I currently am NAT'ing all RFC-1918 addresses out the firewall to the Internet. However, I want outgoing mail to appear to originate from a different IP.
So, 10.0.0.1 NATs out as 22.214.171.124
10.0.0.2 (a mail server) should browse Internet appearing to be 126.96.36.199
10.0.0.2 should connect to remote tcp/25 appearing to be from 188.8.131.52
Any way to accomplish this?