Press ctrl + K to use the global search a free form query that opens a faceted search tab where you can fine tune the results. Press ctrl+Shift+K to use the quicksearch. again free form, but allows options to search only send or body of mail. The limitation is it searches only the current folder. Press Ctrl+Shift+f to use the oringinal search. Offer a less free form way to search. Still around because you can save the search a a virtual folder and come back to it anytime.