Contact Form Not Working

Hi,

When I send a test enquiry through the contact form, it doesn’t send any email to the specified email address. The address that I enter in the form has a failed email in the Spam folder saying

A message sent by

< (Email address hidden if logged out) >

could not be delivered to one or more of its recipients. The following

address(es) failed:

(Email address hidden if logged out)

SMTP error from remote mail server after RCPT TO:< (Email address hidden if logged out) >:

host 127.0.0.1 [127.0.0.1]: 550 Unrouteable address

Any suggestions?