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Great addon! Wonder if there is a way to set it as the Start Page. That will be very useful.

Questa recensione riguarda una versione precedente (2.0) del componente aggiuntivo. 

This add-on replaces the start page, so yes, it's possible (in fact, it's mandatory). If that's not happening for you, please file a bug here: https://bitbucket.org/squib/mail-summaries/issues/new