On Wed, Aug 03, 2022 at 10:39:17PM +0200, Joachim Lindenberg wrote:
> I do have inet_protocols=ipv4 in main.cf, everything else should
> support ipv6 as mailcow in general does support ipv6, but due my NAT
> setup I decided not to support ipv6 so far, and also I don´t believe
> ipv4 will go away soon for smtp in general. Moving to proxy protocol
> would allow me to support ipv6 inbound (relevant for submission if at
> all), but for sure I will not change my internal network to ipv6.
> Nevertheless, I really don´t see any dependencies here that cannot be
> resolved. Parsing is text processing and data structures, not relying
> on kernel support or settings. DNS reverse lookups of ipv6 addresses
> can be done via ipv4. If you want to support smooth transitions,
> please do away with exceptions like this one.
Postfix presently does not support IPv6 address processing when
inet_protocols = ipv4.
This restriction could perhaps be lifted in the HAPROXY code, but this
would require some analysis...
--
Viktor.
