Thunderbird Community Forum

While importing a Gmail account, I ended with three Trash folders, only one of which I could delete. Trash goes automatically into the top folder, but bottom one says it's a system folder and can't be deleted. How do I consolidate into the one that Trash automatically goes into, which should be the top one, please?

Thunderbird is displaying the wrong name in the from or correspondents columns in some of my emails. The displayed names that are wrong are from other emails received. For example, one email in the from column is displaying Nancy, but the email is from Grainger with a different email address. I have received emails from Nancy but she is not affiliated with Grainger. This issue is happening with many, but not all, emails. A name displayed in the from column that has nothing to do with who sent the email.

the default font for writing texts is too small for me to easily read. Yet when I send the message the text size too large, How do I control these font sizes independently

The last new email I've received on Thunderbird for one of my accounts was on 5/13/2026 at 12:02 p.m. Every time I open thunderbird it tries to re-download the entire yahoomail account and times out. I have deleted all emails from the yahoo mail box from 5/13 and backwards. All spam emails have been deleted and the trash can has been emptied. Per online instructions I have also deleted the popstate.dat file, tried to repair the inbox file by right clicking on it, going to properties and clicking repair folder. I also tried to compact the folders, and have turned off my virus protection and nothing seems to be working. I also tried a new app generated password from yahoo. Current setup is pop.mail.yahoo.com port 995 SSL/TLS, authentication method = normal password. Any help would be greatly appreciated. Thank you!

Suddenly Thunderbird takes a long time to download even a few (10-20) emails from Gmail and then it freezes on an email and as I click on different emails only the original one shows on the bottom half of the screen, even if I change to a different folder/email account. Also it will not close when I hit the X in the upper right corner.

If I click on one of the other apps, such as Calendar it goes to calendar but when I go back to email it still shows that same frozen email.

I tried clicking on the three bars (hamburger) to find the Thunderbird version and nothing happens.

I have restarted the computer but that has not helped.

This is an add on to the previous portion that I wrote yesterday. Today nothing shows in the portion where I usually view the message after I've clicked on it. Also the options in the tool bar such as File, Edit, View etc. do not respond to a click after the first time I have attempted to look at a message.

I am considering uninstalling and reinstalling. If I do that will it find all my emails and folders etc. again? There are a few emails that I am quite desperate to access that I have put in folders.

I'd really appreciate any help I can get on this as some important work is being delayed until I can access those emails.

Thanks for any assistance!

Hello, Previously, I had my email with Xfinity, but they stopped this service and set us to Yahoo Mail. I’ve had no luck in setting it up in Outlook, so I tried Thunderbird and encountered the same problem. I have Windows 11. I’m using the IMAP settings recommended by Yahoo. During the setup process, everything checks, but when it asks for an address, which is from Xfinity, and a password, which I’m not sure they’re asking for so I tried the Xfinity, Yahoo, and Mozilla passwords. I get the authentication error on each attempt. Help! Thanks, Parris

Thunderbird 148+ on Windows 11 repeatedly prompts for the password when synchronizing an Exchange account (professional) configured with the native Exchange support (no add-on installed).

The account only offers “NTLM” or “Normal password” authentication methods. OAuth2 is not available in the account settings.

During synchronization, Thunderbird asks for the password separately for many folders. However, clicking “Retry” usually works immediately without changing the password, and manually re-entering the same password also works.

The issue then reappears for the next folder, causing continuous authentication prompts (I have many folders...).

Actions already tested:

• deleting saved passwords and tokens,
• deleting/renaming key4.db and logins.json,
• restarting Thunderbird,
• recreating the account.

The problem persists.

This looks like an authentication/session handling issue rather than an actual invalid password.

My trash folder deletes my emails after just 30 days. I want to keep my deleted emails in the trash folder for ever (or almost), but I can't a way to change the period for keeping the emails.

Good morning,

this morning, after logging into my Thunderbird account, all my subfolders from my main account were in the "Trash" folder, and there was no correspondence in them. Folders named "V 2" also appeared in the Trash folder. Could you please advise if it's possible to restore these correspondence and folders to their previous state? I also tried using the "repair folder" function, but it didn't work.

Best regards and have a nice day.

Been using outlook since 2000, I am tyrin to cut the umbilial cord to outlook as it is craper each year that passes.

Can i have more than 1 sig as i use maybe 10 different sigs for different reasons?

I see a use file do i get to choose a differt file when inserting sig or am i stuck with one and have to manualy change file or copy from somewhere else.

Once i get Thinder runnin i wil be happy to support on a monthly basis but i need to se if ti will suffice.

Ich kam nicht mehr in mein Thunderbird. Es hieß immer, dass ich das Passwort brauche. Dieses wurde aber nicht akzeptiert. Bin Laie in den technischen Dingen. Habe die App deinstalliert, da ich mir sicher war, dass das Passwort das richtige ist. Nun wollte ich die App neu intallieren, aber dazu soll ich das Passwort eingeben. Wahrscheinlich hatte ich es doch mal geändert, kann mich aber nicht erinnern, da ich es ja nie mehr brauchte. Jetzt komme ich auf gar nichts mehr, da man das PAsswort eingeben muss und ich erst gar nicht in Thunderbird komme. Wäre aber sehr wichtig, da hier all meine Mails gespeichert sind.

Hi Team, I right click on a message header and select "mark as spam" which then deletes it but it will let another message from the same place in at a later date, is there a way to have the messages I mark as spam go straight to the spam folder?

Thanks, regards Steve

I sent an email to my mechanic today and another site attached a CC to their Website. It is weird I didn't send an email to them support@bloominto.co, yet I received a reply and there was a CC to my mechanic in it.

How is it possible?

Exported ical file from Google Calendar and then went to import into Thunderbird. This previously worked in the same installation. The import failed and the error console displayed the attached message. Restarted Thunderbird. Calendar showed ready and is not read only. Same problem.

If I have a password to sign into my Thunderbird emails, where do I find it. I haven't gotten this requirement in the past so where might I find it now and/or stop those messages?

Hello. Something strange happens in my emails. I read and/or delete an email and then at the bottom of any saved emails, the following shows up: no "from", no "subject" and no "recipient. It only shows 12/31/1969 5:00 pm. It is almost impossible to delete it. If I am lucky, it might finally disappear after closing Thunderbird and starting it again, several times. Becoming very much a nuisance. Thank you.