We've recently started send email direct to the internet instead of going through a 3rd party gateway. We have 2 MX250 in redundancy with 2 load-balanced internet circuits. This equates to 4 public IP addresses. I've got to complete the Reverse DNS entries to satisfy some remote email server spam requirements. Do I need to add our email server HELO/EHLO response with all 4 of the rDNS entries? Is there a better way of handling the SD-WAN environments with rDNS?
I missed a configuration on the WAN2 side for the virtual IP. With it configured, now I only have to add 2 instead of 4 entries in the rDNS tables. Thanks for the suggestion.
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