VestaCP IPv6 E-mail PTR Error

Our system has detected that this message does
550-5.7.1 not meet IPv6 sending guidelines regarding PTR records and
550-5.7.1 authentication. Please review
550-5.7.1 https://support.google.com/mail/?p=ipv6_authentication_error for more
550 5.7.1 information.

VestaCP -> DNS -> List Records

Change: “v=spf1 a mx ip4:YOUR_IP ?all”

To: “v=spf1 a mx ip4:YOUR_IP_v4 ip6:YOUR_IP_v6 ?all”

Note: Reverse IPv6 DNS must be set in the first place.

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