Cisco Cisco Email Security Appliance C170 Guia Do Utilizador

If you include an M-Series appliance in your configuration, mail is sent to the 
IronPort M-Series appliance from other IronPort (C- and X-Series) appliances. 
An IronPort appliance that is configured to send mail to an IronPort M-Series 
appliance will automatically expect to receive mail released from the M-Series 
appliance and will not re-process those messages when they are received back — 
messages will bypass the HAT and other policy or scanning settings and be 
delivered. For this to work, the IP address of the IronPort M-Series appliance must 
not change. If the IP address of the IronPort M-Series appliance changes, the 
receiving C- or X-Series appliance will process the message as it would any other 
incoming message. Always use the same IP address for receiving and delivery on 
the IronPort M-Series appliance.

The IronPort M-Series appliance accepts mail for quarantining from the IP 
addresses specified in the IronPort Spam Quarantine settings. To configure the 
local quarantine on the IronPort M-Series appliance see the IronPort AsyncOS for 
Security Management User Guide . Note that the local quarantine on the IronPort 
M-Series appliance is referred to as an external quarantine by the other IronPort 
appliances sending mail to it.

Mail released by the IronPort M-Series appliance is delivered to the primary and 
secondary hosts (IronPort appliance or other groupware host) as defined in the 
Spam Quarantine Settings (see the IronPort AsyncOS for Security Management 
User Guide ). Therefore, regardless of the number of IronPort appliances 
delivering mail to the IronPort M-Series appliance, all released mail, 
notifications, and alerts are sent to a single host (groupware or IronPort 
appliance). Take care to not overburden the primary host for delivery from the 
IronPort M-Series appliance.