IT Manager

Steve Hood

IT Professional, Freelance Journalist, Certified Editor

Andrew Leniart

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Hi , our public UP is being blacklisted by CBL. <br />
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Reason given: This IP is infected (or NATting for a computer that is infected) with an botnet that is emitting email spam. The infection is probably sendsafe.<br />
<br />
I'm assuming that one o the 25 or so computers in my network is infected.<br />
<br />
Question: Is there a way usnijg the Sonicwall to determine in a machine is acting as an SMTP server and sending out spam email?<br />
<br />
My SonicWall is a new model NSA 2600 with updated SonicOC
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Hi , our public UP is being blacklisted by CBL. 

Reason given: This IP is infected (or NATting for a computer that is infected) with an botnet that is emitting email spam. The infection is probably sendsafe.

I'm assuming that one o the 25 or so computers in my network is infected.

Question: Is there a way usnijg the Sonicwall to determine in a machine is acting as an SMTP server and sending out spam email?

My SonicWall is a new model NSA 2600 with updated SonicOC

IP Blacklisted, a computer on network is infected and emitting email spam.

Various techniques are used to prevent email spam (unsolicited bulk email). No technique is a complete solution to the spam problem, and each has trade-offs between incorrectly rejecting legitimate email (false positives) vs. not rejecting all spam (false negatives) - and the associated costs in time and effort. Anti-spam techniques can be broken into four broad categories: those that require actions by individuals, those that can be automated by email administrators, those that can be automated by email senders and those employed by researchers and law enforcement officials.