Definition – What does SMTP (Simple Mail Transfer Protocol) mean?
SMTP (Simple Mail Transfer Protocol) is a standard protocol that is used to send and receive emails. Your email clients such as Outlook and Eudora uses these protocols to send a message to the mail servers, and mail server uses SMTP to relay that message to the correct receiving mail server. It is a TCP/IP protocol that allows the transmission and delivery of email over the Internets. The protocol is created and maintained by the IETF (Internet Engineering Task Force). SMTP is also known as an RFC 821 and RFC 2821.
Glossary Web explains SMTP (Simple Mail Transfer Protocol)
SMTP is known as the most common protocols for email communication over the Internet, and it offers intermediary network services between the remote email providers and organizational email server and the local user accessing it. The protocol is usually integrated within an email client application and is composed of four different key components such as Mail User Agent (MUA), Mail Submission Agent (MSA), Mail Transfer Agent (MTA) and Mail Delivery Agent (MDA).