Police raided the homes of the 56-year-old postie and two other men, aged 35 and 27, in southern Sydney where they found a treasure trove of stolen goods.
These included wads of Australian and US cash totalling more than $14,000, a Rolex watch, Louis Vuitton handbags, a taser, electronic items and cartons of cigarettes.
Detectives from Strike Force Rubi with help from Australia Post investigated the postal employee who rifled through the mail in Edgecliff, Woollahra and Double Bay in Sydney's eastern suburbs.
They allege he supplied the stolen bank cards to two separate organised crime syndicates.
It is estimated the cards were used for more than $1.4 million worth of fraud.
The Rockdale man was charged with more than 140 fraud and postal offences.
The 35-year-old man was arrested at another Rockdale home, where he was charged with more than 60 fraud counts and one count of receiving stolen mail.
Both men were refused bail and appeared in a local court later on Thursday.
The youngest man was arrested in Roselands and charged with 80 offences including fraud and attempted fraud.
More arrests and charges are expected under the strike force, police said.
