Second time on hostname

[brownh@hartford-hwp.com (Haines Brown)]

I'm having some difficulties (From: line missing in header of outgoing
newsgroup mesaages) and worry their cause might be due to what I put
into /etc/hostname when I installed.  

I had done some reading, got inconsistent answers, and ended by
using as hostname my FQDN, teufel.hartford-hwp.com when I
installed. Since then I've seen suggestions to use only the local host
name (teufel). Is "machine name" synonymous with "local host" name?

A simple question for which I desperately need an answer: Should I
have used only the local hostname?

Secondary questions: does my use of FQND spell trouble? If so, some
sources say never try to change your hostname, but do a reinstall
instead; others say, grep the /etc directory and change the name
whereever it appears. Which is right? Should /etc/mailname be
brownh#hartford-hwp.com? 

Here, incidentally, are the returns from the hostname command:

  $ hostname 
  teufel.hartford-hwp.com

  $ hostname -a
  localhost

  $ hostname -d
  [nothing is returned]

  $ hostname -f
  localhost

  $ hostname -s
  localhost

None of these seem right. 

-- 
 
       Haines Brown
       KB1GRM