Cisco Cisco Email Security Appliance C170 사용자 가이드

13-16

Cisco AsyncOS 8.5 for Email User Guide

Chapter 13 Anti-Spam

Determining Sender IP Address In Deployments with Incoming Relays

Figure 13-5

Mail Relayed by MX/MTA — Advanced

Configuring the Appliance to Work with Incoming Relays

Enabling the Incoming Relays Feature

Note

You should only enable the incoming relays feature if a local MX/MTA relays mail to your Cisco
appliance.

Procedure

Step 1

Select Network > Incoming Relays.

Step 2

Click Enable.

Step 3

Commit your changes.

Adding an Incoming Relay

Add incoming relays to identify:

•

Each machine on your network that will relay incoming messages to your Email Security appliance,
and

•

The header that will label the IP address of the original external sender.

Cisco IronPort Email Security appliance

Firewall

Sending
Machine

IP: 7.8.9.1

IP: 10.2.3.4

IP: 10.2.3.6

MTA

IP: 10.2.3.5

Hop 2

Hop 1

IP: 10.2.5.1-n

IP: 10.2.6.1

Mail Filter

Hop 1