Cisco Cisco Email Security Appliance C160 Guia Do Utilizador
Chapter 8 Anti-Spam
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Cisco IronPort AsyncOS 7.1 for Email Configuration Guide
OL-22158-02
Figure 8-12
Mail Relayed by MX/MTA — Simple
shows two other, slightly more complicated examples of how mail
may be relayed inside the network and how mail may be processed by several
servers within the network before it is passed to the IronPort appliance. In
example A, mail from 7.8.9.1 passes through the firewall and is processed by an
MX and an MTA before being delivered to the IronPort appliance. In example B,
mail from 7.8.9.1 is sent to a load balancer or other type of traffic shaping
appliance and is sent to any one of a range of MXs prior to being delivered to the
IronPort appliance.
servers within the network before it is passed to the IronPort appliance. In
example A, mail from 7.8.9.1 passes through the firewall and is processed by an
MX and an MTA before being delivered to the IronPort appliance. In example B,
mail from 7.8.9.1 is sent to a load balancer or other type of traffic shaping
appliance and is sent to any one of a range of MXs prior to being delivered to the
IronPort appliance.
IronPort Email Security appliance
Firewall
MX / MTA
Sending
Machine
Machine
IP: 7.8.9.1
IP: 10.2.3.4
IP: 10.2.3.5