False alarms about incorrect reverse DNS

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Might find some help from one of these previous reports:

System Status Check claims reverse DNS is not correct

According to the System Status Check page in the admin area, my reverse DNS is not set. It gives me the following error: Your box's reverse DNS is currently [Not Set], but it should be mydomain.com. Your ISP or cloud provider will have instructions on setting up reverse DNS for your box at 111.111.111.11. Note that I’ve changed the domain and IP address in the error message. When I do a manual check using either the host or dig command on my box, the reverse DNS is showing up as being correc…

Reverse DNS strange message

Hi, my rDNS was set 48 hours ago, but the System Status whos the following. Does anybodey know what this means? Your box’s reverse DNS is currently box.green.com (IPv4) and [Not Set] (IPv6), but it should be box.green.com. Your ISP or cloud provider will have instructions on setting up reverse DNS for your box.

Seems to be a common occurence for Digital Ocean installs.