In the film, The Transporter, there are several rules for using the courier service Jason Statham offers. One is "Don't open the package."
In this utterly ridiculous spam-scam, someone using a gmail address that Google should be required to verify rights to but chooses not to, is pretending to be a courier - and to know what's in the package. The silly thing is that even if he was a courier and even if he did open the package he would not know the information upon which the fraud is predicated.