I have a cisco ASA 5515X with two WAN connections and one LAN connection.
As far as I understand, I hace the firewall configured to allow SMTP traffic through WAN2 interface, but not through WAN1.
However, I'm having trouble sending email because the public IP is not matching the inverse DNS record. This record points to the public address of WAN2, but the email is labeled with the IP address of WAN1. How can this happen?
How do I force the outgoing emails to go through WAN2?
By the way, you will notice in the config file that WAN interfaces have private IP's. This is because there is an ADSL router between this interface and the public network.