We are researching configuration options for OWA 2007.
We currently have a Sonicwall Pro 2040 configured with restricted port 25 access for our email.
What would be the preferred way to configure OWA 2007?
Do we need to create a DMZ? Should we be implementing Forefront TMG? What would be the best configuration for TMG if we did deploy?
Sorry to be vague, but we are open to any advice.