If you wish to receive all emails from a particular domain, log in to Roaring Penguin and follow the steps below.
1. Type the domain you wish to approve in the box that appears under the Accept and Reject List heading.
2. Choose the Always accept mail from… option from the drop-down menu and click the Add button.
Note: Approving a domain will allow any email address associated with that domain to bypass the spam filter. Emails will still be scanned for viruses. As spammers often make it appear that they are sending emails from your domain, any attempts to approve the domain that you belong to will be ignored by the system.