check process sendmail with pidfile /var/run/sendmail.pid
    start program = "/etc/init.d/sendmail start"
    stop program  = "/etc/init.d/sendmail stop"
   if failed port 25 protocol smtp then restart
   if 5 restarts within 5 cycles then timeout
   group services

 check file virtusertable with path "/etc/mail/virtusertable"
   if changed timestamp then exec "/sbin/service sendmail restart"
   group services