Not able to configure gmail to retrieve my emails

I am trying to configure to receive emails from contato@casadaestacaomorretes.com.br and always gives me the same error:

Enter the mail settings for contato@casadaestacaomorretes.com.br. Learn more

Email address:	contato@casadaestacaomorretes.com.br
	Server denied POP3 access for the given username and password.
	Server returned error: "Authentication failed"
Username:
Password:
POP Server:	Port:
	Leave a copy of retrieved message on the server. Learn more
	Always use a secure connection (SSL) when retrieving mail. Learn more
	Label incoming messages:
	Archive incoming messages (Skip the Inbox)