Cisco Cisco Email Security Appliance C170 Guia Do Utilizador
Chapter 5 Configuring the Gateway to Receive Email
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Cisco IronPort AsyncOS 7.1 for Email Configuration Guide
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Receiving Email with Listeners
The IronPort AsyncOS operating system allows the IronPort appliance to function
as the inbound email gateway for your enterprise, servicing SMTP connections
from the Internet, accepting messages, and relaying messages to the appropriate
systems.
as the inbound email gateway for your enterprise, servicing SMTP connections
from the Internet, accepting messages, and relaying messages to the appropriate
systems.
In this configuration, you enable listeners to service these connections. A listener
describes an email processing service that will be configured on a particular IP
interface. Listeners only apply to email entering the IronPort appliance — either
from the internal systems within your network or from the Internet. IronPort
AsyncOS uses listeners to specify criteria that messages must meet in order to be
accepted and relayed to recipient hosts. You can think of a listener as an “email
injector” or even a “SMTP daemon” running on a specific port for each IP address
you specify (including the initial addresses you configured with the
describes an email processing service that will be configured on a particular IP
interface. Listeners only apply to email entering the IronPort appliance — either
from the internal systems within your network or from the Internet. IronPort
AsyncOS uses listeners to specify criteria that messages must meet in order to be
accepted and relayed to recipient hosts. You can think of a listener as an “email
injector” or even a “SMTP daemon” running on a specific port for each IP address
you specify (including the initial addresses you configured with the
systemsetup
command).
Mail delivery policies cannot be configured so that mail is delivered to multiple
ports on a single IP address (for example, port 25 for normal delivery and port
6025 for IronPort Spam quarantine). IronPort Systems recommends running each
delivery option on a separate IP address or host. Further, it is not possible to use
the same hostname for regular email delivery and quarantine delivery.
ports on a single IP address (for example, port 25 for normal delivery and port
6025 for IronPort Spam quarantine). IronPort Systems recommends running each
delivery option on a separate IP address or host. Further, it is not possible to use
the same hostname for regular email delivery and quarantine delivery.
The System Setup Wizard or the
systemsetup
command (CLI) initially
configures the IP interfaces that run on the available Ethernet interfaces on the
IronPort appliance. On IronPort C10 and C100 appliances, these Ethernet
interfaces are labeled Data1 and Data2. On all other IronPort appliances, they are
labeled Data1, Data2, and Management. You can edit these interfaces at a later
time via the IP Interfaces page on the Network menu or the
IronPort appliance. On IronPort C10 and C100 appliances, these Ethernet
interfaces are labeled Data1 and Data2. On all other IronPort appliances, they are
labeled Data1, Data2, and Management. You can edit these interfaces at a later
time via the IP Interfaces page on the Network menu or the
interfaceconfig
command. If you have completed the GUI’s System Setup Wizard (or the
systemsetup
command) and committed the changes, at least one listener should
already be configured on the appliance. (Refer to the settings you entered in the
.) The specific addresses to accept mail for were
entered at that time, as well as the first SMTP Routes (Network > SMTP Routes
or
or
smtproutes)
entry.