Greylisting is a WHM feature that reduces spam by temporarily deferring suspicious emails. Legitimate mail servers will retry delivery, while spam sources typically won't. This guide shows you how to enable and configure Greylisting to improve your email security.

How to Configure Greylisting

  1. Step 1: Access WHM

    Log in to WHM as the root user.

  2. Step 2: Navigate to Greylisting

    Use the search bar to find "Greylisting" and open the Greylisting Configuration interface.

  3. Step 3: Enable Greylisting

    Click the "OFF" button to activate Greylisting.

  4. Step 4: Configure Greylisting Settings

    Choose to use the default settings or customize them according to your needs.

  5. Step 5: Add Trusted Hosts

    Use the "Trusted Hosts" section to define hosts that you commonly receive email from and do not want Greylisting to affect.

  6. Step 6: Configure Common Mail Providers

    Navigate to the "Common Mail Providers" section and edit as needed to exclude major email providers from greylisting.

  7. Step 7: Monitor Deferred Emails

    Use the "Reports" tab to view deferred emails categorized by sender IP address, From Address, and To Address.