Zoneedit, Ispconfig and Reverse DNS.
I have setup ispconfig on Ubuntu 11.04.
I use it mainly for Email for some of my customers.
The Ubuntu server is a Citrix VM running on a static ip 18.104.22.168.
I have full control over this server and it is also a static ip accessible from the net.
I use ZoneEdit to handle my DNS related issues.
Server was working fine untill some customers emails started bouncing.
I host multiple domains on this VM but have never had the need to setup any kind of DNS records on the ISPConfig server since I just forward it from ZoneEdit to the server.
The error the customers are getting is the following.
Connection Refused: IP Address <22.214.171.124> - HELO/EHLO Invalid or Non-Existent Reverse DNS
Obviously its a DNS issue and I would like to know what you suggest I do to resolve this. Do I handle this in Zoneedit or on the IspConfig server itself.