I have an exchange server (internal network) where I redirect all outside smtp traffic (works fine), when I move this server to the DMZ and redirect all smtp traffic to it changing:
static (Inside,Outside) tcp interface smtp 10.100.10.6 smtp netmask 255.255.255.255
static (Inside,Outside) tcp interface smtp 10.100.20.10 smtp netmask 255.255.255.255
Traffic can't get to the DMZ, what am I missing?
Complete configuration attached