On 06/10/2021 02:15, Brandon Long via mailop wrote: > Generally speaking, outside of the obvious differences, most of our spam > rules are agnostic to IPv4/IPv6.
The frustrating problem with Google's treatment of IPv6 is that the "must have reverse DNS" requirement means it will return a 5xx permanent error for a temporary DNS resolution failure, and reverse DNS typically involves multiple nameserver delegations with no glue so it's never 100% reliable. -- Simon Arlott _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
