I received an e-mail from 192.244.203.83?

I received an e-mail in Outlook Inbox from USPS Service <status_item@usps.com> with the attachment Label_Parcel_USPS_13-114.zip

However, the ip address in the e-mail message header is 192.244.203.83

How can I find out "who is" or "what is" using 192.244.203.83 on our network?

Thanks for your help.
LessonsLearnedAsked:
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LessonsLearnedAuthor Commented:
The header information is:

Received: from outlet-web.jp (192.244.203.83) by SD1.sd.local (192.168.1.253)
 with Microsoft SMTP Server id 14.1.218.12; Mon, 9 Apr 2012 12:39:03 -0700
Received: by outlet-web.jp (Postfix, from userid 2)      id DE98084436D; Tue, 10
 Apr 2012 04:38:17 +0900 (JST)
To: <jim@mmpph.com>
Subject: Postal notification
From: USPS Service <status_item@usps.com>
X-Mailer: mPOPWeb-Mail2.19
Reply-To: USPS Service <status_item@usps.com>
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="----------13340002974F833AA9C4324"
Message-ID: <20120409193817.DE98084436D@outlet-web.jp>
Date: Tue, 10 Apr 2012 04:38:17 +0900
Return-Path: daemon@outlet-web.jp
X-MS-Exchange-Organization-AuthSource: SD1.sd.local
X-MS-Exchange-Organization-AuthAs: Anonymous
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LessonsLearnedAuthor Commented:
Network Solutions Whois states 192.244.203.83 equates to outlet-web.jp

Domain Information:
[Domain Name]                   OUTLET-WEB.JP

[Registrant]                    STB,Inc.

[Name Server]                   01.dnsv.jp
[Name Server]                   02.dnsv.jp
[Signing Key]                  

[Created on]                    2007/06/04
[Expires on]                    2012/06/30
[Status]                        Active
[Last Updated]                  2011/07/01 01:05:05 (JST)

Contact Information:
[Name]                          STB,Inc.
[Email]                         kobayashi@stb-libman.jp
[Web Page]                      
[Postal code]                   441-8113
[Postal Address]                Toyohashi-shi
                                333 Nishimiyuki-cho Aza Hamaike
                                Sience Core 109
[Phone]                         0532-38-6595
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tobywestonConnect With a Mentor Commented:
This is not an internal IP, it will be coming externally from one of the many spam bots around the world.

Doing an IP lookup will show you roughly where.
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Dave BaldwinConnect With a Mentor Fixer of ProblemsCommented:
The first "Received:" line tells you who it came from.  It is just spam.  They faked all the other email addresses.
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LessonsLearnedAuthor Commented:
Thank you very much.  When I pinged 192.244.203.83, I got 4 replies.  I thought that because the IP address began with 192, that it was a computer or device located in my office, but "tobyweston" said it was not an internal IP.
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pony10usCommented:
tobyweston is correct.  Here are the private IP address ranges:

IANA-reserved private IPv4 network ranges Start End No. of addresses
24-bit block (/8 prefix, 1 × A) 10.0.0.0 10.255.255.255 16777216
20-bit block (/12 prefix, 16 × B) 172.16.0.0 172.31.255.255 1048576
16-bit block (/16 prefix, 256 × C) 192.168.0.0 192.168.255.255 65536
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