Index: branches/version-2_4-dev/data/class/helper/SC_Helper_Mail.php
===================================================================
--- branches/version-2_4-dev/data/class/helper/SC_Helper_Mail.php	(revision 18159)
+++ branches/version-2_4-dev/data/class/helper/SC_Helper_Mail.php	(revision 18574)
@@ -173,5 +173,4 @@
         // メール送信処理
         $objSendMail = new SC_SendMail_Ex();
-        $to = mb_encode_mimeheader($to);
         $bcc = $arrInfo['email01'];
         $from = $arrInfo['email03'];