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Step 1
Double-click on the email for which you want to find the source on the Outlook Express window.
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Step 2
Click on the "File" menu and then click on "Properties."
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Step 3
Click on the "Details" tab on the dialog box that opens and then click on "Message Source." You will be shown all the details of the email, including the IP address from which it was sent.
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Step 1
Log in to your Gmail/Yahoo Mail account.
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Step 2
Click to open the email for which you want to find the source.
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Step 3
Click on the downward-pointing arrow next to the "Reply" button. Then for Gmail, click on "Show original." For Yahoo Mail, click on the downward-pointing arrow next to the "Action" button and then click on "Full Header." You will be shown the details of the email.














