Sudoers

The file /etc/sudoers lists users authorized to run certain commands as other users. Edit this file if necessary with the visudo command. You should see some lines like the following, though the versions of postfix and openldap should match what's on your system rather than what is here.

# grep zimbra /etc/sudoers
%zimbra   ALL=NOPASSWD:/opt/zimbra/openldap-2.3.21/libexec/slapd
%zimbra   ALL=NOPASSWD:/opt/zimbra/postfix-2.2.9/sbin/postfix, /opt/zimbra/postfix-2.2.9/sbin/postalias, /opt/zimbra/postfix-2.2.9/sbin/qshape.pl, /opt/zimbra/postfix-2.2.9/sbin/postconf,/opt/zimbra/postfix-2.2.9/sbin/postsuper
%zimbra   ALL=NOPASSWD:/opt/zimbra/libexec/zmqstat
%zimbra ALL=NOPASSWD:/opt/zimbra/libexec/zmtomcatstart
%zimbra ALL=NOPASSWD:/opt/zimbra/perdition/sbin/perdition

# ls -l /opt/zimbra/openldap /opt/zimbra/postfix
lrwxrwxrwx  1 root root 27 May  9 14:23 /opt/zimbra/openldap -> /opt/zimbra/openldap-2.3.21
lrwxrwxrwx  1 root root 25 May  9 14:23 /opt/zimbra/postfix -> /opt/zimbra/postfix-2.2.9

Please also note it is advisable to check if the requiretty option is set. This is done as follows

# grep requiretty /etc/sudoers
Defaults    requiretty

Using the visudo command comment it out like so. Please note the first # indicates root prompt, the second line # indicates the comment

# visudo
#Defaults    requiretty