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?   ... View more