My secondary account (email@example.com) is intended for Apple communications only. The reason for this is they will not accept my primary address. If someone wanted my FaceTime, or iMessage ID, this is the address they will receive. In addition, any email sent to this address will forward to my primary address, and in turn – replies will be from the primary address. This address similar to my primary address provides my first name, and last name (surname). One strange thing is the ending which is .co and not .com. At the time I checked, pilone.com was already registered.