Cisco Cisco Email Security Appliance C170 Guia Do Utilizador
8-2
Cisco AsyncOS 8.5 for Email User Guide
Chapter 8 Accepting or Rejecting Connections Based on Domain Name or Recipient Address
Accessing the RAT
The Recipient Access Table (RAT) page shows a listing of the entries in the RAT including the order,
default action, and whether or not the entry has been configured to bypass LDAP accept queries.
default action, and whether or not the entry has been configured to bypass LDAP accept queries.
Accessing the RAT
GUI
Step 1
Navigate to Mail Policies > Recipient Access Table (RAT).
CLI
Step 1
Use the
listenerconfig
command with the
edit > rcptaccess > new
subcommands.
Editing the Default RAT Entry
Before you begin
•
Set up a public listener.
•
Plan edits with caution, ensuring you do not create an open relay on the Internet. An open relay
(sometimes called an “insecure relay” or a “third-party” relay) is an SMTP email server that allows
third-party relay of email messages. By processing mail that is neither for — nor from — a local
user, an open relay makes it possible for an unscrupulous sender to route large volumes of spam
through your gateway. By default, the RAT rejects all recipients to prevent creation of an open relay.
(sometimes called an “insecure relay” or a “third-party” relay) is an SMTP email server that allows
third-party relay of email messages. By processing mail that is neither for — nor from — a local
user, an open relay makes it possible for an unscrupulous sender to route large volumes of spam
through your gateway. By default, the RAT rejects all recipients to prevent creation of an open relay.
•
Note that you cannot delete the default entry from the RAT.
Procedure
Step 1
Navigate to Mail Policies > Recipient Access Table (RAT).
Step 2
Click All Other Recipients.
Domains and Users
Modifying the Domains For Which to Accept Messages using the RAT
Use the Mail Policies > Recipient Access Table (RAT) page to configure the local domains and specific
users for which the appliance accepts messages. On this page, you can perform the following tasks:
users for which the appliance accepts messages. On this page, you can perform the following tasks:
•
Add, delete, and modify entries in the RAT.
•
Change the order of the entries.