When using the system, emails should be send with a "from" address that is a valid domain name. This domain name may be one that the client controls, or any other domain name that is valid. Any valid domain name may be used, but the following domain names have been specifically configured for phishingbox.
You can use your own custom domains within the system. However, there are already domains setup with proper CNAMES and SPF records created. These domains include, but are not limited to, the following.
NOTE: If an outside domain name is used, the user should have authorization to use the domain.