Cisco Cisco Web Security Appliance S360 Troubleshooting Guide
SenderBase Frequently Asked Questions
Document ID: 118409
Contributed by Chris Haag and Enrico Werner, Cisco TAC Engineers.
Oct 13, 2014
Contents
Introduction
What is SenderBase?
Frequently Asked Questions
What is SenderBase?
Frequently Asked Questions
Introduction
This document describes frequently asked questions about SenderBase.
What is SenderBase?
The SenderBase Reputation Service (SBRS) provides an accurate, flexible way for you to reject or throttle
systems suspected to be transmitting spam based on the "reputation" of the connecting IP address associated
with the remote host. The SBRS returns a score based on the probability that a message from a given source
is spam, ranging from −10 (certain to be spam) through 0 to +10 (certain not to be spam). Although SBRS
can be used as a stand−alone anti−spam solution, it is most effective when combined with a content−based
anti−spam scanner, such as Cisco Anti−Spam.
systems suspected to be transmitting spam based on the "reputation" of the connecting IP address associated
with the remote host. The SBRS returns a score based on the probability that a message from a given source
is spam, ranging from −10 (certain to be spam) through 0 to +10 (certain not to be spam). Although SBRS
can be used as a stand−alone anti−spam solution, it is most effective when combined with a content−based
anti−spam scanner, such as Cisco Anti−Spam.
Frequently Asked Questions
How does SenderBase work?
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How do I use SenderBase?
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How are SBRS scores determined and what do they mean?
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What are the best practices for using SenderBase?
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Is SenderBase on the ESA another DNS RBL?
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What types of blacklists are used by SenderBase?
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Does SenderBase function correctly behind NAT?
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What does the SBRS value of 'none' mean?
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Why does the sending IP address of my ESA has a low SBRS and how can this be fixed?
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What data is sent to SenderBase and how can this be disabled?
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How do I modify the subject header to flag messages that have a low SBRS?
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Updated: Oct 13, 2014
Document ID: 118409