me to fix this annoying issue?

Many thanks!

Hello!

I am using Thunderbird 140.9.1esr (64-bit) on a Ubuntu 24.04 system. Every time I restart Thunderbird, it reverts to a little used Gmail account as the default account. I have several accounts, but my main email account is a MS365 account. I reset the setting, but every time it is restarted, the default goes back to Gmail. I have tried everything that I've found online, but cannot correct this behaviour.

Do you have any suggestions or assistance?

Many thanks!

ted36

Apr 27, 2026, 10:42 CST

To open Thunderbird I must enter a primary password. This is driving me NUTS. When I open the program, I want it to start without having to remember a password. Also, if something happened to me, nobody else in my family could open the program without knowing the password and how to find it if needed. After many decades of using this program for email, this primary password nonsense has become a great annoyance. FIX THIS STUPID PASSWORD PROBLEM. Please.

I'm tryin the best way to ask this question... I've always had my freenet address associated with the local folders. I also have a gmail address. This time when I reinstalled thunderbird and used my previous profile it separates the freenet address and the local folders. So now when I get a new email it goes into the freenet inbox but that is not where all my older mail and subfolders are - they are in local folders and the local folder is not getting any new mail. This is distressing because I organize my mail when it comes in and now I have two different places where my mail is.

The gmail is unaffected.

I have tried installing twice and same issue.