Dev Tools · 1h ago
IPv6 email adoption is a mirage: 55% MX support, but only Google and Microsoft matter
A scan of 50,000 domains found 55.2% have IPv6-capable MX records, but removing Google and Microsoft drops that to 12.9%. Enterprise gateways like Proofpoint and Mimecast have near-zero IPv6 support. The result: IPv6-only sending reaches Gmail and Outlook but fails elsewhere, making dual-stack essential.
Meridian48 take
The headline numbers flatter reality: IPv6 email is essentially a two-company story, and senders ignoring IPv4 do so at their peril.
Read the full reporting
The IPv6 email mirage: 55.2% of MX "support" it, but two companies carry the entire story →
DEV Community
ipv6email-deliverability