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Postbox 3.03 adds archiving features - BetaNews
http://news.google.com/news/url?sa=t&fd=R&usg=AFQjCNH1WbNgal0NUFSX4vwAy_VADWY0AQ&url=http://betanews.com/2012/03/05/postbox-3-03-adds-archiving-features/