We have currently an ASA5510 as VPN Firewall and a software base anti-spam for email and everything is working alright.
We are putting a Barracuda 200 anti-spam to replace the software base one. We want to put it inside the firewall. We would like to divert incoming email destined to Email Server Public address to the internal IP of Barracuda instead of the Email Server. Also leave the outgoing emails from the email Server to its Public address. I am using ASDM to configure the ASA and have tried both static policy nat and dynamic policy nat with all possible convination I could think of but can't get it to work.
All inputs are welcome.