http://www.macmania.at/tippsundtricks/machelp-apple-mail-suche-funktioniert-nicht/ http://www.macissues.com/2014/12/12/how-to-determine-when-your-spotlight-index-needs-to-be-rebuilt/ http://osxdaily.com/2007/02/15/spotlight-wont-work-fix-a-broken-spotlight-menu-with-these-troubleshooting-tips/ http://www.computerworld.com/article/2476217/mac-os-x/how-to-fix-apple-mail-by-rebuilding-and-reindexing-the-mailbox.html