Apparently this is something I completely overlooked. We keep getting message failures due to lack of PTR records and valid rDNS entries but I have no idea how to set this up. We have a /29 block of address from our ISP and use one public address for our mail server. We also have GoDaddy as a registrar and can get the A and MX records configured correctly but I have no idea how to add PTR records. GoDaddy does not have a DNS option to create PTR records but they do have SPF records that I can set but no matter what I configure Reverse DNS fails. I have complete control over the Godaddy DNS and the DNS server running on the Mail server but regardless of what I set it doesnt seem to work correctly. Any help would be appreciated. Is this something that I can do with GoDaddy or does my ISP have to help? I cant be the only one with this issue can I ?