Email is a modern commodity that many of us use quite frequently. It certainly beats sending a carrier pigeon somewhere or having to wait days for your letter to reach someone. However is can also be a bad thing as it makes junk mail much easier to reach you. Email is great because you can do just about anything with it a letter can except you can attach files to the email.
Email however, does have its flaws. When an email is sent from your account there is no way to tell if you really sent the email or not. This can lead to some people deciding to send mass emails from your account. This has happened at my school several times. The emails were usually sent by the same offender. Luckily I personally have kept my account safe from others. This goes to serve as a warning, always log out or use incognito on a computer that isn't yours.