Mail (), BBC: recipients not receiving my Newsletter

Hi to all, I wrote a small form which dumps data to a php script that uses mail () to send an html newsletter, so far is working except that it's not sending to BCC: headers, in my form I have a field to enter a comma delimited email list, after submiting the form this list is stored under one variable $emaillist, and in my php script I used $headers .= "Bcc: ".$emaillist."\r\n"; then I call mail($to, $subject, $message, $headers); I don't receive an error message but my email list is not being sent, what I'm doing wrong ? Rick Fitzgerald Off Price Closeouts 1700 W 8 Ave Miami, FL 33010 (305) 888 2555 FAX (305) 884 1761