Experts, Here is the situation. I have two ISPs providing a primary and a backup internet service. I use a mail scanning service which then connects to O365 for email. I have a sperate DNS host (Cloudfiair) to host our DNS record along with our website. I have my servers in my LAN setup to send SMTP notifications to our mailscanning service but I've been getting Blacklisted by RATS Dyna for RTP (Reverse Lookup) failure. I have DNS set up with Cloudflair to resolve a name lookup correctly, but they don't offer RTP. I spoke to my ISP and they can provide RTP, but would need to migrate my domain to be hosted by them which I don't plan to do. Any other recommendations?