yes, the sudoers file contains these lines:
user ALL=NOPASSWD:/opt/zimbra/openldap/libexec/slapd
user ALL=NOPASSWD:/opt/zimbra/postfix/sbin/postfix
user ALL=NOPASSWD:/opt/zimbra/postfix/sbin/postalias
when I start postfix, it shows these warnings:
postfix/postfix-script: warning: not owned by group postdrop: /opt/zimbra/postfix-2.2.3/sbin/postdrop
postfix/postfix-script: warning: not set-gid or not owner+group+world executable: /opt/zimbra/postfix-2.2.3/sbin/postdrop
postfix/postfix-script: starting the Postfix mail system
But it's ok, I realize that the Postfix is still running. The first two warnings can be fixed by:
chown root
ostdrop /opt/zimbra/postfix-2.2.3/sbin/postdrop
chmod g+s /opt/zimbra/postfix-2.2.3/sbin/postdrop
Thanks!