I was attempting to send an email to a business and it kept rejecting the message with the following error message:

An unknown error has occurred.

Subject 'Dog Moms.net Web Inquiry'

Server Error: 451

Server Response: 451 4.2.0 8lFS1o0030GY4pM01lFS73 internal error

Server: 'smtp.atlanticbb.net'

Windows Live Mail Error ID: 0x800CCC6A

Protocol: SMTP

Port: 8025

Secure(SSL): No

Does anyone have any suggestions for correcting this?