By default, the IP Profiler function does not automatically remove a temporarily blocked IP address. Mail clients from these blocked IP addresses will always get a 421 error.

These IP addresses have to be manually removed by the IMSS administrator. There is a hidden key that should be added to the foxdns.ini file. This will remove the  blocked IP address automatically and according to the interval set by the key.

To automatically remove the blocked IP:

1. Stop the IMSVA foxdns service. Run the following command:

   IMSSHOME/script/S99FOXDNS stop

2. Go to the /opt/trend/imss/config directory and then open the foxdns.ini file.
3. Add the following parameter under the [foxdns] section:

   keep_tempblocked_mins=#

   Note: The unit, #, is in minutes.

   Example: "keep_tempblocked_mins=1440"

   This means that the default time is 24 hours.

4. Start the IMSVA foxdns service. Run the following command:

   IMSSHOME/script/S99FOXDNS start