Thunderbird gemenskapsforum

I have a Windows 10 machine, have been using Thunderbird and pobox for years.

In case you're not familiar with pobox, it is a mail forwarding service; I pay for an email address and they forward email to up to three servers. I've thereby kept the same email address for a very long time, just changed the address(es) they forward to as I change ISPs, etc. At some point I quit using my ISPs server for my email and just used the one at pobox.com. Pobox was purchased by Fastmail, and so they have some new server names; my old ones have continued to work on my current system.

I use POP3 instead of IMAP because I want the email on my machine, not on a server somewhere. I configured Thunderbird to do this long ago, and so I don't remember details; I've been depending on being able to extract any needed information from its configuration. I am confident I have the password correct; I can log into the web interface to my email, and the password works there.

My new machine is a dual-boot Win11/Ubuntu; my plan is to use the Ubuntu machine almost exclusively and only boot Win11 when necessary. I want to move email operations to the new Ubuntu machine.

I've read info on moving Thunderbird; I find the profiles on the source machine, move up two directory levels, find the equivalent directory on the new machine, copy with replace. I found:

c:\Users\name\AppData\Roaming\Thunderbird

on the Win10 machine, and

Home/snap/thunderbird/common/.thunderbird

on the Ubuntu machine, so I copied the files from the first to the second.

Having done that, when I start up Thunderbird, it displays a page saying "Set up your existing email address". If I do that, of course, it will create a new profile, and I still won't have the old one. I've tried creating it manually, but (a) I don't know how I will then merge it with an old profile and my thousands of email messages, and (b) I'm having trouble figuring out the incoming and outgoing server settings. I remember struggling with that back on Win7 or whenever it was.

Anyway. Anyone got suggestions on what might be going wrong here?

That's a weird one, but I did some testing, and I am sure it is some problem with my Thunderbird or configuration.

Here is what I do. I received an email. I reply to it. I see the reply in the Sent folder. Then I click on the reply and choose to reply to that (as a follow-up email). I verify the recipient is correct and send it. They received my email, but I can no longer find it in my Sent folder. It is nowhere to be found. Tested with another email client - everything works as expected.

Does anyone have a clue what I am doing wrong??

When using shared group calendars (as it's commonly found in small companies) all events that are marked as "public" are visible with details on personal calendars that are shared on some public calendar. Changing to "private" solves, but one need to remember doing this while creating an event.

It would be very useful to have an option for switching to "private by default" when creating a new event. Any possibility? Anyone else with the same need?

‘Service provider advised me to go to Cookies & Site Data select Manage Browser button in the search websites bar type themessagingco.com.au then Select this entry from the list and Remove & save’ for ‘Thunderbird’

Hello,

let me tell you that I have a few hundred email filters defined, and they (almost all) work fine.

There are three filters that cause problems, and it looks like the problem sticks to the sender.

Let me expand: FAZ, REWE, and Campact cause problems. Two out of three emails from these senders can't be moved to the target folders. I get a pop-up messeage telling me that I have to repair the folder. I do so, and a few days later the same problem comes up. Just for these three senders.

I searched all folders for filters for these three and removed all filters I could find.

Then I created a new folder as a child to the inbox folder, and a new folder inside of this folder to hold emails from FAZ. I defined a new filter rule, as the old ones were removed. Worked for a few emails, and, voila, the message pop-up came again, telling me there are problems moving the email over to the (new) target folder.

Let me repeat: all other filters work fine, just emails from these three senders cause problems.

Any idea where I could have a look, a switch to check?

One last information/idea: all three have different email addresses they send from, I will check the ones that do not work, maybe there is a clue.

I am using POP3/SMTP, not IMAP.

Hoping for a tipp, a clue, an idea -

Georg

I saw where there was a same problem liste a couple of months ago but the solution did nto work. As of this morning I can no longer send with my CompuServe Account. There was no change in my settings, and I have had the account in place with Thunderbird for years. I get an error to enter my password again, I do, then no luck. It asks again. When I cancel, I get an alert, sending of the message failed, Unable to authenticate Outgoing Server (SMTP), please check the password and verify the "Authentication method" in "Account Settings|Outgoing Server (SMTP)

I tried change the password authentication from normal to OAuth2. No luck.

No problem with downloading messages; they all come through.

I saved the message to be sent in my Draft Folder and then when going to the web version of CompuServe (really AOL and really Yahoo), my message is saved in the Draft Folder and I can then send it.

Thank you in advance.

Sal

I am getting an error for an outdated certificate on my mail smtp server and when I try to add a security exception Thunderbird does absolutely nothing when i click the button to add a security exception where I can send mail. I end up having to cancel the window and discard my email. It will also not go view the certificate and if you ask it to check it just hangs up forever in and endless loop of checking.

