Deletes an email forwarding rule from a domain.
Authenticate via HTTP Basic with your account username and API token. Examples use an explicit 'Authorization: Basic <base64(username:token)>' header; 'curl -u username:token' is equivalent. For sandbox, append "-test" to your username and use your sandbox token on api.dev.name.com.
DomainName is the domain to delete the email forwarded box from.
EmailBox is which email box to delete.
Email Forwarding entry successfully deleted.