Reminder

How do you write an email? It seems a stupid question. However, I did get a few pieces of silly message from you. I could recognize neither the writer nor the subject.
This is only a reminder for you. You have to make your message clear for your reader. Please write YOUR NAME and a topic sentence at the SUBJECT wondow. After finish writing your email, please type YOUR NAME again, better with your contact information, so the reader will know who you are and what you are talking about. Alternatively, you can set a signature for your email. This is a common rule for writing email.