Cisco Cisco Email Security Appliance C160 Mode D'Emploi

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Cisco AsyncOS 8.5.5 for Email Security User Guide
 
Chapter 24      LDAP Queries
  Overview of LDAP Queries
Spam Quarantine Alias Consolidation. If you use email notifications for spam, this query 
consolidates the end-user aliases so that end-users do not receive quarantine notices for each aliased 
email address. For more information, see 
User Distinguished Name. If you use RSA Enterprise Manager for data loss prevention (DLP), this 
query retrieves the distinguished name for senders of messages that may contain DLP violations. 
The Email Security appliance includes the distinguished name when it sends DLP incident data to 
Enterprise Manager. For more information, see 
Understanding How LDAP Works with AsyncOS
When you work with LDAP directories, the appliance can be used in conjunction with an LDAP 
directory server to accept recipients, route messages, and/or masquerade headers. LDAP group queries 
can also be used in conjunction with message filters to create rules for handling messages as they are 
received by the appliance.
 demonstrates how the appliance works with LDAP:
Figure 24-1
LDAP Configuration
1.
The sending MTA sends a message to the public listener “A” via SMTP. 
2.
The appliance queries the LDAP server defined via the System Administration > LDAP page (or by 
the global 
ldapconfig
 command).
3.
Data is received from the LDAP directory, and, depending on the queries defined on the System 
Administration > LDAP page (or in the 
ldapconfig
 command) that are used by the listener:
the message is routed to the new recipient address, or dropped or bounced
the message is routed to the appropriate mailhost for the new recipient
From:, To:, and CC: message headers are re-written based upon the query
Firewall
Appliance
Sending MTA
Recipient email address (local)
Mailhost information
Mail routing information
Group information 
SMTP AUTH 
2
1
HELO
SMTP
A
3
 
DC=example,DC=com
with LDAP enabled