Cisco Cisco Email Security Appliance C190 Guía Del Usuario
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Cisco AsyncOS 8.5.6 for Email User Guide
Chapter 23 Configuring Routing and Delivery Features
Review: Email Pipeline
* These features can send messages to special queues called Quarantines.
Table 23-12
Email Pipeline for the Email Security Appliance: Routing and Delivery Features
W
o
rk Queue
LDAP Recipient Acceptance
LDAP validation for recipient acceptance occurs within the work queue. If the
recipient is not found in the LDAP directory, the message is dropped or
bounced. LDAP validation can be configured to occur within the SMTP
conversation instead.
recipient is not found in the LDAP directory, the message is dropped or
bounced. LDAP validation can be configured to occur within the SMTP
conversation instead.
Masquerading
or LDAP Masquerading
Masquerading occurs in the work queue; it rewrites the Envelope Sender, To:,
From:, and/or CC: headers, from a static table or via an LDAP query.
From:, and/or CC: headers, from a static table or via an LDAP query.
LDAP Routing
LDAP queries are performed for message routing or address rewriting. Group
LDAP queries work in conjunction with message filter rules
LDAP queries work in conjunction with message filter rules
mail-from-group
and
rcpt-to-group
.
Message Filters*
Message Filters are applied prior to message “splintering.” * Can send
messages to quarantines.
messages to quarantines.
Anti-Spam**
Per Recipient
Scann
ing
Anti-spam scanning engine examines messages and returns a verdict for
further processing.
further processing.
Anti-Virus*
Anti-Virus scanning examines messages for viruses. Messages are scanned
and optionally repaired, if possible. * Can send messages to quarantines.
and optionally repaired, if possible. * Can send messages to quarantines.
Advanced Malware Protection
Advanced Malware Protection performs file reputation scanning and file
analysis, in order to detect malware in attachments.
analysis, in order to detect malware in attachments.
Content Filters*
Content Filters are applied. * Can send messages to quarantines.
Outbreak Filters*
The Outbreak Filters feature helps protect against virus outbreaks. * Can send
messages to quarantines.
messages to quarantines.
Virtual gateways
Sends mail over particular IP interfaces or groups of IP interfaces.
Delivery limits
1. Sets the default delivery interface.
2. Sets the total maximum number of outbound connections.
Domain-based Limits
Defines, per-domain: maximum outbound connections for each virtual
gateway and for the entire system; the bounce profile to use; the TLS
preference for delivery: no/preferred/required
gateway and for the entire system; the bounce profile to use; the TLS
preference for delivery: no/preferred/required
Domain-based routing
Routes mail based on domain without rewriting Envelope Recipient.
Global unsubscribe
Drops recipients according to specific list (configured system-wide).
Bounce profiles
Undeliverable message handling. Configurable per listener, per Destination
Controls entry, and via message filters.
Controls entry, and via message filters.