One who intakes a message the sender says is called receiving, or being a receiver. After the receiver receives the message from the sender, they must decode it. Decoding a message is revealing what the message means either to yourself or relating it to memories or expierences.
For instance, if you were to attend a rock concert. As the singer encodes and sends the messages from his/her song, you, the receiver, decode the messages or meanings you have and related them to yourself or to memories of yours.