Cisco Cisco Email Security Appliance X1050 Guía Del Usuario
4-9
Cisco AsyncOS 9.5 for Email User Guide
Chapter 4 Understanding the Email Pipeline
Work Queue / Routing
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 “Spam Quarantine” chapter.
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 “Spam Quarantine” chapter.
Anti-Spam
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.
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 Spam Quarantine (either on- or off-box).
Messages released from the Spam Quarantine proceed directly to the destination queue, skipping any
further work queue processing in the email pipeline.
Messages released from the Spam Quarantine proceed directly to the destination queue, skipping any
further work queue processing in the email pipeline.
See
for more information.
Anti-Virus
Your appliance includes integrated virus scanning engines. You can configure the appliance to scan
messages and attachments for viruses on a per-“mail policy” basis. You can configure the appliance to
take actions such as the following when a virus is found:
messages and attachments for viruses on a per-“mail policy” basis. You can configure the appliance to
take actions such as the following when a virus is found:
•
attempt to repair the attachment
•
drop the attachment
•
modify the subject header
•
add an additional X- header
•
send the message to a different address or mailhost
•
archive the message
•
delete the message
Messages released from quarantines (see
) are scanned for viruses. See
for more information about Anti-Virus scanning.
Graymail Detection and Safe Unsubscribing
You can configure the appliance to detect graymail messages and perform secure unsubscribe on behalf
of the end user. Available actions are similar to those for anti-virus scanning.
of the end user. Available actions are similar to those for anti-virus scanning.
For more information, see
File Reputation Scanning and File Analysis
You can configure the appliance to scan message attachments for emerging and targeted threats.
Available actions are similar to those for anti-virus scanning.
Available actions are similar to those for anti-virus scanning.
For more information, see