Irrelevant/Obsolete Tickets not to be shown in Reports

Hi,

Is there a way to filter Irrelevant or Obsolete tickets in C4C Reporting? The requirement is to generate a report for all Email cases received in C4C, however using "All Tickets with All Interactions" data source there is no field that I can use as a filter to exclude all Irrelevant tickets. Appreciate if anyone can provide some idea.

Thanks.

Geoffrey Arado