Username: email1@gmail.com
Password: <Password>
POP Server: pop.gmail.com
Port: 995
Unchecked Leave a copy of retrieved message on the server.
Checked Always use a secure connection (SSL) when retrieving mail.
Checked Label incoming messages: email1@gmail.com
Unchecked Archive incoming messages (Skip the inbox)

Server denied POP3 access for the given username and password.
Server returned error: "[AUTH] Web login required: https://support.google.com/mail/bin/answer.py?answer=78754"