function get_recipients($file) {
$fp = fopen($file, "rb");
$contents = fread($fp, filesize($file));
preg_match("/To: (.*)\n/", $contents ,$to);
return(explode(", ", $to[1]));
}
give it a file name, it gives you an array of recipients. sample use:
$to = get_recipients("file.eml");
print_r($to);