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'd like to know how to fix this response?

Check ALL your e-mail account settings.
This message relates to an incorrectly setup outgoing e-mail server.