Cisco Cisco Email Security Appliance C650 Guía Del Usuario
4-8
Cisco AsyncOS 8.0.2 for Email User Guide
Chapter 4 Understanding the Email Pipeline
Work Queue / Routing
For more information about masquerading via an LDAP query, see the “LDAP Queries” chapter in the
Cisco IronPort AsyncOS for Email Advanced Configuration Guide.
Cisco IronPort AsyncOS for Email Advanced Configuration Guide.
LDAP Routing
You can configure your Cisco appliance to route messages to the appropriate address and/or mail host
based upon the information available in LDAP directories on your network.
based upon the information available in LDAP directories on your network.
For more information, see “LDAP Queries” in the Cisco IronPort AsyncOS for Email Advanced
Configuration Guide.
Configuration Guide.
Message Filters
Message filters allow you to create special rules describing how to handle messages and attachments as
they are received. Filter rules identify messages based on message or attachment content, information
about the network, message envelope, message headers, or message body. Filter actions allow messages
to be dropped, bounced, archived, quarantined, blind carbon copied, or altered.
they are received. Filter rules identify messages based on message or attachment content, information
about the network, message envelope, message headers, or message body. Filter actions allow messages
to be dropped, bounced, archived, quarantined, blind carbon copied, or altered.
For more information, see the “Using Message Filters to Enforce Email Policies” chapter in the Cisco
IronPort AsyncOS for Email Advanced Configuration Guide.
IronPort AsyncOS for Email Advanced Configuration Guide.
Multi-recipient messages are “splintered” after this phase, prior to Email Security Manager. Splintering
messages refers to creating splinter copies of emails with single recipients, for processing via Email
Security Manager.
messages refers to creating splinter copies of emails with single recipients, for processing via Email
Security Manager.
Email Security Manager (Per-Recipient Scanning)
Safelist/Blocklist Scanning
End user safelists and blocklists are created by end users and stored in a database that is checked prior
to anti-spam scanning. Each end user can identify domains, sub domains or email addresses that they
wish to always treat as spam or never treat as spam. If a sender address is part of an end users safelist,
anti-spam scanning is skipped, and if the sender address is listed in the blocklist, the message may be
quarantined or dropped depending on administrator settings. For more information about configuring
safelists and blocklists, see the “Quarantines” chapter in the Cisco IronPort AsyncOS for Email Daily
Management Guide.
to anti-spam scanning. Each end user can identify domains, sub domains or email addresses that they
wish to always treat as spam or never treat as spam. If a sender address is part of an end users safelist,
anti-spam scanning is skipped, and if the sender address is listed in the blocklist, the message may be
quarantined or dropped depending on administrator settings. For more information about configuring
safelists and blocklists, see the “Quarantines” chapter in the Cisco IronPort AsyncOS for Email Daily
Management Guide.
Anti-Spam
The Anti-Spam feature involves Cisco Anti-Spam scanning. Anti-spam scanning offers complete,
Internet-wide, server-side anti-spam protection. It actively identifies and defuses spam attacks before
they inconvenience your users and overwhelm or damage your network, allowing you to remove
unwanted mail before it reaches your users’ inboxes, without violating their privacy.
Internet-wide, server-side anti-spam protection. It actively identifies and defuses spam attacks before
they inconvenience your users and overwhelm or damage your network, allowing you to remove
unwanted mail before it reaches your users’ inboxes, without violating their privacy.
Anti-spam scanning can be configured to deliver mail to the Cisco Spam Quarantine (either on- or
off-box). Messages released from the Cisco Spam Quarantine proceed directly to the destination queue,
skipping any further work queue processing in the email pipeline.
off-box). Messages released from the Cisco Spam Quarantine proceed directly to the destination queue,
skipping any further work queue processing in the email pipeline.
See
for more information.