MP3 spam is on the way , if you haven’t gotten it already. Follow the link for an example of what the recording sounds like.
I’ve already gotten a couple reports from users at work of a strange MP3 file arriving in their inbox, and gotten a couple myself. While this doesn’t seem quite as prevalent as the earlier PDF spam outbreak this year, it does show that the spammers are trying another trick to get around the filters companies have in place.
In this case, the audio file is of a distorted British text to speech recording which is pumping the stock of some Canadian auto parts company. Since MP3s may be legitimate attachments in some cases, I’d recommend setting your email filter to quarantine incoming MP3s and not outright block them.