Simple Mail Transfer Protocol (SMTP)
Definition - 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.
SMTP is an application-layer protocol that enables the transmission and delivery of email over the Internet. SMTP is created and maintained by the Internet Engineering Task Force (IETF).
Simple Mail Transfer Protocol is also known as RFC 821 and RFC 2821.
Techopedia explains Simple Mail Transfer Protocol (SMTP)
SMTP is generally integrated within an email client application and is composed of four key components:
- Local user or client-end utility known as the mail user agent (MUA)
- Server known as mail submission agent (MSA)
- Mail transfer agent (MTA)
- Mail delivery agent (MDA)
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