[CentOS] dumb sendmail question -- how to get outbound messages to use "example.com" instead of hostname?

     Since you are using NAT, the important IP address and host name
associated with it is the one the outside world sees.  Does that IP address
have a host name the world sees and does that name then resolve to the same IP
address?

-- 

  Brent L. Bates (UNIX Sys. Admin.)
  M.S. 912				Phone:(757) 865-1400, x204
  NASA Langley Research Center	  	  FAX:(757) 865-8177
  Hampton, Virginia  23681-0001
  Email: B.L.BATES at larc.nasa.gov	http://www.vigyan.com/~blbates/