if I search my outlook 2013 inbox for "from:(curtiss)", the results will include emails from "Curtiss, John" and "John Curtiss" but not fromjohncurtiss@[InsertFreeEmailDomain].com.
same thing if I search for "from:(*curtiss*)".
if I search for "from:([InsertFreeEmailDomain])", or even "from:"@([Insert)" it does return results from johncurtiss@[InsertFreeEmailDomain].com