It's not possible to 'change' a password with TB - only to Edit a stored password that has been changed at the mail provider's website. The best method is to delete the passwords stored in Saved Passwords, restart TB, and enter the new password when prompted. The new password must be created by the mail provider, and confirmed by accessing the account on the provider's webmail site.

Of course it doesn't. You simply supplied the exact same password that Tbird already had and not working anymore. Who is your email service provider and what type of account is it (POP or IMAP)?

When you say that "the new password must be created by the mail provider, and confirmed by accessing the account on the provider's webmail site," what does that mean? I deleted the old ones but nothing happened when prompted to input password. Where do I find the newly generated one? Thank you!

My other email works; the one that doesn't is gmail.

Where would I find out how it was set up--POP or IMAP?

You have to create a new password on the Yahoo, gmail or AT&T site that maintains your account. Sometimes, they will send the info to an alternate account you specified when the account was created. Delete the entries in Saved Passwords, restart TB, and enter the new password when prompted.

With gmail, the authentication in Tools/Account Settings, in Server Settings and Outgoing Server (SMTP), should be OAuth2 and cookies must be allowed in TB Options/Privacy.

Google is making changes to its accounts' security (sign in) options. Assuming you're running the latest stable Thunderbird version (68.9.0), you need to delete the stored password then change the authentication method in Thunderbird to OAuth2.

OK, lemme try that. I can access email fine through gmail; it's just not getting downloaded to Thunderbird.

I do have the current TBird version; just checked.

Where would I find out how it was set up--POP or IMAP?

Get familiar with Thunderbird's account settings here Configuration Options for Accounts. They will help you understand what we refer to when we mention them. Also, see https://support.google.com/mail/answer/7126229?hl=en and confirm you're using the right settings, then troubleshoot sign in problems as per that article.

Where I find the Saved Passwords file ?

Where I find the Saved Passwords file ?

It's not a file, but a button under Options. See Password Manager - Remember, delete and change passwords in Thunderbird

ATT requested that I combine my wireless and email account logins, which I did. The wireless login is no issue and accessing the email outside of Thunderbird works as well but I cannot get Thunderbird to sync up with the new information. I have tried changing the account settings, verified the email settings within Thunderbird and even tried setting up a new account using the same information but Thunderbird already knows it exists. I think the easiest solution would be to request a password reset since it goes to a completely different email but I can't seem to find how to do that either. Any suggestions?

U P D A T E

FOR ISSUES USING THUNDERBIRD WITH YOUR AT&T EMAIL ACCOUNT

SIGN IN TO YOUR ATT.COM ACCOUNT

ACCOUNT (top of the page) then Manage Profile

PROFILE Account Settings (left side bottom of the page) Linked Accounts (Link an existing account to your user ID.)

SIGN-IN INFO AT&T Email (right side bottom of the page in red font) Manage secure mail keys

MANAGE SECURE MAIL KEYS Shows your AT&T email account Add a secure mail key (box link) Add a nickname for the secure mail key A secure mail key will be generated. IMPORTANT: Copy and paste then save elsewhere because you will need it to access your email from any other device.

Now, go to THUNDERBIRD and enter that secure mail key as your password.

NOTES: 1. You will not be able to change that secure mail key to another password that would be easy to remember (heck why would we want to do that??). 2. You will not be able to retrieve the secure mail key if you forget it. 3. If you previously set up a secure mail key but don't recall what it is, you can delete (small trash can to the right) and add a new one with the steps above. 4. You can set up secure mail keys for each email main email account you have so nickname them accordingly. 5. This was as of November 5, 2020. I'd like to think AT&T would make this easier to follow at some point in the future but, if not, give this a try and good luck!

See this topic about AT&T: https://support.mozilla.org/en-US/questions/1311728

To access the account with TB or any desktop app, you must generate a secure mail key and use it in place of the regular account password. The regular password may work in a mobile mail app on your phone, but a key is needed for TB.

The topic cited above explains how to enter a new password or key in TB.

I have tried almost everything above. It's all good EXCEPT Thunderbird does not ask for my password. I do not have any saved passwords in the password manager. So, when I start's Thunderbird it looks to AT&T, but is unable to connect with the server and does not ask me for a password.I see from a comment above that you cannot edit a password and Thunderbird, but, I would hope that there is some way of entering the current password (The secure mail key), but that is not seem to be any way of doing it. I tried creating a new account from the existing mail account, but received a message that the account already existed. It appears that I have two choices – – lose all my old and archived emails or set up a new account using the same information, then downloading only the last 60 days of messages that remain on the ATT server. All I really need (I think) is for Thunderbird asked me for my password when it connects to the AT&T server. I could then retrieve the messages on the server And be back in business again.

I have tried almost everything above. It's all good EXCEPT Thunderbird does not ask for my password.

Obviously, there is something stopping TB from connecting to the server before you are prompted to enter the key. It's probably a security app such as Avast, ESET, Bitdefender etc. Remove the antivirus app or run your OS in safe mode to bypass startup apps, then run TB and see if it connects.