Graphs on this site are created from our domain-database which contains approximately 12 mil. domains. If there is a MX record for a domain both A and AAAA RR are checked.
IPv6 support for MX records
Ratio of IPv4 only, dualstack and IPv6 only MX records
IPv6 support for MX records by TLD
Only TLD with more then 10 000 records are displayed.