A smart host is a type of email message transfer agent which allows an SMTP server to route email to an intermediate mailserver rather than directly to the recipient’s server. Often this smart host requires authentication from the sender to verify that the sender has privileges to have mail forwarded through the smart host. This is an important distinction from an open mail relay that will forward mail from the sender without authentication. Common authentication techniques include SMTP Authentication and POP before SMTP.
Read more about Smart Host: Use For Backup Mail (secondary MX) Services, Use in Spam Control Efforts, See Also
Famous quotes containing the words smart and/or host:
“Angel: Even elephants are afraid of me.
Brad: They’re smart animals. Women are poison.
Angel: But it’s a wonderful death.”
—Fredric M. Frank (1911–1977)
“When the guests have left, the host is at peace.”
—Chinese proverb.