What Does Simple Mail Transfer Protocol (SMTP) Mean?
Simple Mail Transfer Protocol (SMTP) is the standard protocol for email services on a TCP/IP network. SMTP provides the ability to send and receive email messages.
Techopedia Explains Simple Mail Transfer Protocol (SMTP)
SMTP is one of the most common and popular protocols for email communication over the Internet and it provides intermediary network services between the remote email provider or organizational email server and the local user accessing it.