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Re: Email blacklists blocking campus mail servers
From: Rich Graves <rgraves () CARLETON EDU>
Date: Thu, 4 Apr 2013 12:43:19 -0500

Hotmail, Yahoo, and AOL are particularly good about returning 4xx errors very early in a spam run. Watch for those and 
respond accordingly.

More generally,


SlideShare doesn't seem to show speaker notes. For references see:


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