I have 4 exchange servers
2 MBX and 2 CAS.
I am forwarding the smtp request from firewall to cas02 and using cas01 as stand by.
Email are working fine except some time when we look at the email queue emails get queued n smtp database. And it take very long time to route to user mailbox.
My mailbox in the DAG.
When I checked in the Active Directory DNS MX record pointing to cas01 and cas02