Thunderbird Community Forum

Hello! I don't understand what's happening with the folders... I've been using Mozilla Thunderbird with this setup for a long time. I had a RedMine folder and a filter configured to move messages from the Inbox to it. But recently, the filter stopped working because it couldn't find the folder on the server, even though I could see it in the folder tree and in the web version of Mail. I deleted the folder and created it again. I enabled the filter, and the messages moved, but they weren't moved to the new folder, but to the one in the Trash, and the new one remained empty. Yes, I restarted Thunderbird, and messages started moving to the new folder, but I don't understand why this happened in the first place—why did I have to delete and recreate the folder?

I used to use Foxmail as my email client. When writing emails with oversized images, I could right-click the image and select the "Auto resize it to proper size" option to make the image easier to read. However, I can't find the same function in Thunderbird. Do I need to use an extension, or is there another way? Can someone please help me? It's really frustrating.

Установив цветовую метку и после обновить, то данные пометки сбрасываются и сообщения снова становятся белыми Проблема возникла примерно после 12 часов по МСК и продолжается до сих пор

Можно воспользоваться кнопкой "Получить сообщения", после ее нажатия также слетает цветовая метка (скрин)

I had to recently change my password on my shaw email account. Now thunderbird won't download my emails. I changed the password in the account settings to match the shaw email account password but I keep getting an error message: "Host contacted, sending login information..." and then after a long delay the error message reads "Login to server pop.shaw.ca with username ... failed". Any idea what I'm doing wrong by simply changing the password? I think this happened before and some wonderful human on this forum told me I had to put something before the password or click/unclick a particular box, but I can't find that old answer to my previous question. Thanks in advance for any help someone can offer!

I have forgotten my password and even my username in Thunderbird mail. When I try to get a new password, they send it by email. Since I cannot get into email I do not get the code. I want to completely remove my account from the server so I can start fresh. This takes me to username and email + password. I enter the new details and the server having not deleted my account sends, "Incorrect email or password. This is why I want to delete it completely so I can really start a fresh setup. I am using Ubuntu 2404.

Thank you for your help.

Rod.

After first pressing "Mark" (K), the shortcut keys for "Mark as Junk" (S) and "Star" (S) are the same. Previously, the shortcut key for "Mark as Junk" was (J). Please make the necessary corrections.

最初に「マークを付ける」（K)を押してから、「迷惑マークを付ける」（S）と「スターを付ける」（S)のショートカットキーが同じです。 以前は迷惑マークのショートカットキーは（J)でした。

修正願います。

My old Widows 10 computer died. All I have left of it is the last full Acronis 2020 backup. I have installed Thunderbird on my new Windows 11 computer and want to restore my Profile data from the backup. How do I find them? Have been searching for days and can't find anything like in your profiles help article.

If I can't recover the data can you at least send me my current license key?

I want to configure an automatic response to emails that have been forwarded to me from a particular address. I have created a template for the response and it is saved in the Templates folder. I then attempted to create a Filter Rule to send the response. I believe there should be a Reply with Template option in the Perform these action pull-down, but there isn't. I've attached a screen shot to illustrate this.

I'm using Thunderbird 154.0 and Windows 11. Is there a new way of achieving my objective?

I have had Thunderbird from the time I acquired my Mac computer. This week it started to do something new. After a restart I opened Thunderbird. A box came up that says across the top System Integration. The cursor balloons, and hasn't stopped for the time I powered the computer, as least fifteen minutes. You know how the program icons are in a dock across the bottom. With other browsers open, hitting the Thunderbird icon doesn't bring its window into the forefront. This needs either a reset, or possibly a backup first. Is there a quicker way to fix this? Thanks in advance. I am not using a VPN; but I also have Thunderbird on my Windows 11. You might have seen a more recent thread on that installation. I included a screenshot. It was easier here to do that than on the Windows 11. On the Mac, I just had to use Activity Monitor to close out of Thunderbird in order to get its version.

I have a smartcard with email signature and encryption S/MIME certificates. I recently updated the signature and encryption certificates on my card and was having issues getting TB to read the encryption certificate. Both the signature and the encryption certificates check out fine with the certificate issuer (IdentTrust), can be read by Windows, Edge, and Firefox Certificate Managers, and works fine for authentication to websites. I am wondering if I accidentally deleted the encryption certificate in the TB Certificate Manager, as the signature certificate (having same issue date and email address) is visible but the encryption certificate is not found. To see if I could restore access I have tried replacing existing profile files having dates prior to the new certificates for:

cert9.db
content-prefs.sqlite 
key4.db
permissions.sqlite
pkcs11.txt
prefs.js
SiteSecurityServiceState.bin

This restored my settings for my previous (now expired) certificates but still does not allow me to view the encryption certificate in Certificate Manager. I also tried removing the logins.json and logins-backup.json files which had no effect on ability to view the encryption certificate, and tried adding the certificate ID .

I'm hoping someone could explain what the TB Certificate Manager does when when accessing and deleting a certificate from a smartcard (it can't electronically delete it without the middleware - in this case ActivClient, and the missing certificate still remains as other apps can still access the certificate in question). I surmise that the name must be stored somewhere, and hopefully by editing the appropriate preference setting I can restore access.

The 'new' Thunderbird doesn't allow a password entry in server setup and will not prompt me for one. It pops up a Windows toaster message saying it can't connect - obviously. I set the advanced options to not remember the signon but still no success.

With a new Windows11 install on a new drive, I can't get my saved emails, folders, and passwords to my new Thunderbird installation. I tried copying the profile folder from my old Windows10 per instructions, but Thunderbird doesn't recognize it on this new Windows11 install.

Every 10 minutes, your Thunderbird app generates an attachment (nmsa) that McAfee deems a Trojan and quarantines it. I get 15-20 popups from mcafee every hour. If I close Thunderbird it stops. What can i do to stop this from happening?

Trojan:Win/SuspiciousAttachmentScript.a

C:\Users\ken_s\AppData\local\Temp

I tested out the incoming and outgoing security server and they both are successful at SSL/TLS but I still cannot send email. Is there anything else I should check?

Back when W110 went to w11 I got a new computer and was given great directions here to back up my TB profile by searching %appdata% and copy the thunderbird folder to external source. That file is 198 MB. I do this every month now ..It is my understanding it saves my profile and all emails including local ones. Now in Aug 2026 when i copy this file, I am getting an error a file is too long and have no choice but to skip that file..I will attach a pic of the error. Is this back up ok to use or is it corrupt because of the error?

I also found in TB help there is an export feature in TB to a zip file but that .zip is huge..I did one just in case. I think you just open TB>select hamburger menu three lines on top right>tools>export. I did that back up/export also today and that is a .zip file folder that is less properties like 175 MB.

So now which way is the correct way to keep a safe copy of my TB in case my computer crashes or i have to put on another pc?