Sysadmin Error when opening CMM menu - postfix ipv6

Getting this error when trying to open the CMM menu and I can't restart postfix:

Code (Text):

fatal: parameter inet_interfaces: no local interface found for ::1

/etc/postfix/main.cf

Code (Text):

inet_interfaces = localhost
inet_protocol = ipv4

Changing localhost to 127.0.0.1 lets postfix restart but it just brings another error:

Code (Text):

postconf: warning: /etc/postfix/main.cf: unused parameter: inet_protocol=ipv4

IPv6 has been disabled on the server.

What's the proper way of fixing this up?

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Well hot damn. Fixing that typo solved everything xD Thanks!

 

@eva2000 Updating centmin code reverts the changes. How would I keep the changes? Because if I don't re-add the changes, I get the error once again when launching the centmin menu.

Btw is there anything wrong with using 127.0.0.1 instead of localhost for inet_interfaces?