Postfix : "IPv6 support is disabled" warnings

postfix/postsuper[96483]: warning: inet_protocols: disabling IPv6 name/address support: Protocol not supported postfix/postlog[96508]: warning: inet_protocols: disabling IPv6 name/address support: Protocol not supported To disable the messsage, go to /etc/postfix/main.cf and change from: inet_protocols = all to: inet_protocols = ipv4 This will only use IPv4 and the warning message will go away.