Most of the messages sent from the internal network is not being routed to the destination. All the messages reads:
R=dnslookup T=remote_smtp defer (110): Connection timed out .
OR
R=dnslookup T=remote_smtp defer (-53): retry time not reached for any host
The messages are sent after a long period of time, sometimes 3 to 6 hours later. I can receive messages from outside.
Please let me know what I need to do or configure to solve the issue.
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