User Guide

5-12
AsyncOS 9.1.2 for Cisco Email Security Appliances User Guide
Chapter 5 Configuring the Gateway to Receive Email
Listening for Connection Requests by Creating a Listener via the GUI
For more information about creating LDAP queries, see LDAP Queries, page 25-1.
Step 7 Submit and commit your changes.
Related Topics
• Partial Domains, Default Domains, and Malformed MAIL FROMs, page 5-12
Partial Domains, Default Domains, and Malformed MAIL FROMs
If you enable envelope sender verification or disable allowing partial domains in SMTP Address Parsing
options for a listener, the default domain settings for that listener will no longer be used.
These features are mutually exclusive.
Query Type Description
Accept Queries For Accept queries, select the query to use from the list. You can specify
whether the LDAP Accept occurs during the work queue processing or
during the SMTP conversation.
For LDAP Accept during the work queue processing, specify the behavior
for non-matching recipients: bounce or drop.
For LDAP Accept during the SMTP conversation, specify how to handle
mail if the LDAP server is unreachable. You can elect to allow messages or
drop the connection with a code and custom response. Finally, select
whether or not to drop connections if the Directory Harvest Attack
Prevention (DHAP) threshold is reached during an SMTP conversation.
Performing recipient validation in the SMTP conversation can potentially
reduce the latency between multiple LDAP queries. Therefore, you might
notice an increased load on your directory server when you enable
conversational LDAP Accept.
See Overview of LDAP Queries, page 25-1 for more information.
Routing Queries For routing queries, select the query from the list. See Overview of LDAP
Queries, page 25-1 for more information.
Masquerade Queries For masquerade queries, select a query from the list, and select which
address to masquerade, such as the From or CC header addresses.
See Overview of LDAP Queries, page 25-1 for more information.
Group Queries For group queries, select the query from the list. See Overview of LDAP
Queries, page 25-1 for more information.