Frontier uses Yahoo for email, and as with other ISPs, you may have better luck using these settings instead of the frontier.com servers:

incoming IMAP/POP server: imap.mail.yahoo.com/pop.mail.yahoo.com port: 993 for IMAP, 995 for POP security: SSL/TLS authentication: OAuth2 User Name: email address

outgoing SMTP server: smtp.mail.yahoo.com port: 465 security: SSL/TLS authentication: OAuth2 User Name: email address

If you want to try these settings without changing your existing setup, create a new profile from Help/Troubleshooting, about:profiles, and add an account. Your original profile is unaffected. OAuth2 for POP requires TB 68.5. If you change the existing frontier.com servers to the Yahoo servers, delete the old passwords from Tools/Options/Security/Passwords/Saved Passwords, restart TB, and enter the account password when prompted.

See this topic for a similar issue with Sky, another Yahoo-based email service.

To SFHOWES:

Thanks for your help!

I tried using your suggested settings. POP was used before my troubles started, so I continued with POP and your suggested settings. Screen prints are attached. I deleted the password, exited TB, & relaunched TB. "Get Messages" still didn't get any new messages. I was not prompted at all.

I then tried the same procedure except using IMAP. When I clicked "Get Messages" it tried to connect to the IMAP yahoo sever but it timed out.

Should I try uninstalling TB then reinstall it? If so, to save all my old email, would it be necessary to export Inbox, Sent, Trash, etc., then import it all after the reinstall?

Ed

When you tried IMAP, did you add it as a separate account or just change the server settings to IMAP ones? Changing from POP to IMAP requires adding it as IMAP. But I don't see why the POP settings in your pictures didn't prompt for the password, if you have TB 68.5. What is your security/antivirus program?

Uninstalling and reinstalling the program won't help in this situation.

To SFHOWES:

Thanks again for your help.

I have fixed TB now, but I don't understand of how I did it. Do you understand why the repair happened when I used "Remove" to delete the oauth line in "Saved Logins"?

(At the time, I was very surprised that this worked.)

Do you understand why my troubles began when I changed my password in TB "Saved Logins"? (I used the method of, “https://support.mozilla.org/en-US/kb/password-manager-remember-delete-change-tb”)

Below are images of the emails from Yahoo that originally alarmed me enough to change my password.

I recently got another email from Yahoo like first one below. Do you understand why I am getting these?

Thanks, Ed

When you remove the oauth token and restart TB, the OAuth browser window appears, you enter the account password, and a new token is stored in the password manager. A message like the ones in your pictures is sent to the account and also to the account set as a backup in Yahoo settings. This is normal and guards against unauthorized use of your account. I received a similar one today after resetting a password.

sfhowes said

Frontier uses Yahoo for email, and as with other ISPs, you may have better luck using these settings instead of the frontier.com servers: incoming IMAP/POP server: imap.mail.yahoo.com/pop.mail.yahoo.com port: 993 for IMAP, 995 for POP security: SSL/TLS authentication: OAuth2 User Name: email address outgoing SMTP server: smtp.mail.yahoo.com port: 465 security: SSL/TLS authentication: OAuth2 User Name: email address If you want to try these settings without changing your existing setup, create a new profile from Help/Troubleshooting, about:profiles, and add an account. Your original profile is unaffected. OAuth2 for POP requires TB 68.5. If you change the existing frontier.com servers to the Yahoo servers, delete the old passwords from Tools/Options/Security/Passwords/Saved Passwords, restart TB, and enter the account password when prompted. See this topic for a similar issue with Sky, another Yahoo-based email service.

Created a new profile per the instructions and can now send email! Thanks for the info. Did not type in the config info, TBird automatically configured it and it matched the info you gave:

Server Settings:

 Server Name: pop.mail.yahoo.com, port 995
 User Name: <my email address>
 SSL/TLS
 OAuth2

Outgoing Server (SMTP)

 Description: Yahoo! Mail
 Server Name: smtp.mail.yahoo.com, port 465
 User Name: <my email address>
 OAuth2
 SSL/TLS

It's not clear how to get back to my original profile, since TBird not starts up with the new profile. I would like to be able to go back to the old one to see if the new one is missing any emails. Hints?

Thanks again, Greg Wolfe

Never mind about switching profiles ... googled "thunderbird switch profiles" and was directed to the support page describing how to do this. Thanks again.

Gregory J Wolfe said

It's not clear how to get back to my original profile, since TBird not starts up with the new profile. I would like to be able to go back to the old one to see if the new one is missing any emails. Hints? Thanks again, Greg Wolfe

From Help/Troubleshooting, click about:profiles, and in the profiles tab you can launch another profile, set the default, etc. Note that with POP accounts, the mail that's downloaded depends on what is on the server and what's already been downloaded, and whether the account is set to delete from server after download or keep on server.