email message id

[eric]

hi, i sent an email to myself and was slightly surprised to see the name
of my computer listed.  (playPen1).  

Message-Id: <1065558318.18652.1.camel at playPen1>

1.  what do the numbers and "camel" mean?
2.  where is there a good explanation of what information is passed
along with an email?  thanks for any hints.  eric.
-- 
Check out http://home.comcast.net/~235u
"Loki_the_Doppelganger"

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