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?

Continuation of my prior post: https://support.mozilla.org/en-US/questions/1516342

Thunderbird has a routine problem with being unable to log into various mail servers. I have four accounts and they all seem to share this problem.

Most recent update: I've tested this in Windows Safe Mode, and the problem has not appeared. Since I can't do any useful work in Safe Mode, it's hard to give it a thorough test, but so far so good. Also, I have removed AVG antivirus because it was redundant. I have seen no improvement since it was removed.

Can this problem be resolved?

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.

Hello, I just moved my email host from Microsoft to Bluehost and I am having trouble getting Thunderbird set up correctly. I can send and receive from Bluehost webmail, and I can receive in Thunderbird, but not send. I can reply successfully, but all sent mail from Thunderbird shows as sent but never arrives.

I am running Windows 10 and using Thunderbird 140.7.1esr

Any help would be great. Thank you!

John

We have our accounts on one computer and one dedicated email (using Thunderbird) which sends our invoices to our customers in PDF format as an attachment to an email. This stopped working a few days ago. The tech department of our accounts package supplied by Benchmak/Snip has looked at our system and the only thing they can suggest is that the emails are being blocked because may be Thunderbird thinks they are SPAM. We have been using this system for a couple of years now and has been fine. We can send and receive emails to/from this account, it's only the PDF attachments of invoices which isn't working. Can any one help please, thank you.

Having used Outlook for over 20 years I have over 500 folders and thousands of emails. Is there a way to tell how many folders and emails I have? Can Thunderbird handle such a large import, maintain my folders and their hierarchy, and the maintain the emails stored in them?

I use Pop3 and have about 30 email accounts. Is that an issue? Does Thunderbird import all of the account settings?

Can I run both Thunderbird and Outlook simultaneously to determine if Thunderbird has imported everything and the migration is complete and fully functioning?

I read someone had a problem importing because their Outlook was 32 bit versus 64. How do I tell if mine is one or the other?

Do you know of any other import issues/problems?

I am setting up Thunderbird on a Win10 machine, and am having a lot of trouble adding accounts that I did not have on the two Win11 machines I have set the same accounts up on.

When adding my 2 GMail accounts, after clicking "Allow" on the OAuth popup the button would go grey the window would stay open and not close, and the account would not be added.

Changing the general.useragent.compatMode.firefox option to TRUE allowed me to progress and finally add those accounts.

I am now having the same trouble with my @hotmail.com account. When I add the account, the dark blue OAuth window pops up, but is completely empty, and there is nothing more I can do.

Things I have tried

• Reverting the above config change
• Checking that cookies and JavaScript are enabled
• Checking there is no saved password
• Used both the Account Hub and the default dialog, with the same effect.

Thanks in advance!

When my message filter uses the "Reply with Template" action, the reply e-mail is always PGP encrypted, even when I do not have any public key for the recipient e-mail address. As a result, the reply e-mail is always corrupted.

I am using Thunderbird 140.7.1esr on Windows 10.

I have attached a screenshot of what the reply e-mail always looks like.

In the Template that I am using, the "encrypt" button is not selected, and in the OpenPGP menu of the Template, the "Encrypt" menu item does not have a checkmark next to it.

Does anyone know how I can get Thunderbird to send reply e-mails without using encryption?

All the folders, Inbox included, disappeared from one of my outlook accounts. It's OK everywhere else so I decided to remove and re-add the account in Thunderbird but now I can't add it again.

I get the error. "Authentication failed. Please check the username and password Exchange auth error"

I know the Username and Password is correct.

Solution appreciated, please.

My junk email has increased dramatically lately. I'm sure it's just life on the internet but I'm trying to figure out if clicking "unsubscribe" actually does anything. I've been putting all the emails that I click "unsubscribe" into a separate folder. I'd like to sort the folder by the email address of the sender. However, when you click on the "from" selection in the message window it gives you the entire entry that the sender put in the send section. In other words I see "The Scary Law, Thomas T. from NFE <daily@today.newfinanceera.com>". Is there a way to get a column that just shows the "<daily@today.newfinanceera.com>" so I can sort on that item?

[edited]@btopenworld.com

Help

I really have given up on Thunderbird, even though I have been a loyal supporter of the product for many years.

For the last year I have had to bypass Thunderbird and read my emails either on my mobile or directly from the BT server, which is how I am writing this mail.

My problem is , although I can view my mail perfectly on my mobile and of course on the BT server, Thunderbird seems totally incapable of transferring the mail to the Thunderbird inbox.

Thunderbird is not able to show the text and any images, all I get is a mail with a number of boxes, no pictures or anything of any use.

Is this since a Thunderbird 'update' or what, I don't know.

A little while ago I posted this problem and only got one reply from an 'expert'/community which failed to solve problem in any way.

I have also lost many of my earlier mail

Is it time to abandon Thunderbird and change to the dreaded Microsoft email package?

Yours faithfully in great expectations that someone somewhere most know how to fix Thunderbird

In Advanced Preferences there are multiple mail servers listed such as "mail.server.server18.hostname". There are at least 18. I have not been able to download messages for 3 weeks and can't figure out why. I have used Thunderbird for many years. Sending email works. Email provider is Shaw/Rogers

Why did retrieving messages suddenly stop. It was working yesterday and I made no changes to anything. I can send successfully. I am using Shaw/Rogers Pop server.

Why does "test connection to server" fail?

Mit meinem e-Mail Konto .gmx.de kann ich keine eingegangenen Mails mehr weiterleiten und auch keine neuen Nachrichten mehr versenden. Nach dem Betätigen "Senden" kommt immer der Hinweis "Postausgangsserver SMTP kann nicht authentifiziert werden.Überürüfe Passwort und gewählte Authentifiziermethode unter Kontoeistellungen " .Ich habe aber nichts verändert und weiß nicht was ich in Einstellungen überprüfen soll oder ändern soll.