E-mail allows people to send documents, images, and files electronically. It requires an internet connection and email account from an internet service provider. An email contains a recipient address, optional carbon copy and blind carbon copy addresses, and can include attachments. Features include automatic replies, forwarding, filing, and time stamps. Advantages are ease of use, speed, and ability to send files and copies to groups. Disadvantages include needing the recipient's address, potential for spam, viruses from attachments, and delayed responses.