Find IP of mail sender in Yahoo!
1. Log into your Yahoo! mail.
2. Click on Inbox
3.Open the mail.
4. If you do not see the headers above the mail message, your headers are not displayed . To display the headers,
* Click on Options on the top-right corner
* In the Mail Options page, click on General Preferences
* Scroll down to Messages where you have the Headers option
* Make sure that Show all headers on incoming messages is selected
* Click on Save button
* Go back to the inbox and open that mail.
5.You should see similar headers like this:
* Yahoo! headers : Supershock.
6. Look for Received: from followed by the IP address between square brackets [ ].For example, [204.156.240.208]
7.That´s the IP address of the sender of the mail
