The SMTP protocol has no means to prevent abuse of the mail system, in particular there are no simple and effective tools to control which messages are delivered in box of a user (authorization), and also reported no sender authentication by a message . This includes the possibility of different types of abuse.
what is electronic mail or e-mail
Electronic mail | e-mail | Part 3
The references to the To: and CC:, proposes an approach typical of the mailing list in which all communicate with everyone. Mailing lists, however, should be organized by providing a single reference address for everyone, from which the moderator shall dispatch a copy of each message to each of the members
Electronic mail | e-mail | Part 2
t was originally composed of plain text. Was subsequently introduced the possibility to include files in an e-mail (attachments), such as sending images or documents. To do this the sender’s mail client uses MIME encoding (uuencode or more obsolete)
Electronic mail | e-mail | Part 1
Electronic mail or e-mail (from ‘electronic mail’) is an Internet service from which the user can send or receive messages. It is the Internet application most known and used today. Its creation dates back to 1972, when Ray Tomlinson installed on the ARPANET system able to exchange messages between different universities