Cisco Cisco Email Security Appliance C160 Guía Del Usuario
39-5
Cisco AsyncOS 8.5 for Email User Guide
Chapter 39 Optimizing the Appliance for Outbound Mail Delivery Using D-Mode
Sending Bulk Mail Using IronPort Mail Merge (IPMM)
Benefits of the Mail Merge Function
•
Ease of use for the mail administrator. The complexities of creating personalized messages for each
recipient are removed, as IPMM provides variable substitution and an abstracted interface in many
common languages.
recipient are removed, as IPMM provides variable substitution and an abstracted interface in many
common languages.
•
Reduced load on message generation systems. By requiring one copy of the message body and a
table of required substitutions, most of the message generation “work” is off-loaded from message
generation systems and moved to the appliance that is configured for optimized outbound mail
delivery.
table of required substitutions, most of the message generation “work” is off-loaded from message
generation systems and moved to the appliance that is configured for optimized outbound mail
delivery.
•
Increased delivery throughput. By reducing the resources necessary to accept and queue thousands
of incoming messages, the appliance can significantly increase out-bound delivery performance.
of incoming messages, the appliance can significantly increase out-bound delivery performance.
•
Queue storage efficiency. By storing less information for each message recipient, users can achieve
orders-of- magnitude, better use of queue storage on the D-Mode enabled appliance.
orders-of- magnitude, better use of queue storage on the D-Mode enabled appliance.
Using Mail Merge
SMTP Injection
IPMM extends SMTP as the transport protocol. There is no special configuration that needs to be made
to the appliance. (By default, IPMM can be enabled for private listeners and disabled for public listeners
on the D-Mode-enabled appliance.) However, if you are not currently using SMTP as your injection
protocol, you must create a new private listener that utilizes SMTP through the D-Mode enabled
appliance interface.
to the appliance. (By default, IPMM can be enabled for private listeners and disabled for public listeners
on the D-Mode-enabled appliance.) However, if you are not currently using SMTP as your injection
protocol, you must create a new private listener that utilizes SMTP through the D-Mode enabled
appliance interface.
Use the
setipmm
subcommand of
listenerconfig
to enable IPMM on the listener. For more
information, see
IPMM modifies SMTP by altering two commands —
MAIL FROM
and
DATA
— and adding another:
XDFN
.
The
MAIL FROM
command is replaced with
XMRG FROM
and, the
DATA
command is replaced with
XPRT
.
To generate a Mail Merge message, the commands used to generate the message need to be issued in a
particular sequence.
particular sequence.
1.
The initial EHLO statement, identifying the sending host.
2.
Each message starts with an XMRG FROM: statement, indicating the sender address.
3.
Each recipient is then defined:
•
One or more XDFN variable allocation statements are made, including defining the parts
(XDFN *PART=1,2,3…), and any other recipient specific variables.
(XDFN *PART=1,2,3…), and any other recipient specific variables.
•
The recipient email address is defined with the RCPT TO: statement. Any variable allocations
prior to the RCPT TO:, but after the prior XMRG FROM, or RCPT TO command, will be
mapped to this recipient email address.
prior to the RCPT TO:, but after the prior XMRG FROM, or RCPT TO command, will be
mapped to this recipient email address.
4.
Each part is defined using the XPRT n command, with each part terminated by a period (.) character
similar to the DATA command. The last part is defined by the XPRT n LAST command.
similar to the DATA command. The last part is defined by the XPRT n LAST command.