If you're sending me an email, let's say on a command-line interface, you wouldn't write "Incoming Email" as your rp before the message, you would write something like:
Programming Email Interface
Message Reads...
[message]
Message Ends...
Sending Email...
This makes more sense because it's on YOUR end, you aren't the one receiving, you are the one sending, and thus, to rp receiving is to powergame my character, who is receiving the email you SENT.
