my /etc/logrotate.d/maillog;
---------------------------------

# cat /etc/logrotate.d/maillog 
/var/log/maillog {
        size=1030M
        daily
        maxage 14
        rotate 7
        missingok
        postrotate
                /etc/init.d/syslog restart
        endscript
}


logrotate is supposed to run via cron.daily