Post your questions about tracing the source IP address of an email here.
The senders ip is not included here. This email was sent through whats called php mail. Typically this is mail sent using LF (line feed) and most websites that use this do include the senders ip address. Although the php scripting can be modified to remove that function. But the only people removing that part of the script are those trying to hide their location. In this case, it seems to have worked.