Hi all, my edge has 2 nic card one for sending to external (mean this interface will also seek external dns server) and another one for internal(mean the other interface will seek internal dns server). Current setting has set in a way where any incoming email from external parties will have to go through a smart host for scanning before it reaches the mailbox server (the smart host is same vlan as the mailbox server). But if i ever remove the smart host on my setting and to make edge talk to my cas/mailbox server directly i always get the error of dns query failed with error errorretry and from my finding it seem to be seeking external dns even it meant for my mailbox server.
Have tested telnet from edge to dns and mailbox work perfectly fine.