"Residents had long been complaining to the police they were not receiving hundreds of important documents," local policeman Gianni di Carlo told AFP.
"We went to his house and we found a huge amount of mail in his garage," he said.
"We found 400 kilos of it, all divided up by category," he added. Some of the mail dated back to as far back as four years ago.
The 50-year-old postman in Mores, a village of 2,000 people in rural Sardinia, faces up to three years in prison for "stealing mail".
"He seemed like a nice guy but he did have late nights and drink a bit too much. Maybe that's why he was so lazy," said Fidel, owner of a local hotel.
A local hairdresser said: "I think he just didn't want to work."