[asterisk-users] voicemail

[Danny Nicholas]

>From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of mattias
>Subject: [asterisk-users] voicemail

* paraphrasing OP *
Can I add these functions to voicemail?
Some companies have the ability to press 6 to call back the people who have
left a message
Or 
When a people leave a message, Press 3 to mark the message

My answer would be that you can do either or both of these.

I would recommend posting a bounty if it's something you really want and/or
can't figure out.