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Can the SMTP Service on Windows 2003 Server be setup to work with one or more IP blacklist providers? If not, what about Windows 2003 Server in general?

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IIS's internal SMTP component can't do such fancy things; that's the only mail engine in Windows Server 2003, and it's not up to this job.

I'm afraid you'll have to get a mail server in order to do this kind of filtering; if you want to stick with a Microsoft solution, Exchange 2007 can use blacklist providers.

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What about blocking with Windows 2003 in general? Maybe a program that blocks IPs using IPSec rules, feed by blacklist provider? – Josh Sep 15 '09 at 19:13
Windows doesn't have anything of this on its own, you need a third-party solution. – Massimo Sep 15 '09 at 20:06

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