Cisco Cisco Email Security Appliance X1050 Guía Del Usuario
Chapter 3 Configuring Routing and Delivery Features
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Cisco IronPort AsyncOS 7.3 for Email Advanced Configuration Guide
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If you are using Virtual Gateway technology, information about each Virtual
Gateway address is also displayed. The command requires you to input the
domain of the host information to be returned. DNS information stored in the
AsyncOS cache and the last error returned from the recipient host is also given.
Data returned is cumulative since the last
Gateway address is also displayed. The command requires you to input the
domain of the host information to be returned. DNS information stored in the
AsyncOS cache and the last error returned from the recipient host is also given.
Data returned is cumulative since the last
resetcounters
command.
The statistics returned are grouped into two categories: counters and gauges. In
addition, other data returned include: last activity, MX records, and last 5XX
error.
addition, other data returned include: last activity, MX records, and last 5XX
error.
Managing Delivery Connections per Virtual Gateway Address
Certain system parameters require settings at the system and Virtual Gateway
address levels.
address levels.
For example, some recipient ISPs limit the number of connections they allow for
each client host. Therefore, it is important to manage relationships with the ISPs,
especially when email is being delivered over multiple Virtual Gateway addresses.
each client host. Therefore, it is important to manage relationships with the ISPs,
especially when email is being delivered over multiple Virtual Gateway addresses.
See
for information about the
destconfig
command and how Virtual Gateway addresses are affected.
When you create a “group,” of Virtual Gateway addresses, the good neighbor table
settings for Virtual Gateway are applied to the group, even if the group consists
of 254 IP addresses.
settings for Virtual Gateway are applied to the group, even if the group consists
of 254 IP addresses.
For example, suppose you have created group of 254 outbound IP addresses set
up as a group to cycle through in a “round-robin” fashion, and suppose the good
neighbor table for
up as a group to cycle through in a “round-robin” fashion, and suppose the good
neighbor table for
small-isp.com
is 100 simultaneous connections for the system
and 10 connections for Virtual Gateway addresses. This configuration will never
open more than 10 connections total for all 254 IP addresses in that group; the
group is treated as a single Virtual Gateway address.
open more than 10 connections total for all 254 IP addresses in that group; the
group is treated as a single Virtual Gateway address.
Using Global Unsubscribe
To ensure that specific recipients, recipient domains, or IP addresses never receive
messages from the Cisco IronPort appliance, use the IronPort AsyncOS Global
Unsubscribe feature. The
messages from the Cisco IronPort appliance, use the IronPort AsyncOS Global
Unsubscribe feature. The
unsubscribe
command allows you to add and delete
addresses to a global unsubscribe list, as well as enable and disable the feature.
AsyncOS checks all recipient addresses against a list of “globally unsubscribed”
AsyncOS checks all recipient addresses against a list of “globally unsubscribed”