Hi, 12 months ago I changed part of contact.php so that I receive a copy of any emails sent via my site using this code $to=$rs['email'].',MYEMAILADDRESS'; This has been working great but now all of a sudden I am not receiving any copies, but if I change the email address to my personal one. I get an email saying 'Mail delivery failed: returning message to sender' Any ideas why this could be happening please????? Thank you Jason