Voicemail eMail Format


Is it possible (short of using ExternNotify and writing my own email notification script) to have Asterisk send voicemail in MP3 format (i.e. is there a way of running sox or similar after the voicemail is recorded but before it is emailed to change the format of the file)

I’m trying to listen to my voicemail messages on a mobile device that doesnt support .gsm or wav49 files… but MP3 should work fine (as will WAV, but downloading WAV voicemails over a cellphone network is not a pleasant experience)