mailparse.php

<?php
/**
 *
 */

$dir = '/home/sotarok/tmp/log/mail/';


$file = (glob($dir . '*'));

$mail = explode("\n\n", file_get_contents($file[1]));
$head = array_shift($mail);
$body = implode("\n", $mail);

$info = array();
$head = explode("\n", $head);
foreach ($head as $h) {
    if (preg_match('/^([^:]+): (.+)$/', $h, $m)) {
         $info[$m[1]] = $m[2];
    }
}

preg_match('/charset=(.+)/', $info['Content-Type'], $chars);
$chars = $chars[1];

//var_dump($info, $body);
echo mb_convert_encoding($body, mb_internal_encoding(), $chars);