SIVAPRASAD

# Log into your Yahoo! mail with your username and password.
# Click on Inbox or whichever folder you have stored your mail.
# Open the mail.
# 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 the Save button
* Go back to the mails and open that mail.

# You should see similar headers like this:

* Yahoo! headers : Daniel.

# Look for Received: from followed by the IP address between square brackets [ ]. Here, it is 202.65.138.109.
# That is be the IP address of the sender!