l...@ungleich.ch:
> Greetings everyone,
>
>
> In 2020 we think it would be a reasonable enable IPv6 it by default.
> V4 addresses are getting expensive, and new ISP-s and businesses are
> moving to V6 with great momentum. Moreover it would help us and others
> to reduce complexity in their infrastructure.
>
> The postfix IPv6 article(1) mentions a couple points against this, but
> the followings are not valid anymore in 2020:
>
> "By default, Postfix uses IPv4 only, because most systems aren't
> attached to an IPv6 network."
> According to Google, third of their users access their service via IPv6.
If 2/3 of all SMTP clients are IPv4-only, then that would be a reason
not to make this the default for SMTP.
Wietse
> "Linux kernels don't even load IPv6 protocol support by default. Any
> attempt to use it would fail immediately."
> It is enabled by default(3).
>
>
> The change:
> /etc/postfix/main.cf:
> from: inet_protocols = ipv4 (DEFAULT: enable IPv4 only)
> to: inet_protocols = all (DEFAULT: enable IPv4, and IPv6 if
> supported)
>
>
> Looking forward to hear your thoughts.
>
> Best,
> Balazs
>
>
>
> 1: http://www.postfix.org/IPV6_README.html
> 2: https://www.google.com/intl/en/ipv6/statistics.html
> 3: https://www.kernel.org/doc/Documentation/networking
>
