These appear in the logs, it looks like something that needs attention on
opensuse.   
I did a search and saw this list where they are working to correct it   
http://postfix.1071664.n5.nabble.com/Warning-group-or-other-writeable-td87817.html

Postfix/postfix-script[1140]: warning: group or other writable: /etc/postfix/./
ssl/cacerts
postfix/postfix-script[1142]: warning: group or other writable: /usr/lib/
postfix/./libpostfix-tls.so
postfix/postfix-script[1143]: warning: group or other writable: /usr/lib/
postfix/./libpostfix-util.so
postfix/postfix-script[1144]: warning: group or other writable: /usr/lib/
postfix/./libpostfix-dns.so
postfix/postfix-script[1146]: warning: group or other writable: /usr/lib/
postfix/./libpostfix-global.so
postfix/postfix-script[1147]: warning: group or other writable: /usr/lib/
postfix/./libpostfix-master.so

My config.
opensuse:tumbleweed:20170823
Qt: 5.9.1
KDE Frameworks: 5.36.0
KDE Plasma: 5.10.4
kwin 5.10.4
kmail2 5.5.3
akonadiserver 5.5.3
Kernel:  4.12.8-1-default
Nouveau:  1.0.15_1.2