What exactly did you complete?

johnwey said

After 3 years suddently I get this? "Sending of password for user johnweyemails did not succeed. Mail server pop.googlemail.com responded: Web login required: https://support.google.com/mail/bin/answer.py?answer=78754" I went to the URL suggested and completed EVERY step recomended Nothing worked Please help

I checked my Gmail account using Thunderbird

Received the window asking for my password

Entered the password, and received the second error window

You already posted the link to the Google support article. I'm certain the answer is in there.

I went to the URL suggested and completed EVERY step recomended

I'm afraid you didn't.