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	<title>&#45; CircleID</title>
	<link>https://www.circleid.com/blogs/</link>
	<description>Postings from  on CircleID</description>
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	<dc:rights>Copyright 2026, unless where otherwise noted.</dc:rights>
	<dc:date>2026-03-31T21:29:00+00:00</dc:date>

	
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		<title> Google as a Real-time Blackhole List (Featured Blog)</title>
		<guid isPermaLink="true">https://circleid.com/posts811010_google_as_real_time_blackhole_list</guid>
		<link>https://circleid.com/posts811010_google_as_real_time_blackhole_list</link>
		<description><![CDATA[For those not familiar with RBL, the term means Real-time Blackhole List, it is mainly used for SPAM fighting. I have recently started playing around with Google as an RBL engine, the idea is that if the search term I use hits too many hits it is likely to be SPAM. The danger of course is that the term could be simply popular -- but the trick here is that I'm using something very special as the search term -- the <em>IP address</em> of the poster. <a href="https://circleid.com/posts811010_google_as_real_time_blackhole_list">More...</a>]]></description>
		<dc:date>2026-03-31T14:29:00-07:00</dc:date>
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