postfix with dynamic DNS

[pat bey]

After installing postfix + courier-imap I can send
messages but can't recieve them.  Using dyndns.org my
the problem I think lies whenever I check root's
system.  There a fatal warning message to root about
tweax-def.net unable to resolve host name error. 
Which was a hostname I never registered, but use
during installation of FBSD 4.6 then cvsp 4.8. I
change it to hijra.homeunix.com which is on all out
going mail.  #hostname shows hijra.homeunix.com but
rebooting when the kernel loads I notice it mentions
the tweax-def.net as hostname.  Checked named.conf,
/usr/local/etc/postfix/main.cf, rc.conf. and there is
no mention of this anywhere.  Is there anywhere else I
might have overlooked.  Thanks for your time and
consideration. 

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