"An unknown error has occurred. Protocol: SMTP, Port: 0, Secure(SSL): No, Error Number: 0x800C0131"
It's trying to send email on SMTP port 0. SMTP is port 25. There is a setting wrong in your email client.
Cheers
"An unknown error has occurred. Protocol: SMTP, Port: 0, Secure(SSL): No, Error Number: 0x800C0131"