Greylist is not working

Issue encountered

Spam emails that come from unknown senders are not blocked by Greylist.


Possible causes for this filter to malfunction:

  • The filter is not enabled.
  • It is misconfigured.
  • The database is corrupted.


To verify the operation of Greylist:

Step 1: Confirm that Greylist is enabled

From the Greylist properties, ensure that Enable Greylist is selected. For more information refer to Greylist.

Step 2: Verify excluded addresses

From the IP and Email exclusions in Greylist properties, ensure that there are no exclusions that exclude all emails from being processed, such as *@*.com.

Step 3: Use esentutl.exe to ensure that the Greylist database is not corrupted.

For more information refer to