My exchange server is Exchange 2010 SP1 and I have spam filtering from MacAfee
before it hits my ord. XO Communications is our ISP.
I can Access OWA, I can send an email to the outside world and can send and receive
from inside the org, but cannot receive emails from outside the organization.
I was able to verify that the MacAfee spam filter can communicate with my exchange server.
What do i need to check?