title: How can I maake MBOX files (Unix-style email archives) searchable via Spotlight in Mac OS X?
body: <p>I have a tons of Unix-style mbox e-mail files accumulated for more
  than ten years, used with MH and other Unix-based mail readers.</p>
  
  <p>Is there any way to let MacOS Spotlight to recognize
  these Unix-style mail files (their filenames just consist of numbers,
  without filename extension, and its contents are MIME encoded)?</p>
  
  <p>I want these mail files searchable with 'mdfind' command and
  metadata such as "kMDItemAuthorEmailAddresses", without modifying
  their file names.</p>
  
  <p>Thanks!</p>