This is probably because most people don't really care about why you're sending the email. They just to know what you'd like or what question you have. That's just my guess.
Poe's works are considered scary or frightening. They CONVEY (add feeling, communicate) this mood.
Mary Jackson prepared an assignment but John Becker was not ready to approve the result of the assignment which led to the disagreement between them.
It became evident later that John Becker had the wrong input data which made him the wrong party in the disagreement.
A boy named Santosh was going to the market. He saw an umbrella lying on the road. He picked it up and went to police station. There he met the owner of the umbrella. He looked very angry and asked Santosh for explaining him. Santosh said 'I saw this umbrella on road so I brought it here.' The man believed him and took his umbrella back and returned home and Santosh went back to the market.