I am looking to implement a simple SMTP gateway solution for a few applications to relay emails and hence am not looking at a full fledged Exchange deployment. As SMTP component is no longer available in Windows Server 2012, I would like to know if the Exchange 2010 Edge role can function as a simple SMTP gateway solution without having the other roles of Exchange 2010 deployed like the CAS, Hub and Mailbox ?
My requirements from this SMTP gateway solution would be the ability to append disclaimers, relay restrictions based on IP addresses and sender email addresses, and provide both authenticated and unauthenticated relay access.
Any inputs would be highly appreciated. Thanks in advance.