Something put in a package or
Envelope or email
Noteworthy of passing along or needed
Deemed beneficial for the other it's sent to
"You've got mail!" was so exciting when it first became part of our world and language. Now anything and everything is sent via email today out of convenience, but how much of it is necessary? The sender believes it is beneficial for the receiver OR they are looking to benefit themselves in some way.
Christians know and believe the greatest something or someone was sent from heaven above for the benefit of all; sent out of love, with mankind's best in mind.