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Microsoft Outlook 2003: Determining a recipient's IP address by using receipts
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How to determine a recipient’s IP address by using receipts:
NOTE: Applies to Microsoft Office Outlook 2003 and Microsoft Outlook 2002
To track what computer was used to open an e-mail message, use Outlook receipts. For this solution to work, the sender must first request a read receipt.
Receipts arrive in the Inbox as messages. A receipt indicates that someone opened the message. Additional information is available inside the Internet headers of the receipt. Message headers provide a list of technical details about a message, such as who it came from, the software used to compose it, and the e-mail servers it passed through on the way to the recipient.
To view the Internet header, do the following
1. Open the read receipt message.
2. On the View menu, click Options.
The headers appear in the Internet headers box.
Inside the headers are several lines that begin with Received: from. Starting from the top, the last of these lines indicates the computer from which the e-mail message was sent, i.e., the computer on which the original message was opened.
An example of the entry might be similar to the following:
Received: from MikeTTigersPC ([192.168.0.27]) by smtpmail.litware.com with Microsoft SMTPSVC(6.0.3790.0);
Wed, 15 Dec 2006 13:38:49 -0800
This entry indicates that a computer with the name MikeTTigersPC with an assigned IP address of 192.168.0.27 was the computer on which the e-mail message was opened, and that it was the computer on which the read receipt was created at 1:38 P.M. (local time of the computer), on Wednesday, December 15, 2006.
NOTE: Because many computers are behind firewalls or on private IP networks, the address shown might not be a public IP address that you can look up using Internet search utilities. For example, IP addresses in the range of 192.168.0.0 to 192.168.255.255 are reserved for private networks. The same is true for IP addresses between 10.0.0.0 and 10.255.255.255, and 172.16.0.0 to 172.31.255.255. If you need the public IP address — most likely the organization's e-mail server or Internet Service Provider (ISP) e-mail server address, examine the Received: from lines higher up in the header.
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9/25/2009 11:46:59 AM
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