So i'm trying to send some documents to a friend of mine in word format, but i keep getting a message from *** Email address is removed for privacy ***, saying 

This is an automatically generated Delivery Status Notification.

Delivery to the following recipients failed.

How do i fix this???? Really frustrating when trying to send important documents  

This is the  message source:

x-store-info:D6taffyBScEUZsL+ZXbbDoZx0yi5SZysVDCEO1cb97YAgfcKYgytYV+ZHI0NBlCXZfug02cEQ+XK93fB/Fu/KXuYu0MZbO8Mc1Iw7aGPZGE2sHoNA8XTVPtdrjmlxzzU0jQdLHggWEA=
Authentication-Results: hotmail.com; spf=none (sender IP is 65.54.190.25) smtp.helo=bay0-omc1-s14.bay0.hotmail.com; dkim=none header.d=mail.hotmail.com; x-hmca=none header.id=*** Email address is removed for privacy ***
X-SID-PRA: *** Email address is removed for privacy ***
X-AUTH-Result: NONE
X-SID-Result: NONE
X-Message-Delivery: Vj0xLjE7RD0wO0dEPTA7U0NMPTk7bD0x
X-Message-Info: AuEzbeVr9u5fkDpn2vR5iCu5wb6HBeY4iruBjnutBzpStnUabbM/X3OHG1tkHI7a3kMiU15mwZkdItk0fkPUd26iJME4hbgAI/g6pso0Zyh7O0XVOq5g8hCf8Efy9J5lKkdwprP9EhP7RM0PyiUzXIPU4Cw0bszt
Received: from bay0-omc1-s14.bay0.hotmail.com ([65.54.190.25]) by SNT0-MC3-F36.Snt0.hotmail.com with Microsoft SMTPSVC(6.0.3790.4900);
	 Sun, 29 Sep 2013 05:17:55 -0700
From: *** Email address is removed for privacy ***
To: *** Email address is removed for privacy ***
Date: Sun, 29 Sep 2013 05:17:54 -0700
MIME-Version: 1.0
Content-Type: multipart/report; report-type=delivery-status;
	boundary="9B095B5ADSN=_01CEB8338CA55954000D3C92bay0?omc1?s14.ba"
X-DSNContext: 7ce717b1 - 1196 - 00000002 - 00000000
Message-ID: <*** Email address is removed for privacy ***>
Subject: Delivery Status Notification (Failure)
Return-Path: <>
X-OriginalArrivalTime: 29 Sep 2013 12:17:55.0288 (UTC) FILETIME=[ED3F0D80:01CEBD0D]
This is a MIME-formatted message.
Portions of this message may be unreadable without a MIME-capable mail program.
--9B095B5ADSN=_01CEB8338CA55954000D3C92bay0?omc1?s14.ba
Content-Type: text/plain; charset=unicode-1-1-utf-7
This is an automatically generated Delivery Status Notification.
Delivery to the following recipients failed.
       *** Email address is removed for privacy ***
--9B095B5ADSN=_01CEB8338CA55954000D3C92bay0?omc1?s14.ba
Content-Type: message/delivery-status
Reporting-MTA: dns;bay0-omc1-s14.bay0.hotmail.com
Received-From-MTA: dns;BAY168-W90
Arrival-Date: Sun, 29 Sep 2013 05:17:53 -0700
Final-Recipient: rfc822;*** Email address is removed for privacy ***
Action: failed
Status: 5.5.0
Diagnostic-Code: smtp;550 Requested action not taken: mailbox unavailable
--9B095B5ADSN=_01CEB8338CA55954000D3C92bay0?omc1?s14.ba
Content-Type: text/rfc822-headers
From:  Sean Nguyen <*** Email address is removed for privacy ***>
To:  "*** Email address is removed for privacy ***" <*** Email address is removed for privacy ***>
Message-ID:  <*** Email address is removed for privacy ***>
Subject:  Notes
--9B095B5ADSN=_01CEB8338CA55954000D3C92bay0?omc1?s14.ba--