A YOUNG Mildura man alleged to have set up a "sophisticated" drug-trafficking business, using Australia Post to send packages of cannabis and ecstasy across the country, has been refused bail.

A police informant told Mildura Magistrates' Court on Wednesday there was a name and logo for the trafficking business, which sent prospective clients a drug menu, as well as notes about themed drug-packed tins for occasions such as Christmas and the Melbourne Cup.