Gmail error Message "The host 'smtp' could not be found. Please verify that you have entered the server name correctly. Account: 'http', Server: 'smtp', Protocol: SMTP, Port: 25, Secure(SSL): No, Socket Error: 11001, Error Number: 0x800CCC0D" I don't know where to fix at.

Are you using Gmail from their website or from an external email application (Outlook for instance)?