php & qmail

Hi I'm trying to build a program using PHP to increase the performance of Qmail. I'm trying to use PHP to send an email qmail-remote which connects directly to the recipients mail server. If this fails it will then add it to the queue normally so it can retry later. Here is what I have so far (Note this runs on the command line) function sendMail($host, $to, $from, $message) { $prog = "/var/qmail/bin/qmail-remote $host $from $to"; echo "Program = $prog \r\n"; $handle = popen ($prog, "w"); // fwrite($handle, $message) ; pclose($handle); } The problem I have is I don't know how to write the message. When you manually run qmail-remote $host $from $to You then have to type the message then press control + D Just like the standard mail function in UNIX How can I type "Message control + D" into the program ? Thanks Kris