How to set up multiply domains on Reverse DNS field?
If i want to set up a1.com and a2.com on Reverse DNS field,
Can i input "a1.com;a2.com" on Reverse DNS field?
or How to set up multiply domains on Reverse DNS ?
Does anyone know that?
You should not set multiple PTR records for an IP and as far as I know Linode will not allow you to do so (nor should they).
You can only configure rDNS for one domain per IP address. Note that we're unable to provide additional Linode IPv4 addresses for rDNS purposes. You do have the option of configuring rDNS for IPv6.
In case it's helpful, here's our guide on configuring rDNS: Configure Your Linode for Reverse DNS (rDNS)