“…A conversation thread in an email corpus is formally defined as a set of exchanged emails on the same topic among the same group of people by reply or forwarding [1]. Recently, conversation thread detection from email data has been profitably employed in several applications, like discussion search in public mailing lists [2][3][4][5][6], topic detection in email corpora [7], email summarization [8,9], email classification [10,11], question answering [12,13], expert finding [14,15], improvement of user experience in email management [16], visualization [17,18], analysis of information sharing in interactive environments [19] and detection of argument patterns to evaluate the creditability of messages in conversations [20].…”