The CUMI API can send the message to "Email mailbox",
but I can't find the command to send VOICE message to "Unity Mailbox" ?
and the .VOICE messasge (.Wav) file is located in a window-based server's hard drive...
Does it have to use combine with the CUTI ?
CUMI is for sending voice messages (.wav files) to Unity Connection mailboxes - not sure what you're talking about with it being intended for email - that's not the case. If you review the documentation at the link I provided it has examples on how to do just that.