NEC NVM-Professional User Manual page 26

SMTP - Simple Mail Transport Protocol
SMTP - Simple Mail Transport Protocol
SMTP (Simple Mail Transfer Protocol) is a TCP/IP protocol used in sending Email.
SMTP uses a spooled or queued method of mail delivery. Once a message has
been sent to a destination, the message is spooled to a device, usually a disk.
However, since it is limited in its ability to queue messages at the receiving end, it is
usually used with one of two other protocols, POP3 or IMAP, that lets the user save
messages in a server mailbox and download them periodically from the server.
Typically, a program that uses SMTP sends messages from a mail client to a mail
server and a program using either POP3 or IMAP retrieves messages from the
server to an Email client. Microsoft Exchange includes an SMTP server and can
also be set up to include POP3 support.
POP3 (Post Office Protocol 3) is the most recent version of a standard protocol for
receiving Email. POP3 is a client/server protocol in which Email is received and
held in a single mailbox on the server. Periodically, the client Email receiver checks
the mailbox on the server and downloads any mail. POP3 can be thought of as a
"store-and-forward" service. POP3 is designed to delete mail on the server as soon
as the user has downloaded it. However, some implementations allow users or an
administrator to specify that mail be saved for some period of time. The POP3
protocol is built into most popular Email products, such as Eudora and Outlook
Express. It's also built into the Netscape and Microsoft Internet Explorer browsers.
The IMAP (Internet Message Access Protocol) is an alternative protocol for
accessing Email from your local server. IMAP represents an improvement over POP
by allowing a client to access and manipulate Email messages on a server such as
retaining messages and organizing them in folders. IMAP4 is a client/server
protocol in which Email is received and held by the server. IMAP can be thought of
as a "remote file server". The Email client can view just the heading and the sender
of the letter and then decide whether to download the mail. You can also create and
manipulate multiple folders or mailboxes on the server, delete messages, or search
for certain parts or an entire note. IMAP requires continual access to the server
during the time that you are working with your mail.
22 NVM Voice Mail Win2K/SMTP Email Integration