identify incoming IP email address

I'm using outlook express 6.0. How can I determine the IP address and other identifying information of an email I received? Thanks.

 

Either right-click on the email and select Properties, or open it then go to File\Properties, then click on Details in the little window that pops up. If you then click on the Message Source button, you'll get the Details along with the email text in another window, which can then be maximized.
You are looking for "Received:" just above "Message-ID ", the other Received:'s is how it got to you.
Wondering where the IP originated from? Get IPLookup.
http://www.mytoolpad.com/open/iplookup//