Src="https://www.hostscheap.com/hostscheap/logo/hostscheap_round.png" /> Rdns stands for reverse Domain identify system. Establishing Rdns is normally performed inside of VPS issuing account. You can even do that through the command line by logging in for your putty server and running the following command: Virtualization calls for comprehensive memory management and privileged entry ... https://push2bookmark.com/story17089397/iredmail-installation-for-dummies