Won't accept password
My dad has a gmail account which I monitor for him. When I try to login to his email from Thunderbird, I get the the message that "sending of password did not succeed". I've re-entered it several times and even changed it but still no luck. I can login to his email on a web page so I know the username and password are OK. My gmail account works fine and I have no trouble with it. Is there a setting somewhere that would prevent Thunderbird from logging into his account? Or any other suggestions?
Chosen solution
Unless you're connecting through a VPN or have an interfering antivirus, it should work if:
the authentication on the incoming and outgoing is OAuth2
cookies are accepted in TB Options/Privacy & Security
Remove the passwords from Saved Passwords in Options, restart TB, enter the account password in the OAuth window when prompted.
https://support.mozilla.org/en-US/questions/1335435
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Chosen Solution
Unless you're connecting through a VPN or have an interfering antivirus, it should work if:
the authentication on the incoming and outgoing is OAuth2
cookies are accepted in TB Options/Privacy & Security
Remove the passwords from Saved Passwords in Options, restart TB, enter the account password in the OAuth window when prompted.