Whenever you unblock a legitimate message that was moved to your spam folder, Cloudmark DesktopOne asks you whether you want to always receive messages from this sender. If you click Yes, the sender is automatically added to your Approved Senders list.
You can also manually add senders to your Approved Senders list as explained below:
The Account Settings window appears.
The Edit Approved Senders window appears.
All email from this sender will be whitelisted.
All email from all senders in this domain will be whitelisted.
All email from all senders in this domain and its subdomains (such as host1.domain.com, host2.domain.com, and so on) will be whitelisted.