Postfix - Name service error for blahblah.net

Hi, Not sure whats going on now. I've restarted the machine and all services, yet I'm getting werid errors with postfix. I'm receiving the following error in /var/log/mail, of course I've replaced the real domain with blahblah.net Oct 14 20:05:50 dev postfix/smtp[3144]: 7DDBF34910: to=, relay=none, delay=2417, status=deferred (Name service error for blahblah.net: Host not found, try again) However if I do dig <hostname> it returns an answer. Any ideas. Regards Adam