Cisco Cisco Email Security Appliance C170 Guia Do Utilizador
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Cisco IronPort AsyncOS 7.6 for Email Configuration Guide
OL-25136-01
Chapter 5 Configuring the Gateway to Receive Email
Note
When you add a domain to the Recipient Access Table in step 4 of the System Setup Wizard in the GUI
(see
(see
), you might want to consider adding a second entry to specify
subdomains. For example, if you type the domain
example.net
, you might also want to enter
.example.net
. The second entry ensures that mail destined for any subdomain of
example.net
will
match in the Recipient Access Table. Note that only specifying
.example.com
in the RAT will accept for
all subdomains of
.example.com
but will not accept mail for complete email address recipients without
a subdomain (for example joe@example.com).
Bypassing Throttling for Special Recipients
For recipient entries, you can specify that the recipient bypasses throttling control mechanisms enabled
on the listener.
on the listener.
This feature is useful if there are certain recipients for whom you do not want to limit messages. For
example, many users will want to receive email for the address “
example, many users will want to receive email for the address “
postmaster@domain
” on a listener, even
if the sending domain is being throttled based on the receiving control defined in mail flow policies.
Specifying this recipient to bypass receiving control in a listener’s RAT allows the listener to receive
unlimited messages for the recipient “
Specifying this recipient to bypass receiving control in a listener’s RAT allows the listener to receive
unlimited messages for the recipient “
postmaster@domain
” while retaining mail flow policies for other
recipients in the same domain. Recipients will avoid being counted against the recipients-per-hour
counter maintained by the system if the sending domain is being limited.
counter maintained by the system if the sending domain is being limited.
To specify certain recipients to bypass receiving control via the GUI, select “Yes” for Bypass Receiving
Control when adding or editing a RAT entry:
Control when adding or editing a RAT entry:
Figure 5-37
Bypassing Receiving Control
To specify certain recipients to bypass receiving control via the CLI, answer yes to the following
question when you enter recipients using the
question when you enter recipients using the
listenerconfig -> edit -> rcptaccess
command:
Bypassing LDAP Accept for Special Recipients
If you configure LDAP acceptance queries, you may wish to bypass the acceptance query for certain
recipients. This feature can be useful if there are recipients for whom you receive email which you do
not want to be delayed or queued during LDAP queries, such as
recipients. This feature can be useful if there are recipients for whom you receive email which you do
not want to be delayed or queued during LDAP queries, such as
customercare@example.com
.
user@
Anything with the given username.
user@[IP_address]
Username at a specific IPv4 or IPv6 address. Note that the IP
address must be between the “
address must be between the “
[]
” characters.
Note that “
user@
IP_address” (without the bracket characters) is
not a valid address. The system will append the brackets when it
receives the message to create a valid address, which could affect
whether a recipient is matched in the RAT.
receives the message to create a valid address, which could affect
whether a recipient is matched in the RAT.
Would you like to bypass receiving control for this entry? [N]> y