An arrow is shown that ends at a rectangle with the word Messages written on it. Another arrow connects the Messages rectangle to a mail rectangle. Three arrows connected this mail rectangle to a to rectangle, a from rectangle, and a body rectangle. An arrow connects the to rectangle to a rectangle that has abc@example.com written on it. An arrow connects the from rectangle to a xyz@example.com rectangle. An arrow connects the body rectangle to a rectangle that has Hello! How are you? written on it.