An error popped up during the update, how to overcome it?

Question

postfix

It seems that from Ubuntu 16.04 it seems to be completely dumped, then the whine falls endlessly when updating, now the postfix ..
In short,

Aug 20 15:46:42 mysite.com-GER postfix/postfix-script[11159]: warning: group or other writable: /usr/lib/postfix/sbin/./lmtp
Aug 20 15:47:08 mysite.com-GER postfix/postfix-script[11201]: stopping the Postfix mail system
Aug 20 15:47:08 mysite.com-GER postfix/master[1748]: terminating on signal 15
Aug 20 15:47:49 mysite.com-GER postfix/postfix-script[11292]: warning: group or other writable: /usr/lib/postfix/./libpostfix-master.so.1
Aug 20 15:47:49 mysite.com-GER postfix/postfix-script[11293]: warning: group or other writable: /usr/lib/postfix/./libpostfix-util.so.1
Aug 20 15:47:49 mysite.com-GER postfix/postfix-script[11294]: warning: group or other writable: /usr/lib/postfix/./libpostfix-tls.so.1
Aug 20 15:47:49 mysite.com-GER postfix/postfix-script[11295]: warning: group or other writable: /usr/lib/postfix/./libpostfix-dns.so.1
Aug 20 15:47:49 mysite.com-GER postfix/postfix-script[11296]: warning: group or other writable: /usr/lib/postfix/./libpostfix-global.so.1
Aug 20 15:47:49 mysite.com-GER postfix/postfix-script[11297]: warning: group or other writable: /usr/lib/postfix/./sbin/lmtp
Aug 20 15:47:49 mysite.com-GER postfix/postfix-script[11298]: warning: group or other writable: /usr/lib/postfix/sbin/./lmtp

postfix check
postfix/postfix-script: warning: group or other writable: /usr/lib/postfix/./libpostfix-master.so.1
postfix/postfix-script: warning: group or other writable: /usr/lib/postfix/./libpostfix-util.so.1
postfix/postfix-script: warning: group or other writable: /usr/lib/postfix/./libpostfix-tls.so.1
postfix/postfix-script: warning: group or other writable: /usr/lib/postfix/./libpostfix-dns.so.1
postfix/postfix-script: warning: group or other writable: /usr/lib/postfix/./libpostfix-global.so.1
postfix/postfix-script: warning: group or other writable: /usr/lib/postfix/./sbin/lmtp
postfix/postfix-script: warning: group or other writable: /usr/lib/postfix/sbin/./lmtp

Answer 1

Look wider. It's time to get the hell out of Ubuntu. And I'm not kidding. I read questions here: either postfix, then mysql, then php, then something else. Problems people have with ubuntu
Consider options with a source-based OS like Gentoo or FreeBSD, or something
else
IMHO, ubunta is good as a desktop, but never as a server