I have two servers setup in smart host configuration. Exchange.MyDomain.com and SMTP.MyDomain.com
SMTP is smart host for Exchange.
The out going email is perfectly fine... Immediate delivery.
Emails sent inside domaim is perfectly fine... Immediate delivery.
Incomming email seems to work but is taking hours for delivery.
The queue for email destined for Exchange,MyDomain.com on SMTP.MyDomain.com is very large...1000+ messages.
How can I rectify this issue...the current config was working fine for weeks...Let me know where to start.