Total | % of MX records
All MX IPv4 only 334,696 52.03
All MX IPv6 only 74 0.01
All MX dual-stack 288,849 44.91
At least one MX dual-stack 301,273 46.84
At least one MX IPv4-only 347,119 53.96
At least one MX IPv6-only 271 0.04
Only IPv4-only and IPv6-only MXs 89 0.01
Dual-stack with at least one IPv4-only MX 12,334 1.92
Dual-stack with at least one IPv6-only MX 108 0.01
Dual-stack + IPv4-only + IPv6-only MX 18 0.002
Dual-stack + only IPv4-only MX 12,316 1.91
Dual-stack + only IPv6-only MX 90 0.01
At least one MX IPv6 enabled (dual-stack or IPv6-only) 301,436 46.86
And finally, #SMTP. Looking at the Top 1M Domains' MX records, over 52% are IPv4-only; 45% fully dual-stack, and another 2% or so having at least one MX record with an IPv6 address.
But there are also large MX service providers who have IPv6 addresses on some […]
[Original post on mstdn.social]