SMTP (Simple Mail
Transfer Protocol) is a TCP/IP protocol used in sending and receiving e-mail. However,
since it's limited in its ability to queue messages at the receiving end, it's
usually used with one of two other protocols, POP3 or IMAP, that let the user
save messages in a server mailbox and download them periodically from the
server. Users typically use a program that uses SMTP for sending e-mail and
either POP3 or IMAP for receiving messages that have been received for them at
their local server.
POP - Post Office
Protocol(POP) is a standard
mail server commonly used on the Internet. It provides a message store that
holds incoming e-mail until users log on and download it. POP3 is a simple
system with little selectivity. All pending messages and attachments are
downloaded at the same time. POP3 uses the SMTP messaging protocol.
Mail Relay - The use of a mail server from a connection outside
of the immediate network. Open Mail Relays are the source of most originating
junk e-mail.
MX Record Mail
Exchange Record. A DNS resource record type indicating which host can handle electronic
mail for a particular domain.
Mail client - An e-mail program that resides in the user's
computer and has access to mail servers on a network.
Last Updated
9th of June, 2008
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