Bill Cole wrote: > michaelof wrote: > > 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? > > No.
Agreed. No. You will not be able to exchange email with many sites. > > I'm only not sure if there might be "IPv4-only" email providers out > > there, whose emails might not be routed to my "IPv6-only" postfix. > > There are many. > > Some do not yet have IPv6 service yet. I have a site using CenturyLink since that is the only option available. And CenturyLink there does not support IPv6! Which I find amazing but still true. I am anxiously waiting for a city fiber project which is every so slowly progressing so that a connection to the new fiber ring might be made. Until that time it has IPv4 only. > Some have IPv6 connectivity and address space but no motivation to make > their mail systems use IPv6. There are reasons to avoid sending over IPv6 > and very few if any significant reasons to want to send or receive over > IPv6. If one has a working IPv4-only mail system, adding IPv6 is pure work > for no discernible benefit. How are working and available IPv6 DNSBLs progressing? That's a critical component which I would love to hear is no longer a missing component. Bob
