We are migrating from Exchange 2007 to Exchange 2010. From time to time when a user on server A (Exchange 2007) sends a message to server B (Exchange 2010) the messages become stuck in the Hub Version 14 queue with a 4184.108.40.206 DNS query failed. After some period of time the queue will clear and the messages will be delivered.
I have verifed the DNS (since this in all internal) and this is all one site.
Any help would be appreciated.