Keep in mind, this was 1990! Not
  many people routinely had email at the
  time... Heck, even within the computer
  industry, where email had been around for
  years, it was still more novelty than not.

  But, Cliff Stoll had put his email addresses
  in the front of his book... It was the first
  time I've ever seen such a thing and I was
  impressed! At the end of his foreword was:

    --Cliff Stoll
       Electronic mail addresses:
       Internet:            cliff@cfa.harvard.edu
       CompuServe:     71660,3013
       Genie:              Cliff-Stoll

  (The CompuServe and Genie addresses
  should indeed be a telling sign of just how
  early those days were!)

  So anyway, as a fellow computer guy
  I decided to send him a quick email, just to
  tell him I'd enjoyed his book... He did in fact
  write back a few weeks later, and I'll always
  consider it my first and only "famous" email!

 From ncrcae!ncrlnk!relay.cs.net!cfa253.harvard.edu!cliff Thu Sep 27 16:34
 EDT 1990
 Received: from relay.cs.net by ncrlnk.Dayton.NCR.COM
           ; Thu, 27 Sep 90 15:52:59 -0400
 Received: from [128.103.40.202] by RELAY.CS.NET id aa22411; 27 Sep 90
 Received: from cfa253.harvard.edu by oxmyx.harvard.edu (4.1/SMI-4.0) id
 AA19353; Thu, 27 Sep 90 11:07:25 EDT
 Date: Thu, 27 Sep 90 11:07:25 EDT
 Message-Id: <9009271507.AA19353@oxmyx.harvard.edu)
 Received: by cfa253.harvard.edu; Thu, 27 Sep 90 11:01:28 EDT
 From: cliff@cfa253.harvard.edu (Cliff Stoll)
 To: paul@sauron.columbia.ncr.com
 Subject: Greetings!

 Hi Paul,

 Many thanks for your kind note -- glad that you got a charge from the
 book ... you sure brightened my morning!

 Apologies that I took a month ato answer your note - I'm still moving
 to California and letters are piled up 200 deep.