The server response was: sorry, your mail was administratively denied.

If you get this error. here is what you need to do.While sending mail,in the from field use the email address with your domainname say admin@domainname.com.

This problem comes in godaddy shared hosting if you use anyother email address in the from field,user something@domainname.com

if you have any questions please feel to post..

cheers
admin