Among the presenters at the TechCrunch 50 conference, was Postbox, a new Mozilla-based desktop email application that brings and innovative approach for managing large inboxes.

There’s still no available download to try but according to the demo and screenshots in Postbox’s web site, it indexes and classifies the complete contents of messages to provide topic based views to make it easier the process of finding attached links, images, documents, and addresses. It also provides integration with online communities and access to web services to aid email composition.

Scott McGregor, former Thunderbird lead engineer who resigned last year around the time it was announced a communications-focused Mozilla subsidiary would be spun off, is one of the founders of this  San Francisco-based startup.