Cisco Cisco Email Security Appliance C160 Guía Del Usuario
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Cisco IronPort AsyncOS 7.3 for Email Advanced Configuration Guide
OL-23081-01
Chapter 3 Configuring Routing and Delivery Features
Configuring Masquerading
Masquerading is a feature that rewrites the Envelope Sender (also known as the
sender, or
sender, or
MAIL FROM
) and the To:, From:, and/or CC: headers on email processed
by a listener according to a table that you construct. A typical example
implementation of this feature is “Virtual Domains,” which allows you to host
multiple domains from a single site. Another typical implementation is “hiding”
your network infrastructure by “stripping” the subdomains from strings in email
headers. The Masquerading feature is available for both private and public
listeners.
implementation of this feature is “Virtual Domains,” which allows you to host
multiple domains from a single site. Another typical implementation is “hiding”
your network infrastructure by “stripping” the subdomains from strings in email
headers. The Masquerading feature is available for both private and public
listeners.
Note
The Masquerading feature is configured on a per-listener basis, as opposed to the
Alias Tables functionality, which is configured for the entire system.
Alias Tables functionality, which is configured for the entire system.
Note
A listener checks the masquerading table for matches and modifies the recipients
while the message is in the work queue, immediately after LDAP recipient
acceptance queries and before LDAP routing queries. Refer to “Understanding the
Email Pipeline” in the Cisco IronPort AsyncOS for Email Configuration Guide.
while the message is in the work queue, immediately after LDAP recipient
acceptance queries and before LDAP routing queries. Refer to “Understanding the
Email Pipeline” in the Cisco IronPort AsyncOS for Email Configuration Guide.
The Masquerading feature actually rewrites addresses for the Envelope Sender
and the To:, From:, and CC: fields of the email that has been received. You can
specify different masquerading parameters for each listener you create in one of
two ways:
and the To:, From:, and CC: fields of the email that has been received. You can
specify different masquerading parameters for each listener you create in one of
two ways:
Step 1
via a static table of mappings you create, or
Step 2
via an LDAP query.
This section discusses the static table method. The table format is
forward-compatible with the
forward-compatible with the
/etc/mail/genericstable
feature of a sendmail
configuration on some Unix systems. See
for more
information on LDAP masquerading queries.