Cisco Cisco Email Security Appliance X1070 Guía Del Usuario
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Cisco AsyncOS 8.5.5 for Email Security 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.
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
and
•
The header that will label the IP address of the original external sender.
Cisco IronPort Email Security appliance
Firewall
MX
Sending
Machine
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 2
Hop 1
MX
IP: 10.2.5.1-n
MX
IP: 10.2.6.1
Mail Filter
Hop 1
A
B