Fucking dumb ass mail man

So I write my boyfriend that's in jail well correctional facility and I put my aunts address because she lives up stairs . so when he sends me letters he puts my aunts address too m but they continue to put it in my mailbox and my mom checks the mailbox how can I tell the mail am to stop putting it in my box . he comes at 12 and by that time I'm in class could I leave him a note lmfao or could I have my boyfriend write on the front envelope to put it in box c8 or can he not do that