How to disable ipv6 system-wide?

[mrmarkuz (Markus Neuberger)]

Maybe it’s enough to disable ipv6 for postfix?

In the following thread you’ll also find disabling ipv6 completely. In this case you need an unbound fix.

Postfix tries to connect to IPV6 servers and gets "Network unreachable" error

A custom template is needed. The main.cf config file works like last occurance counts so it’s possible to just add a custom fragment at the end instead of overwriting: mkdir -p /etc/e-smith/templates-custom/etc/postfix/main.cf echo 'inet_protocols = ipv4' > /etc/e-smith/templates-custom/etc/postfix/main.cf/90ipv4 signal-event nethserver-mail-server-update