exmh (1:2.8.0-6) unstable; urgency=low

  sound disabled in default configuration

  To make exmh provide audio feedback you will have to
  set a "Play command" explicitly. Exmh will run this command
  in the background.

  Earlier versions have shipped with the default sound player command
  "/usr/bin/run-mailcap".

 -- Alexander Zangerl <az@debian.org>  Sun, 01 May 2016 12:04:34 +1000

exmh (1:2.8.0-5) unstable; urgency=low

  sound with sox

  If you want to use sound with exmh, using sox's /usr/bin/play as player
  please ensure that you:
 
  - either select "/usr/bin/play -q" in your exmh preferences,
  - or adjust your /etc/mailcap (via mailcap.order and update-mime) so 
  that /usr/bin/play gets the -q flag.
  
  Sox does not run in the background unless -q is present, but exmh runs the
  sound player command as a background process.

 -- Alexander Zangerl <az@debian.org>  Sat, 06 Sep 2014 11:46:44 +1000