Email is a cheap and effective way to keep in touch. You can send a message to any email address in the world, and your letter will usually arrive at its destination within seconds.
What is email?
What is an email address?
Who can send me email?
How can I save all the email I'm getting?
What is "undeliverable" email?
Why am I getting returned mail for messages I never sent?
Why can't I send my email?
I used to send email to all my friends, but it all gets returned now. Why?
I can't check my email. Is my Internet connection lost?