Hi- Single site, single domain. Migrating from 2010 single, stand-alone server to 2013, 3 dual-role VMs on Hyper-V, part of a DAG.
We've changed to a new namespace on the new installation. Most users are still on 2010. Since 2013 was introduced, some domains are not accepting email messages from users on the 2010 server.
"Last Error" messages in the Queue on 2010 refer to "Cannot find your reverse hostname" and "Reverse DNS Failure".
Doing a nslookup on the 2010 server of one of the domains comes back with the correct information.
I'm referencing a migration guide that is using the same namespace for the new installation, so I think I'm missing something.
Any help is greatly appreciated.
You should never, never doubt what nobody is sure about. -Willy Wonka