SMTP Headers for PHP Mailer

$connect = fsockopen($hostname,$port); 
fputs($connect, "EHLO $mydomain\r\n"); 
fputs($connect, "AUTH LOGIN\r\n"); 
fputs($connect, base64_encode($username)."\r\n"); 
fputs($connect, base64_encode($password)."\r\n"); 
fputs($connect, "FROM:$fromname <$fromemail>\r\nReply-To: $replyto\r\n");
fputs($connect, "RCPT TO:$fullname <$email>\r\n"); 
fputs($connect, "DATA\r\n"); 
fputs($connect, "MIME-Version: 1.0\r\n");
fputs($connect, "Content-Type: text/html\r\n");
fputs($connect, "Content-Transfer-Encoding: base64\r\n\r\n");
fputs($connect, "To: $email\n");
fputs($connect, "Subject: $subject\n\n"); 
fputs($connect, "$message\r\n"); 
fputs($connect, ".\r\n"); 
fputs($connect, "QUIT\r\n");