I'm now using PFSense as our firewall and am looking for a way other than 1:1 Nat to send traffic from our Mail-Server through a specific public IP we have in our pool that can be quickly changed on the fly. We have 126 useable IPs so were in the /25 subnet, and am unsure of how to do it. I still want to receive mail on the same IP we have been using, just looking to send mail out a different public IP we have
The reason is, we have our Public DNS for our MX and A records for our mail server, but if an issue ever arises with say being blacklisted when we send mail outbound on that same address, I want a way to quickly change the outgoing public IP being used.
IE I still want to receive mail on the same public IP we have been using, but I'd like a way to quickly change a setting to send out mail using a different public IP in our available pool.
Is this possible?