Create a PHP page and substitute as required.
$MP = "/usr/sbin/sendmail -t"; 
$fd = popen($MP,"w"); 
fputs($fd, "To: $outRecipient\n"); 
fputs($fd, "From: $senderName <$senderAddress>\n"); 
fputs($fd, "Subject: $outsubject\n"); 
fputs($fd, "X-Mailer: PHP4\n"); 
fputs($fd, $outMessage); 
pclose($fd); 
?>
Hope its usefull to you. Good Luck!