I am trying to configure my on-prem mail server in Pfsense but I can't seem to make it work. I have setup the following configurations but the server still can't send or receive mail.
- DNS records pointing to public IP
- Virtual IP (IP alias) pointing to public IP
- NAT port forward rules
- NAT outbound rules
I am not sure if I am still missing any additional configuration
Source: r/PFSENSE · by /u/jham992