Richard.Prosser@Powerware.com quotes and then writes:
>> would be interpretted as a new thread.  If this is not the case, what
>> field is keyed on to determine whether something is a thread or not?
>
>It is the In-Reply-To field. For this message the field is:
>In-Reply-To: <427FF716.1020907@fredonia.edu>
>
>The value of this field is supposed to be a globally unique id generated by
>your mail reader. If a mail reader groups messages only by subject then
>there is no way to tell who responded to whom (and thus can't display the
>messages in a threaded view), the In-Reply-To field gets around this
>problem.

	This is very interesting.  I also assumed it was the subject
that determined the thread.  I have thrown away that line for years
when replying to messages because I thought it was of very little
value except maybe for trouble-shooting like many other headers are
useful for.  I guess I'll put it back from now on.

Martin McCormick WB5AGZ  Stillwater, OK 
OSU Information Technology Division Network Operations Group
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