I have used Thunderbird for many years and have over 11 years of emails on my Linux laptop. I'm moving to a Chromebook and have installed Thunderbird on it. It is working fine. I only want to transferr about a years emails to my new machine so the "folder transfer " mention is not good. I have tried the import / export method but every time I select a group of emails of about a year the resultant zip file is about 10 gbyts and the import will not work. Thank you for any assistance you may give

Paul

Won't connect to Host Server. The error notification window won't allow me to get back to the app to check settings. The only option given is "Try Again". I don't know why it all of a sudden won't connect, because my iPhone connects just fine

Thunderbird 145.0 (64 bit) with Windows 11 Pro.

In the message editor window, new message or reply or forward, when I want to insert a hyperlink using either CTRL+K or via the Insert menu, a popup window to insert the link into does not appear, and the write windows hangs. Becomes unresponsive. The only way to close it is by ending the task in Task Manager. I notice a crash helper in the Thunderbird group in Task Manager. Everything is on 0% CPU though.

What went on before this is that I modified the property editor.link_color in the config editor (because links are not readable in dark mode, but that's a different story). I then did reset it to default and restarted TB, then pc and TB, that did not help.

In troubleshooting mode, there is no problem. In normal mode, I deleted the only plugin I had (a theme) I cleared cache, refreshed Thunderbird, to no avail. It's not set up to generate crash reports yet.

I have TB on another machine (W10 Pro), I can copy my profile folder over quite easily.

Any suggestions please?

(I'm on Central European time, it may be a day or so before I respond to replies from the US.)

I'm on 140.5.0esr version of Thunderbird (up to date). Been a loyal user for a long time. As of 11/26/2025, I have been unable to collect my email from the portal server. I'm able to send but cannot download new messages from the server mail manager. I've reviewed the settings with the portal managers and all looks good on their end. They suggest connecting with my email client provider to find a resolution. I'm on a MacBook Pro, Sonoma 14.7.4. Can anyone help?

I recently switched to a new monitor. When I hover over a picture, or the subject of an email in my email program, I get a display of the alt tag. The print is too small. How do I enlarge the display of the alt tag?

Thunderbird is not working with mitchells new version. I am getting a MAPI.Send() returned -2147467259. How do you correct this? Mitchell is saying it on your end.’ for ‘Thunderbird’

After many years of using Thunderbird with an AOL account I changed my password in AOL to increase the security. So I had to install the AOL account again in Thunderbird. I created an app password in AOL and put it in Thunderbird. Everythin fine so far. AOL login window opens automatically. But after login to AOL the message "somthing went wrong" and "try on anther device" pops up. I tried it on several PC's - no way. Other mail clients like Mailspring oder Mailbird did work with the AOL account. What is the problem?

Hi

I'm using Thunderbird 140.5 on a desktop Mac running Sequoia 15.7.2

In Local Folders, my subfolders have subfolders. In both levels of subfolders, Thunderbird has spontaneously started disordering both newly created subfolders, and folders which I move from one subfolder to another using right click 'Move To'

Up until ten days ago, all folders whether new or moved, were listed alphabetically. Now, day by day, the disordering is getting worse and as someone with ongoing conversations with hundreds of clients, it is becoming impossible to work when I have to give so much time to slowly scanning through every folder looking for the relevant subfolder.

I don't know why I can't update this version, but I tried installing the newest version available (145) and used the 'reset folder option' which did not work either.

Also, setting up a whole new account instead of upgrading my existing account is a colossal faff and I'd rather not have to!

Aside from manually reordering (also a colossal faff), can anyone suggest something I might be missing in stopping this happening?

Thunderbird says I'm on an esr channel, if that helps

Thanks

I have switch to Linux Mint. My laptop with window 10 cannot go to Window 11. I therefore am retiring this laptop and gone to Linux Mint on a Mac machine. I have Thunderbird as my email. I have not been successful sending my emails to this new system. I downloaded Thunderbird on the new machine but cannot get my emails

I just created a new email account in Thunderbird. I've used T-bird for 15 years. Normally, when I highlight an inbox email and then press the keyboard "Delete" key, the message is sent to Trash. But on this new account, when I press Delete key, the message briefly disappears, but then comes back into my Inbox. It doesn't go to Trash.

I checked the Server setup and confirmed it is setup to move Deleted email to "Trash on xxx@xxxx.com"

I must have changed something because T'Bird no longer starts. I was trying to copy TB file from Win 10 to a Win 11 PC. That failed because some files could not be copied. But now TB is not starting up. I checked the Start folder and it is in there.

Suggestions please.

Hello! Since a recent Thunderbird update (I think 13th Nov), when clicking on the Thunderbird icon on my taskbar a donation webpage is opened not the application! I went to 'setting>apps&features' but the 'modify' button is greyed-out. How do I change it back (what 'setting' do I need to change)? I really don't want to have to uninstall/reinstall. Regards, Tim