This trick is useful for handling suspicious emails. By looking on its header, we can see from which IP address the email was sent.
- Double click the email to make it open in a new window
- Click the Tags button
Using online WHOIS, we can find out more about the IP address:
If you really have nothing to do, you can submit complaint to the ISP of that naughty IP address. But very likely, the PC on that IP address is just a dummy, and is a part of a BotNet.