The smtpd package is a useful mail daemon for stopping spam, thereby saving money and resources. This is still true even today as we see increasing numbers of multimedia-based applications on the Internet.
People still use e-mail more than web browsers and file transfer programs.
More and more people are getting onto the Internet, and the first thing they do is get an e-mail address. Realizing this, certain individuals and even organizations have taken the opportunity to send unsolicited e-mail to Internet users. Most of this mail is commercial advertising. They send thousands of copies of the same message to a list of e-mail addresses obtained from either Usenet postings or companies' home pages. Such action is called spamming.