Cisco Cisco Email Security Appliance X1070 用户指南
4-11
User Guide for AsyncOS 10.0 for Cisco Email Security Appliances
Chapter 4 Understanding the Email Pipeline
Delivery
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Virtual gateways
The Virtual Gateway technology enables users to separate the 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.
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
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.
message delivery.
For more information, see
.
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
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
.
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
.
Global Unsubscribe
Use Global Unsubscribe to ensure that specific recipients, recipient domains, or IP addresses never
receive messages from the appliance. If Global Unsubscribe is enabled, the system will check all
recipient addresses against a list of “globally unsubscribed” users, domains, email addresses, and IP
Addresses. Matching emails are not sent.
receive messages from the appliance. If Global Unsubscribe is enabled, the system will check all
recipient addresses against a list of “globally unsubscribed” users, domains, email addresses, and IP
Addresses. Matching emails are not sent.
For more information, see
.