Overview

This article describes the process to follow when spam emails that come from unknown senders are not blocked by Greylist.

Root Cause

There are multiple possible causes for the filter malfunction:

• The filter is not enabled.
• A misconfiguration.
• The database is corrupted.

Resolution

Verify the operation of Greylist as follows:

• Confirm that Greylist is enabled.
  1. Go to Anti-Spam > Anti-Spam Filters > Greylist.
  2. From the General tab select/unselect Enable Greylist to enable/disable Greylist.
     
     
• Verify the 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.
    
    
• Use esentutl.exe to ensure that the Greylist database is not corrupted. In order to perform this, please refer to The AntiSpam Quarantine or Greylisting Database Is Corrupt article.

Confirmation

Greylist starts blocking emails as they meet the rules, you can confirm if an email was blocked by Greylist from the MailEssentials Dashboard.