A Colorado man has been sentenced to federal prison for shipping marijuana through the mail, according to the U.S. Attorney’s Office in Kansas City. 

Prosecutors said James Mack, 38, of Westminster was sentenced Wednesday to five years in federal prison without parole. He was also ordered to forfeit $1.5 million, representing the proceeds of his illegal drug trafficking, to the government. 

Mack pled guilty in August to participating in a conspiracy to distribute marijuana and to participating in a money-laundering conspiracy.

Prosecutors said Mack admitted to sending several pounds of marijuana to his co-defendant, 29-year-old Justin Polson, in Overland Park, Kansas. Polson pled guilty to the same charges in September and is awaiting sentencing. 

Prosecutors said Mack sent between two and six five-gallon plastic buckets per week from September 2012 to May 2014. The buckets each contained about three pounds of marijuana. Prosecutors said Mack also sent about 40 pounds of marijuana per month between June 2014 and May 2015. 

Prosecutors said Polson paid for the marijuana by depositing about $3 million into Mack’s bank account. He made the deposits in increments of less than $10,000 to avoid reporting requirements.