- noun a standard protocol which allows electronic mail messages to be transferred from one system to another, normally used as the method of transferring mail from one Internet server to another or to send mail from a computer to a server.
- acronym forPOP 3
- Abbreviation of Simple mail transfer Protocol. A protocol used for sending, forwarding, and routing emails. It is usually utilized along with an email protocol such as POP or IMAP, for message retrieval and storage. Thus, an email program might use SMTP as the outgoing mail server, and POP or IMAP as the incoming mail server.
- acronym forsimple mail transfer protocol.
- noun a system used to transfer electronic mail messages between a user’s computer and a server such as one at an ISP.