Details :Mail Outgoing blocked. Reason :Daily Mail Bounce Count Exceeds Limit [ Bounce count=10 ]

Details :Mail Outgoing blocked. Reason :Daily Mail Bounce Count Exceeds Limit [ Bounce count=10 ]

Dear All

Pls help me to fix this. im getting this message saying user blocked. What should i do? I think my officer try to send emails to the wrong mail address.

User : 
Details :Mail Outgoing blocked. Reason :Daily Mail Bounce Count Exceeds Limit [ Bounce count=10 ] 

Best regards
Gihan