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.
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