Cisco Cisco Content Security Management Appliance M390 Guía Del Usuario
C H A P T E R
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Cisco IronPort AsyncOS 8.0 for Security Management User Guide
11
Configuring SMTP Routing
This chapter explains the features that affect routing and delivery of email traveling through the Security
Management appliance, and use of the SMTP Routes page and smtproutes command.
Management appliance, and use of the SMTP Routes page and smtproutes command.
Routing Email for Local Domains
The Security Management appliance routes the following mail:
•
ISQ released messages which ignore SMTP routing
•
Alerts
•
Configuration files that can be mailed to the specified destination
•
Support request message that can be sent to the defined recipient as well
The last two types of messages use SMTP routes to be delivered to the destination.
The Email Security appliance routes mail to local domains to hosts specified using the Management
Appliance > Network > SMTP Routes page (or the smtproutes command). This feature is similar to
the sendmail mailertable feature. (The SMTP Routes page and smtproutes command are an expansion
of the AsyncOS 2.0 Domain Redirect feature.)
Appliance > Network > SMTP Routes page (or the smtproutes command). This feature is similar to
the sendmail mailertable feature. (The SMTP Routes page and smtproutes command are an expansion
of the AsyncOS 2.0 Domain Redirect feature.)
Note
If you have completed the System Setup Wizard in the GUI and committed the changes, you defined the
first SMTP route entries on the appliance for each RAT entry you entered at that time.
first SMTP route entries on the appliance for each RAT entry you entered at that time.
SMTP Routes Overview
SMTP Routes allow you to redirect all email for a particular domain to a different mail exchange (MX)
host. For example, you could make a mapping from
host. For example, you could make a mapping from
example.com
to
groupware.example.com
. This
mapping causes any email with
@example.com
in the Envelope Recipient address to go instead to
groupware.example.com
. The system performs an “MX” lookup on
groupware.example.com
, and then
performs an “A” lookup on the host,
just like a normal email delivery. This alternate MX host does not
need to be listed in DNS MX records and it does not even need to be a member of the domain whose
email is being redirected. The Cisco IronPort AsyncOS operating system allows up to ten thousand
(10,000) SMTP Route mappings to be configured for your Cisco IronPort appliance. (See
email is being redirected. The Cisco IronPort AsyncOS operating system allows up to ten thousand
(10,000) SMTP Route mappings to be configured for your Cisco IronPort appliance. (See
.)