1. Enter SPAM Expert dashboard via client area. If user is not familiar with this then may refer to the below guideline: (How To Enter SPAM Expert Dashboard) Please click here. 2. Once enter, click on "Sender Allowlist" button under "Allowlist/Blocklist" session.3. Key in the email address or hostname that you with to allowlist.4. Click on "Add" to allowlist the email address / hostname.