Alright... The PTR are correctly added when I just use a domain. But as soon as the IP has a PTR with a subdomain it gets the wrong domain appended. For example 75 PTR correctdomain. 83 PTR correctdomain. 15 PTR ns.wrongdomain. 71 PTR ns.wrongdomain. The entires are added and removed through dns manager. But they always gets appended wrongdomain which is another customer domain on the system. any idea why this might happen?