We are running GW 8.0.2 not hot patches. System is running on a windows 2008r2 2 node cluster. When we failover the gwia from node 1 to node 2 we can no longer send email to the internet. We receive just fine, also imap and pop connections are working. We have checked firewall settings and they are the same for both nodes. We get 450 hosts unknown errors for all email going out. We think this is a dns issue, but can't find where the problem may be. We have checked the registry dns nameserver entries on both nodes and they match.