If you are a yahoo mail user, follow the following steps if you wanna track the ip address of your mail senders.
FINDING IP ADDRESS IN YAHOO! MAIL
Received from: (name)
followed by the sender’s IP address in square brackets  an ip address should look like this 135.065.456.35
Very soon, I’ll post on how you can track the ip address of mail senders in gmail and hotmail, so watch out.
You can share this info with others using any of the sharing tools below.
see you later!