🚀 go-pugleaf

I recently posted a question to comp.sys.sun about setting up mail on a a
cluster of 10 suns, and the replies I got were just the trick.  Local mail
works perfectly now.

The problem that now exists has to deal with incoming mail.  It seems that
if I send a message to the mailhost sun (called suna or
suna.coe.wvu.wvnet.edu) two things happen:

 1)  If mail is addressed to, say fuhrman@suna (from another machine
     with nameserver resolver capabilities), all works fine.

 2)  If mail is addressed to, say fuhrman@suna.coe.wvu.wvnet (fully
     specifying the hostname), the mail arrives at suna, but then 
     suna thinks that the address is foreign, and forwards the mail
     on to the MAJOR RELAY MAILER in sendmail.cf (which happens to
     be itself) - et voila!  The following error message in mail from 
     MAILER-DAEMON:

     >>> HELO suna.coe.wvu.wvnet.edu
     <<< 553 suna.coe.wvu.wvnet.edu I refuse to talk to myself
     554 fuhrman@suna.coe.wvu.wvnet.edu... Service unavailable 

Ok.  So I just want to know how sendmail resolves the equivalence of the
two names suna and suna.coe.wvu.wvnet.edu.  BTW, these two names _are_ on
the same line in /etc/hosts.  Also, the mailhost is also the loghost for
the yellow pages.   

Please reply to the list or directly to manager@a.coe.wvu.wvnet.edu.  
Thanks,

-Cris