* Jeff P. via mailop: > Can cloudflare (or others) deliver messages correctly to this IPv6 MX?
The longish answer is a resounding "maybe". An IPv6-only MX can be reached only by those third-party servers which support outbound IPv6 connections on their end. Even in 2024, that is by no means every server, not even for large organisations who could be expected to support IPv6. I have done contract work for nominally big players in the email scene who don't support IPv6 at all on their end, neither for inbound nor outbound network traffic. Short version: An IPv6-only MX may work for certain limited usecases, but will most likely not work in all scenarios. It comes down to external factors you cannot control. Personally, I would not attempt to run a production MX without having public-facing addresses for both IPv4 and IPv6. -Ralph _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
