On Sun, Mar 24, 2024 at 04:32:15PM +0100, Jack Raats via Postfix-users wrote:
> Can any help me. I want to recieve email via ipv4 and ipv6. I want to send
> email via ipv6 only.
> I tried using smtp_address_preference = ipv6, but that didn't work.
I have a machine where IPv6 connectivity is second-class (Verizon Fios
does not offer IPv6, so GRE tunnel via Hurricane Electric), and where
historically there was more impedance (stricter inbound policies on
remote servers) for IPv6 SMTP. So I chose to deliver only via IPv4:
$ postconf -Mf smtp/unix
smtp unix - - n - 150 smtp
-o inet_protocols=ipv4
And for a few v6 only domains I have:
$ postconf -Mf ipv6/unix
ipv6 unix - - n - 150 smtp
-o inet_protocols=ipv6
--
Viktor.
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