My mail server sits on an internal lan with a address scheme of 192.168.10.0/24. I have a NAT rule that associates one of my public IP's to the mail servers IP. As an example the NAT rule looks like this 62.62.62.62 -> 192.168.10.62. I then have rules on the WAN interface to open up the FW for the ports i need for my mail server (25, 465, 143, 993, 443) these rules all have a destination of 192.168.10.62.
The static IP's for the mail server comes from the WAN connection which is a static IP connection. DNS is setup to point the domain name for my mail server to the public address of 62.62.62.62
My second WAN connection (WAN2) is a DHCP connection which is load balanced with the first WAN connection. The load balance setup works and I'm able to search the internet fine and speed test result in the results i expect. The only issue I have is i cannot connect to my mail server via the internet. On the internal network it is fine.
Please let me know if you need additional information.
Thanks,
Judd