there is no local-host-names file on my server atleast not with that file name. i did a search on google and found this
http://www.faqs.org/docs/securing/chap22sec180.html
so i gather from what i've read there i create the file under /etc/mail and add 'host-names' ... ok when they say host names they mean sites right and not server hostname. so i would put the problem site (lets call it mysitename.com)
mysitename.com
www.mysitename.com
mail.mysitename.com
with this change i should be able to receive email from servers that do a host lookup correct?