Smtp Redirect; Chapter 15 Smtp Redirect; Smtp Redirect Overview; Smtp - ZyXEL Communications UAG Series Cli Reference Manual

This chapter shows you how to configure SMTP redirection on your UAG.

15.1 SMTP Redirect Overview

SMTP redirect forwards the authenticated client's SMTP message to a SMTP server, that handles all
outgoing e-mail messages. The UAG forwards SMTP traffic using TCP port 25.

15.1.1 SMTP

Simple Mail Transfer Protocol (SMTP) is the Internet's message transport standard. It controls the
sending of e-mail messages between servers. E-mail clients (also called e-mail applications) then
use mail server protocols such as POP (Post Office Protocol) or IMAP (Internet Message Access
Protocol) to retrieve e-mail. E-mail clients also generally use SMTP to send messages to a mail
server. The older POP2 requires SMTP for sending messages while the newer POP3 can be used with
or without it. This is why many e-mail applications require you to specify both the SMTP server and
the POP or IMAP server (even though they may actually be the same server).

15.2 SMTP Redirect Commands

The following table identifies the values required for many of these commands. Other input values
are discussed with the corresponding commands.
Table 57 Input Values for SMTP Redirect Commands
LABEL
interface_name
domain_name
address_object
user_name
UAG CLI Reference Guide
C
DESCRIPTION
The name of the interface.
See Table 13 on page 55 for detailed information about the interface name.
Fully-qualified domain name. You may use up to 254 alphanumeric characters, dashes
(-), or periods (.), but the first character must be alphanumeric.
The name of an IP address (group) object. You may use 1-31 alphanumeric characters,
underscores(_), or dashes (-), but the first character cannot be a number. This value is
case-sensitive.
The name of a user (group). You may use 1-31 alphanumeric characters,
underscores(_), or dashes (-), but the first character cannot be a number. This value is
case-sensitive.
HAPTER

SMTP Redirect

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