Cisco Cisco Email Security Appliance X1070 Mode D'Emploi

 expands the illustration shown in 

 to include the processing 

sequence of a listener’s HAT and (if applicable) RAT, and the default values for 
each. 

Private Listener 

IronPort Email 

Security appliance

Public Listener 

Internet:

Hosts:        Many
Recipients: Limited

Internal Network:

Hosts:         Limited
Recipients: Many

Host Access Table (HAT) 

Host

ACCEPT

Host

RELAY

ALL

ACCEPT

Recipient Access Table (RAT) 

Domain

ACCEPT

ALL

REJECT

Host Access Table (HAT) 

Host

RELAY

ALL

REJECT

Public:

Private:

No RAT