Cisco Cisco Email Security Appliance C170 Guia Do Utilizador

Which bounce profile should be used by the appliance for a given remote host 
(the default bounce profile is set via the Network > Bounce Profiles page).

You can also control the default settings for unspecified domains.

Unless you specify the output interface via the 

deliveryconfig

 command or via 

a message filter (

alt-src-host

), or through the use of a virtual gateway, the 

output interface is selected by the AsyncOS routing table. Basically, selecting 
“auto” means to let AsyncOS decide.

In greater detail: local addresses are identified by applying the interface netmask 
to the interface IP address. Both of these are set via the Network > Interfaces page 
or by the 

interfaceconfig

 command (or during system setup). If the address 

space overlaps, the most specific netmask is used. If a destination is local, packets 
are sent via the appropriate local interface.

If the destination is not local, packets are sent to the default router (set via the 
Network > Routing page or with the 

setgateway

 command). The IP address of the 

default router is local. The output interface is determined by the rule for selecting 
the output interface for local addresses. For example, AsyncOS chooses the most 
specific IP address and netmask that include the default router's IP address.

The routing table is configured via the Network > Routing page (or via the 

routeconfig

 command). A matching entry in the routing table takes precedence 

over the default route. A more specific route take precedence over a less specific 
route.

Each outbound destination domain has its own outbound queue. Therefore, each 
domain has a separate set of concurrency limits as specified in the Destination 
Controls table. Further, each unique domain not listed specifically in the 
Destination Controls table uses another set of the “Default” limits as set in the 
table.