On 08/05/2020 17:38, michae...@rocketmail.com wrote: > Hi all, > > > I've a generic question to all more experienced than me postfix users here: > Is it nowadays (reasonable) possible to run postfix with IPv6 only? E.g > "mail.example.com" and "smtp.example.com" with only ipv6 AAAA records in the > DNS, no A / ipv4 anymore? > I am running a domestic server, and 10 percent of inbound emails, and maybe 30 percent of outbound emails still use IPv4.
There was a worry some years ago that IPv6 was not adequately protected by DNS blacklists, and was thus vulnerable to spam attacks. I have not found this myself, but am not representative of the world-at-large. But there seem to be a lot of MX hosts out there which do not accept incoming IPv6. For my server, I have set up a primary MX which is IPv6 only, and a secondary, which is dual protocol. Perhaps you could do something similar with your situation. Hope this helps Allen C
