smbclient -M requires a NETBIOS name. If your windows machines aren't running netbios, then this won't work. There is a smbclient -I, which lets you send to an IP, which may be more what you want but I can't get it to work. Maybe you'll have better luck.

It doesn't need much configuring. You may have to edit smb.conf to change your WORKGROUP and NETBIOS name.