User Guide

7-14
AsyncOS 9.1.2 for Cisco Email Security Appliances User Guide
Chapter 7 Defining Which Hosts Are Allowed to Connect Using the Host Access Table (HAT)
Handling Messages from a Group of Senders in the Same Manner
Note If you attempt to enter duplicate entries (identical domain or IP addresses) in a single sender
group, the duplicates are discarded.
Step 14 (Optional) Enter a comment.
Step 15 Submit and commit your changes.
Related Topics
• Editing Sender Reputation Filtering Score Thresholds for a Listener, page 6-5
Adding a Sender to an Existing Sender Group
Procedure
Step 1 From a domain, IP, or network owner profile page, click the Add to Sender Group link.
Step 2 Choose the sender group from the list defined for each listener.
Step 3 Submit and commit your changes.
Note When you add a domain to a sender group, two actual domains are listed in the GUI. For
example, if you were adding the domain
example.net, on the Add to Sender Group page, both
example.net and .example.net are added. The second entry ensures that any host in the
subdomain of
example.net will be added to the sender group. For more information, see Sender
Group Syntax, page 7-4.
Note If one or more of the senders you are adding to a sender group is a duplicate of a sender that is
already present in that sender group, the duplicate senders will not be added and you will see a
confirmation message.
Step 4 Click Save to add the sender and return to the Incoming Mail Overview page.
Related Topics
• Protecting Appliance-Generated Messages From the Spam Filter, page 13-14
• How to Configure the Appliance to Scan Messages for Spam, page 13-2
Rearranging the Order of the Rules to Perform for Incoming Connections
If you add a sender group to a listener, you may need to edit the sender group order.
The HAT is read from top to bottom for each host that attempts to connect to the listener. If a rule
matches a connecting host, the action is taken for that connection immediately.