Milter-greylist

Hi,

I would like to use milter-greylist as an extension of sendmail. My  
distro is RHEL7. I have used EPEL-repo to install the milter-greylist  
package.
My problem is that the dumpfile option in the configuration file does  
not work. I mean nothing has been dumped until now.

You can find the related row  below in the conf file.
dumpfile "/var/lib/milter-greylist/db/greylist.db" 600

Designated file exists and its permission is as shown. Also grmilter  
user can read and write this file.
[root@localhost ~]# ll /var/lib/milter-greylist/db/greylist.db
-rw------- 1 grmilter grmilter 0 Tem 25 17:07  
/var/lib/milter-greylist/db/greylist.db

By the way I am using milter-greylist as a ratelimiter. What should I  
check else?

Thanks.

Can