Cisco Cisco Email Security Appliance X1050 Guía Del Usuario
24-8
AsyncOS 9.1.2 for Cisco Email Security Appliances User Guide
Chapter 24 Configuring Routing and Delivery Features
Creating Alias Tables
A domain context is a list of one or more domains or partial domains, separated by commas and enclosed
in square brackets ('
in square brackets ('
[
' and '
]
'). A domain is a string containing letters, digits hyphens, and periods as
defined in RFC 1035, section 2.3.1., “Preferred name syntax.” A partial domain, such as
.example.com
is a domain that begins with a period. All domains that end with a substring matching the partial domain
are considered a match. For example, the domain context
are considered a match. For example, the domain context
.example.com
would match
mars.example.com
and
venus.example.com
. Below the domain context is a list of maps, which are
aliases followed by a list of recipients. A map is constructed as follows:
An alias in the left-hand side can contain the following formats:
You can enter multiple aliases, separated by commas on a single left-hand side line.
Each recipient in the right-hand side can be a full
user@domain
email address, or another alias.
An alias file can contain “global” aliases (aliases that are applied globally instead of to a specific
domain) with no implied domain, domain contexts within which aliases have one or more implied
domains, or both.
domain) with no implied domain, domain contexts within which aliases have one or more implied
domains, or both.
“Chains” (or recursive entries) of aliases may be created, but they must end in a full email address.
A special destination of
/dev/null
is supported to drop the message in order to be compatible with
context of a sendmail configuration. If a message is mapped to
/dev/null
via an alias table, the dropped counter is increased. (See the “Managing and Monitoring via
the CLI” chapter.) The recipient is accepted but not enqueued.
Related Topics
•
•
Exporting and Importing an Alias Table
To import an alias table, first see
to ensure that you can
access the appliance.
Use the
export
subcommand of the
aliasconfig
command to save any existing alias table. A file (whose
name you specify) will be written to the
/configuration
directory for the listener. You can modify this
file outside of the CLI and then re-import it. (If you have malformed entries in the file, errors are printed
when you try to import the file.)
when you try to import the file.)
Place the alias table file in the
/configuration
directory, and then use the
import
subcommand of the
aliasconfig
command to upload the file.
Comment out lines in the table using a number symbol (#) at the beginning of each line.
Table 24-2
Alias Table Syntax
Left-hand Side (LHS)
Separator
Right-hand Side (RHS)
a list of one or more aliases to match
the colon character
(“
(“
:
”)
a list of one or more recipient
addresses or aliases
addresses or aliases
username
Specifies an alias to match. There must be a preceding “domains” attribute
specified in the table. The lack of this parameter will produce an error.
specified in the table. The lack of this parameter will produce an error.
user@domain
Specifies an exact email address to match on.