Cisco Cisco Email Security Appliance C170 Guia Do Utilizador

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Cisco AsyncOS 8.0.1 for Email User Guide
 
Chapter 4      Understanding the Email Pipeline
  Delivery
Messages released from quarantines are re-scanned for viruses.
See the “Quarantines” chapter of the Cisco IronPort AsyncOS for Email Daily Management Guide for 
more information. 
Delivery
The delivery phase of the Email Pipeline focuses on the final phase of email processing, including 
limiting connections, bounces, and recipients.
Virtual gateways
The Cisco Virtual Gateway technology enables users to separate the Cisco appliance into multiple 
Virtual Gateway addresses from which to send and receive email. Each Virtual Gateway address is given 
a distinct IP address, hostname and domain, and email delivery queue.
For more information, see “Using Virtual Gateway™ Technology” in the “Configuring Routing and 
Delivery Features” chapter of the Cisco IronPort AsyncOS for Email Advanced Configuration Guide.
Delivery Limits
Use the 
deliveryconfig
 command to set limits on delivery, based on which IP interface to use when 
delivering and the maximum number of concurrent connections the appliance makes for outbound 
message delivery. 
For more information, see “Set Email Delivery Parameters” in the “Configuring Routing and Delivery 
Features” chapter of the Cisco IronPort AsyncOS for Email Advanced Configuration Guide.
Domain-Based Limits
For each domain, you can assign a maximum number of connections and recipients that will never be 
exceeded by the system in a given time period. This “good neighbor” table is defined through the Mail 
Policies > Destination Controls page (or the 
destconfig
 command).
For more information, see “Controlling Email Delivery” in the “Configuring Routing and Delivery 
Features” chapter in the Cisco IronPort AsyncOS for Email Advanced Configuration Guide.
Domain-Based Routing
Use the Network > SMTP Routes page (or the 
smtproutes
 command) to redirect all email for a particular 
domain to a specific mail exchange (MX) host, without rewriting the envelope recipient.
For more information, see “Routing Email for Local Domains” in the “Configuring Routing and 
Delivery Features” chapter of the Cisco IronPort AsyncOS for Email Advanced Configuration Guide.