Cisco Cisco Email Security Appliance C170 사용자 가이드
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Cisco IronPort AsyncOS 7.5 for Email Configuration Guide
OL-25136-01
Chapter 1 Getting Started with the Cisco IronPort Email Security Appliance
perform other actions needed to upgrade an appliance. For more information on
user accounts, see the “Common Administrative Tasks” chapter in the Cisco
IronPort AsyncOS for Email Daily Management Guide.
user accounts, see the “Common Administrative Tasks” chapter in the Cisco
IronPort AsyncOS for Email Daily Management Guide.
Enhancement: Administrator Role
Starting in AsyncOS 7.5, administrators can perform system upgrades, create
clusters, and join appliances to existing clusters.
clusters, and join appliances to existing clusters.
Enhancement: Large Message Scanning
AsyncOS 7.5 improves how anti-spam scanning handles large messages in order
to optimize the throughput of your Email Security appliance while still being able
to scan the increasingly larger messages sent by spammers. You can define an
always scan message size, where messages smaller than the defined size are
completely scanned by Cisco IronPort Anti-Spam engine, delivering Cisco
IronPort’s industry-leading level of efficacy, and a never scan message size,
where messages larger than the defined size are not scanned. For messages larger
than the always scan size and smaller than the never scan size, the anti-spam
engine performs a limited and faster scan.
to optimize the throughput of your Email Security appliance while still being able
to scan the increasingly larger messages sent by spammers. You can define an
always scan message size, where messages smaller than the defined size are
completely scanned by Cisco IronPort Anti-Spam engine, delivering Cisco
IronPort’s industry-leading level of efficacy, and a never scan message size,
where messages larger than the defined size are not scanned. For messages larger
than the always scan size and smaller than the never scan size, the anti-spam
engine performs a limited and faster scan.
For more information, see
New Feature: SMTP Call Ahead
AsyncOS 7.5 includes SMTP call-ahead recipient validation, which allows the
Email Security appliance to perform recipient validation by querying an external
SMTP server prior to accepting incoming mail for the recipient. SMTP call-ahead
recipient validation is useful in cases where you might want to validate users but
cannot use LDAP Accept or the Recipient Access Table (RAT) for recipient
validation.
Email Security appliance to perform recipient validation by querying an external
SMTP server prior to accepting incoming mail for the recipient. SMTP call-ahead
recipient validation is useful in cases where you might want to validate users but
cannot use LDAP Accept or the Recipient Access Table (RAT) for recipient
validation.
For more information, see the “SMTP Call Ahead” chapter in the Cisco IronPort
AsyncOS for Email Advanced Configuration Guide.
AsyncOS for Email Advanced Configuration Guide.