dont worry to much about the eBox
ur better of checking the menu for email messages
there is adelay on the eBox which is why u might notice sometimes that ur inbos in ur menu says u hav new messages but ur eBox doesnt
thats becuase any new emails take around 12-15 hours to register with eBox and so even though u might recieve an email, it wont show on the eBox till many hours later, meanwhile u can check that its there on ur menu index
if you dont check ur email for a few days then u might happen to see ur eBox mentioning you hav some new msgs
otherwise
just use ur dropdown menu in ur my.csu index