I have configured my rDNS for IPV4 on my VPS at vultr.
When I do an rDNS test using mxtoolbox it effectively shows me my domain instead of 220.127.116.11.vultr.com
The problem I have is that I cannot pass the SpammAssassin test using the email verification service at https://www.mail-tester.com/
The strange thing is that it only happens to me with section SpammAssassin because in another part of the test it tells me that I am fully authenticated and it indicates that my rDNS points to my domain.
What did I miss? Will I also have to configure IPV6 on my VPS for pass this test? Or is it because I haven't waited long enough for the changes to be reflected?
Thank you very much.