As voicemails arrive in your email Inbox, use any mp3 player to play them. When you click to open the voicemail mp3 attachment, your computer will probably select a player for you.
Examples of some common mp3 players are Windows Media Player, Real Player, and iTunes.
You can keep a message in your email for as long as you need.
Note: If you delete an emailed voicemail message accidentally, Yahoo! cannot provide a duplicate copy of your message.