Cisco Cisco Email Security Appliance C160 Mode D'Emploi

 provide an overview of how email is routed through the 

system, from reception to routing to deliver. Each feature is processed in order 
(from top to bottom) and is briefly summarized. Shaded areas in 

represent processing that occurs in the Work Queue. 

You can test most of the configurations of features in this pipeline using the 

trace

 

command. For more information, see “Debugging Mail Flow Using Test 
Messages: Trace” in the Cisco IronPort AsyncOS for Email Daily Management 
Guide.

For outgoing mail, RSA Email Data Loss Prevention scanning takes place after 
the Outbreak Filters stage.

ACCEPT, REJECT, RELAY, or TCPREFUSE 
connections

Maximum outbound connections

Maximum concurrent inbound connections per IP address

Maximum message size and messages per connection

Maximum recipients per message and per hour

TCP listen queue size

TLS: no/preferred/required

SMTP AUTH: no/preferred/required

Drop email with malformed FROM headers

Always accept or reject mail from entries in the Sender 
Verification Exception Table.

SenderBase on/off (IP profiling/flow control) 

Adds a received header to accepted email: on/off.

Adds default domain for “bare” user addresses.