Cisco Cisco Email Security Appliance C170 Guia Do Utilizador
C H A P T E R
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Cisco AsyncOS 9.5 for Email User Guide
6
Sender Reputation Filtering
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Overview of Sender Reputation Filtering
Sender reputation filtering is the first layer of spam protection, allowing you to control the messages that
come through the email gateway based on senders’ trustworthiness as determined by the Cisco
SenderBase™ Reputation Service.
come through the email gateway based on senders’ trustworthiness as determined by the Cisco
SenderBase™ Reputation Service.
The appliance can accept messages from known or highly reputable senders — such as customers and
partners — and deliver them directly to the end user without any content scanning. Messages from
unknown or less reputable senders can be subjected to content scanning, such as anti-spam and anti-virus
scanning, and you can also throttle the number of messages you are willing to accept from each sender.
Email senders with the worst reputation can have their connections rejected or their messages bounced
based on your preferences.
partners — and deliver them directly to the end user without any content scanning. Messages from
unknown or less reputable senders can be subjected to content scanning, such as anti-spam and anti-virus
scanning, and you can also throttle the number of messages you are willing to accept from each sender.
Email senders with the worst reputation can have their connections rejected or their messages bounced
based on your preferences.
Note
File reputation filtering is a separate service. For information, see
SenderBase Reputation Service
The Cisco SenderBase Reputation Service, using global data from the SenderBase Affiliate network,
assigns a SenderBase Reputation Score to email senders based on complaint rates, message volume
statistics, and data from public blacklists and open proxy lists. The SenderBase Reputation Score helps
to differentiate legitimate senders from spam sources. You can determine the threshold for blocking
messages from senders with low reputation scores.
assigns a SenderBase Reputation Score to email senders based on complaint rates, message volume
statistics, and data from public blacklists and open proxy lists. The SenderBase Reputation Score helps
to differentiate legitimate senders from spam sources. You can determine the threshold for blocking
messages from senders with low reputation scores.
The SenderBase Security Network website (
www.senderbase.org)
provides a global overview of the
latest email and web-based threats, displays current email traffic volume by country, and allows you to
look up reputation scores based on IP address, URI or Domain.
look up reputation scores based on IP address, URI or Domain.