What is SMTP?
SMTP (Simple Mail Transfer Protocol) is the method that mail servers use to communicate. The usual method of sending mail is your mail client will contact the given SMTP server which looks up the MX record for the destination domain then transports the mail to the destination. If the destination denies this mail it sends a bounce message to the sender, in this case the address in the ‘from’ field of the mail. Attention: SMTP does not work for AOL or Wanadoo customers. The SMTP server is the same but the port number is 1111.
(simple mail transfer protocol) When you’re exchanging electronic mail on the Internet, SMTP is what keeps the process orderly. It’s a protocol that regulates what goes on between the mail servers. What is an Intranet? A play on the word Internet, an intranet is a restricted-access network that works like the Web, but isn’t on it. Usually owned and managed by a corporation, an intranet enables a company to share its resources with its employees without confidential information being made available to everyone with Internet access. What is an Extranet? Companies often use extranets to provide nonpublic information to a select group of people, such as business partners or customers. So while an extranet may look like an ordinary Web site, you have to enter a password or use digital encryption to access it. For example, Federal Express’s customers can track packages on the company’s extranet by simply entering a tracking number. And Bank of America’s extranet lets users transfer funds or
