email addresses are things people can contact you through if you give them it. Many people have an account (so when you log on using your email address you can read all the messages or mail people...
Really, it depends on which mail service you are using. Mostly, however, you click "New" or "Compose", then type in their email where it says "To:" or "Receptaints email". then in the big box or the...
You can actually find the physical location of the system which has been used to send an email. You can do this by analysing the header of an email. Normally the header of email will contain the...