From : Blog Entry>>Scott’s Blog Entry
I’m looking for a solution to help manage which systems can relay emails off of Exchange.   Currently for these systems to send email, i have to add their IP to the receive connector of every Exchange server, and remove them when that system is no longer in use; very cumbersome. By inserting an email appliance between these systems and the Exchange servers, i not only can scan each email before they get to Exchange, but the receive connectors will be much more manageable as we only have to add [More]