These are examples of a direct marketing strategy called an email blast or eblast, used by a business to reach potential customers. Eblasts can be used to share special offers, newsletters, or upcoming events with a desired audience. By offering customers the option of receiving these eblasts, businesses can create a list of contacts to send eblasts to. If a customer decides they don’t want to receive these messages anymore then they can choose to opt-out at any time.