[horde] microsoft outlook 2010 test message shows unknown date

[Rajesh M]

hi

we are using the latest version of horde

due to some reason test message sent by microsoft outlook 2010 test message shows unknown date in horde

whereas the same email can be viewed correctly using squirrelmail


given below headers of the email

Return-Path: <test1 at indiannic.com>
Delivered-To: test1 at indiannic.com
Received: (qmail 23752 invoked by uid 89); 12 Sep 2015 13:48:59 -0000
Received: by simscan 1.4.0 ppid: 23746, pid: 23748, t: 0.0889s
         scanners: attach: 1.4.0 clamav: 0.98.6/m:
Received: from unknown (HELO inicdevPC) (test1 at indiannic.com@120.62.160.123)
  by ns1.bizmailservers.net with ESMTPA; 12 Sep 2015 13:48:59 -0000
From: Microsoft Outlook <test1 at indiannic.com>
To: =?utf-8?B?dGVzdDFAaW5kaWFubmljLmNvbQ==?= <test1 at indiannic.com>
Subject: =?utf-8?B?TWljcm9zb2Z0IE91dGxvb2sgVGVzdCBNZXNzYWdl?=
MIME-Version: 1.0
Content-Type: text/html;
    charset="utf-8"
Content-Transfer-Encoding: 8bit

This is an e-mail message sent automatically by Microsoft Outlook while testing the settings for your account.

help required in fixing this please


thanks a lot,

rajesh