Disable IPv6 on Postfix

[mrmarkuz (Markus Neuberger)]

With a custom template:

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