E-mail Path. How to check?

Hi All! I recieved an e-mail with address from my domain. But a haven’t registered such user. I haven’t a user in Address book with that name. So I find who send me this joke (he told me hours later), but I want to know is there a way to find e-mail path. May be a sender IP address or something to find from where an e-mail is coming.

Thanks in advance!

Subject: e-mail Path. How to check?

Stephan,

For routing via NRPC, check the “RouteServers” field. For routing via SMTP, check the “Received” fields.

-Trey