From: "Geo" 

Ignoring the address for a moment, it's trivial to look at the headers of a
saved email to obtain the IP address of your mail server. How the mail
would get to your mail server is questionable (spammers cache the IP for
weeks so there would no doubt be spam) but finding the IP address would be
pretty easy.

Geo.

"Mike N."  wrote in message
news:4dvej2ht10ufoab4noj0rnt96o8b9s62cj{at}4ax.com...
> In the series "Jericho" about a town after a nuke attack, they attempt
> check their E-mail.  Since E-mail didn't work, they did the next best
> thing, they tried to reach it by IP address.  The "IP
address" they typed
> in was 827.750.304.001  !   Of course everyone knows the IP address of
> their E-mail server in case DNS goes down.

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