> On Dec 9, 2017, at 2:37 PM, Robert Wolfe <robert.wo...@robertwolfe.org> wrote:
>
> The issue is is we are having an issue with Postfix 2.1 (as shipped with REL
> 7.4) being apparently IPv6 compatible. Should we build this from source and
> use an updated release? And if so, how new of a release should we use for
> IPv6 compliance?
* RHEL 7 was released on 10-Jun-2014.
* Postfix 2.1.0 was released a decade earlier on 22-Apr-2004
By the time RHEL 7 appeared, the two most releases of Postfix
were:
2.11.0 -- released 15/Jan/2014
2.10.0 -- released 11/Feb/2013
So it is extremely unlikely that RHEL 7.4 ships with Postfix 2.1.
Support for IPv6 has been in Postfix for a long time prior to
RHEL 7, you should not need to build from source unless you need
some substantially more recent feature. Which is not to say that
you shouldn't run an up-to-date Postfix, but you don't have to do
that just to get IPv6. The current stable release is Postfix 3.2.
--
Viktor.
