diff --git a/etc/init/smtp.conf b/etc/init/smtp.conf
index 4d801f6..715edce 100644
--- a/etc/init/smtp.conf
+++ b/etc/init/smtp.conf
@@ -9,6 +9,7 @@ stop on runlevel [016]
 console none
 
 script
+	/sbin/CheckPid /var/run/sendmail.pid
 	if [ -f /etc/mail/sendmail.cf ]; then
 		/usr/sbin/sendmail -bD -q30m -om
 	fi