Thunderbird Community Forum

My Thunderbird crash whenever I tried to "save as" an email, save the attachment of an email, attach a file to an outgoing email.

Every time I did the mentioned, Thunderbird prompts the normal window of my laptop's folders, but it disappear in a second with the Thunderbird crash and quit.

This situation happened after I installed MS365 on my laptop.

I did try the below: 1. Reset attachment directory - mail.compose.attach.dir 2. Run in trouble shooting mode 3. Repair folder index 4. Clear cache

Anyone can help please?

I now have 2 accounts in Thunderbird: Local (which has years of folders, but stopped receiving email from my Web mail provider) and my webmail Provider that does not download it from the provider. He claimed it is more modern and safer to synchronize across all devices and keep stuff on the web Mail application. I prefer to keep all my folders and emails on my local computer. Should I use POP? iMAP? to do that? Thanks for your assistance?'

Does TBird support plus addressing?

Scenario: I want to reply to email sent "To: markfilipak+joe@...". To do that successfully, in the "Write" dialog, I have to click on "From", scroll down to "Customize From Address...", click it, and add "+joe". (There is a menu alternative: "Options","Customize From Address...".)

If I forget to do that, then my reply does not have "+joe"; it goes out "From: markfilipak@...".

The Issue: When Joe replies to _that_ message, it does not have "+joe", so Joe's reply is trashed. (It's trashed because a filter I wrote automatically deletes messages that do not have "To: markfilipak+<something>@..." in the header.

The sensible way to handle plus addressing is for TBird to recognize plus addressing and to automatically make my "From" header from Joe's "To" header. That way, "+joe" will always be there.

Is there a way to do that?

Thanks Folks! -- Mark.

"Your Thunderbird profile cannot be loaded. It may be missing or inaccessible" keeps appearing mid-screen. version 147.0.1 re-installed several times (Win-10). Transfers of profile attempted from operating PC (Win-10) Cannot locate profile even in a "fresh Install" although the shortcut appears on screen and other associated files seem to be installed. Helps have been downloaded and tried. Same issue. I've received help suggestions from Lin and sfhowes both on 2-6-26.. Thanks for your help.

Running Thunderbird 140.6.0esr in Windows 11. This afternoon I found that one of my three accounts no longer shows up in the folder pane, though it still appears normally in the account settings tab. I can still send mail from it, but can't receive any. The other two accounts appear in the folder pane as usual and can send and receive normally.

Any help getting the account back into the folder pane would be appreciated. -- tralfaz

I am trying to create my outlook.com account in Thunderbird. I see the Account Hub box, and have typed in my email address. But when I type in the password, I get an error message, "Authentication failed. Please check the username and password". It then says, "Exchange auth error". I have checked and double- and triple-checked the spelling in the email address and password, and signed in to my email via the Microsoft outlook.com page using the same email and password. I can sign in to my email using the latter method, but Thunderbird keeps giving me the same error message and won't create the account in Thunderbird. What am I doing wrong?

I used Thunderbird for many years, but starting in August 2025 it stopped working. It was getting an error in the smtp server, and I was unable to resolve that issue. When I try to login to Thunderbird now, it tries to send a message to pwrichcreek@twc.com, but that no longer exists. Thanks for your help.

bold textI recently had my computer get stuck in the "automatic repair" loop making it impossible to boot up. I restored a several months old back up onto a different hard drive. I can boot on the new hard drive, but Thunderbird is missing several months of e-mails. I have tried importing from the old hard disk, but IT DOES NOT WORK. Alll it does is create a new "Local Folders" with nothing in it. I have tried exporting the old profile to a zip file, but it is 14 GB, more than Thunderbird can handle. How can I import the old e-mails into the working version of Thunderbird on the new hard drive. Please, do not say "use the import function" as i have already found it does not work.

Hi, I have followed the instructions for incoming and outgoing servers to convert my Juno Webmail to AN MBOX FORMAT and bring it over to Thunderbird. However, it is not syncing up to Thunderbird and bringing in all of my old emails from Juno.

Any help you can offer with this situation would be greatly appreciated.

Thank you

Carla

I have AOL mail in IMAP. I received both regular and junk mail successfully. Then, I started not receiving the junk mail but still receiving the regular mail. Now the spam folder is empty and I see junk mail when I go to AOL mail through the web but I do not see this mail in the spam folder like I used to. I tried deleting the AOL account in Thunderbird and reinstalling it but that made no difference. What can I do?

I can't login to one of my email addresses. It says login to server with username failed. I tried all of the suggestions (using a pop server for example) and none of them seem to work. Please help.

After creating an email message, I click on attachment button to attach a file or pdf document to the message. The file explorer screen opens for a second then closes, giving me no opportunity to attach anything.

Hello - I'm trying to transition from Outlook desktop to Thunderbird in Widows 11, but the setup fails (just stops) when I try to import my Outlook pst data. Ive tried the Outlook scan and repair tool - no luck. My file is quite large - about 20GB. Is that the issue? Is there a workaround?

Thanks for any suggestions.

My emails that are in Sent or All Mail are all out out order by date - random - different dates. I don't know what happened? I expect to see the most recent first - just as i do in my inbox. It is ok. They are fine in Gmail - where they come from. Thanks

I have used Thunderbird for a long time?

Hi, i installed Thunderbird on macOS and it worked until yesterday. Today it continue to fail connection with the google server. I tried restarting computer and close/reopen Thunderbird but nothing is working. I also tried to limit connections from 5 to 3, and nothing happened. Can you help me ? I don't have network problems.

I have got two e-mail by Thunderbird : X@orange => OK but X@kohinos.net NO connection Thunderbird said : connection time exceeded'. What to do?

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I have a local folder which has 90 folders within it. These are folders brought over from Eudora (the mail system I used before Thunderbird). It would help me if I could easily move all 90 from their current "Eudora" folder to the big "main" folder that Thunderbird has. To make it clear what I'm asking, here's an example, using two folders, Danbury and Fritz.

D (folders whose names begin with D) Eudora folder, which has two folders - Danbury and Fritz F (folders whose names begin with F)

Is there any way to move the 2 folders that are currently within the "Eudora" folder so that they're "first level" folders. In other words, Danbury would be among the "D" folders and Fritz would be among the "F" folders.

The only way I know to achieve this is by manually creating the new folders, moving the items from the old folder to the new folder, and then deleting the old folder. This is cumbersome.