Cannot determine host's domain name, so skipping default key generation.

Installing DKIM & SPF
Postfix and opendkim already installed!
Stopping Clam AntiVirus Daemon: [  OK  ]
Starting Clam AntiVirus Daemon: [  OK  ]
Stopping spamd: [  OK  ]
Starting spamd: [  OK  ]
Shutting down Mail Virus Scanner (amavisd): [FAILED]
Starting Mail Virus Scanner (amavisd): [  OK  ]
Stopping Dovecot Imap: [FAILED]
Starting Dovecot Imap: [FAILED]
Shutting down postfix: [  OK  ]
Starting postfix: [  OK  ]
Stopping OpenDKIM Milter: [  OK  ]
Generating default DKIM keys: [WARNING]
Cannot determine host's domain name, so skipping default key generation.
Starting OpenDKIM Milter: [  OK  ]

Cant find what I m doing wrong 

fixed problem with my hostname......

Reject Unknown Hostname:
(WARNING: Reject unless the hostname has valid DNS record.)

why have you enabled above  if you are not certain what that does ?

I had problem with my host name fixed before.
You didn't see I edited my post.

try confirming your hostname in the CWP.admin and then again rebuild the mail server

Admin you are drunk today. In his initial post only he mentioned problem was solved and he knew it was his hostname

just for others reading the same posts...so that they don't open multiple topics
but yes I'm probably little drunk from coffee