George Frajkor asked:

>   Once upon a time, I remember that there used to be a server to
>which one could telnet and get the real identity of someone using an
>email account.  I thought that it was rs.internic.net  but this is
>clearly not so.

First rs.internic.net changed to networksolutions.net. But what you want is
to be able to look up the IP numbers of the originating host. This will be
found in full headers. The best site for you is:

http://www.geektools.com/cgi-bin/proxy.cgi

Don.