The SMTP or 'Simple mail transfer protocol' is a basic way for email sending. It's first introduced in 1982, and the last update came in 2008. Without properly configuring it, sending emails from a website is impossible. Today, we discuss- Why SMTP Is Important than server default Mailing system. Superior Technology: It is an essential technology for sending and receiving emails that we always use. The SMTP helps to send out emails and it uses the domain name in the receiver’s email address to properly connect to the receiver’s email-server. Any professional SMTP will make sure the sending rate will not fall as it should for any free email providers.