Mail won't open anymore OS X El Capitan 10.11.5 I cannot get Mail to open everytime I accidentally try to open it it takes forever and never actually opens and then asks if I want to reindex or just reopen - I have tried both options with no results.  I usually have to force quit it as it just freezes everything.  Anyone got any ideas?
OK I finally figured out how to fix it (yay).

I followed this http://c-command.com/spamsieve/help/how-can-i-rebuild-apple to delete the current index which then let me into Mail (finally) and get all my old emails back.  I am so happy to have it back. :-) Thanks for trying to help me!