Thunderbird Community Forum

I'm back with an old problem.

When filtering email, it gets interrupted with the error message of:

"The folder "xxxx" could not be found, so filters associated with this folder will be disabled. Verify that the folder exists, and that filters point to a valid destination folder."

Yes, the folder exists.

The previous solution was to change the mail server to imap.googlemail.com. I did that, but connectivity to it has become erratic (it services Germany, Poland, and Russia).

Is there anything else I can do besides use the imap.gmail.com server and keep reenabling the mail filters?

Thunderbird doesn't carry over calendar events alerts/reminders after updates to it or reboots generally, at least in Ubuntu (24.04).

I expected my events and reminders to carry over even after updates and computer reboots. They don't. I missed an important appointment because of that oversight. Thunderbird used to work.

I doubt that there's an existing fix for this, so Thunderbird Calendar needs to be updated so that Calendar events alerts don't disappear after updates or reboots. Meanwhile, I'm looking around for email and calendar apps that don't have this problem.

Thanks

My 'sent mail' has suddenly all disappeared - although still on the mail file server. Inbox mail is fine - but if I send a test message to myself, I get the reply, but the sent message is not saveb. I have uninstalled and reinstalled Thunderbird twice, n - the second time deleting the Mozilla folder under C:\users and then rebooting This happened whilst I was using Thunderbird. I have used Thunderbird for years without problems I have run a virus scan with Malwarebytes, but no problmes showed up. All folders are still vixible on my iPhone

I am about to try reinstalling again. I don't want to have to change email clients.

Any help much appreciated.. Thank you Joan Kemp

Sent mail has suddenly vanished, even though it is still on the originating file server. This happened very suddenly. I uninstalled and reinstalled Thunderbird, but no change. I am about to reboot PC to see if this will solve the problem. Very strange!

As you can see in the screenshot, the umlauts are missing in many emails. Unfortunately, the corresponding fonts can no longer be set in Thunderbird; I use version 140.6.0esr (32-bit). Where can I set that ä, ö, ü, ß (...) are displayed normally? Greetings from Berlin, Markus

Windows 11, Thunderbird 140, How to increase the"New Event" box and its Font

- Windows 10, the size is OK

- I have 'Googled" this problem and there seems to be no answer.

Kind regards: Gary Shaw

Quand l'envoie une PJ avec un compte qui a smtp.free.fr, j'ai le blocage "L’envoi du message a échoué. Le message n’a pas pu être envoyé car la connexion au serveur sortant (SMTP) smtp.free.fr a expiré. Veuillez essayer à nouveau." Si je l'envoie avec un compte qui a smtp.sfr.fr, je n'ai pas de problème ! Je suis en Thunferbird 146.0.1 (64 bits) sur Windows 10. Merci de votre aide.

Merging an installation I need to move emails from a local folder to my inbox folder and sent box folder. When I try to do this the menus seem to permit it but the emails don't move. Why might that be?

I'm using Thunderbird in Polish language. After upgrade to ver. 144.0.1 folder names for my only IMAP account have changed into English and fonts into capital (except inbox folder name). Attached screenshot shows discribed case in red frame - capital names are in Engliś and inbox is in Polish. Below in green frame there is my POP account and folder names are correct.

Is there any hope for us to have syntax which allows for advanced search through all the folders of a different account? Something that allows powerusers to type something like: "from:XXX to:YYY subject:"foo" after:20d" and get results?

I'm currently parsing all my email with notmuch locally to get something like this. It would be great to be able to get this type of functionality in Thunderbird natively. There are some adons that I have found but they seem like hacks; search needs to be super reliable.

• Apologies if this is has been asked before!

Apparently it's possible to select different notifications or warnigs for events, it is possible to define one time by default, but also add anothers, but that does not work at all, it only accepts the one selected in calendar.alarms.eventalarmlen

Hi, I am using Fibrus email (network name is xxx and network key is yyy). Fibrus uses eero as a modem. I cannot work out the correct server settings in Thunderbird as there doesn't seem to be a place for 'network key'.

Most grateful for any help you can give me.

Simon

(Personal info removed by moderator)

COMCAST Outage 2025 12 17

After finally getting my TB installation up and organized (v140.6.0esr), COMCAST/XFINITY just acknowledged that they are having issues with 3rd party email programs. At least with Mozilla Thunderbird. Sheesh!

Config editor has no printer listed. nothing to reset. Printer works with other applications just not TB. Re-installed the printer. Reset the space limiters, which I found were set too low. Restarted TB and computer