Always sends the requested disposition notification. That means that the author of the message gets to know when the message was acted upon and, in addition, what happened to it (displayed, deleted, & etc;). This option is strongly discouraged, but since it makes sense where privacy is not a concern, & eg; in customer relationship management, it has been made available.
Envía sempre a notificación de entrega pedida. Isto significa que o autor da mensaxe sabe cando se actuou sobre a mensaxe e, ademais, o que lle aconteceu (foi mostrada, eliminada, & etc;). Non se recomenda esta opción para nada, mais está disponíbel dado que ten sentido onde a privacidade non sexa un problema, & eg; na xestión de relacións cos clientes.