The regime is opening another front line in its "war on drugs" by keeping an eye on parcels, now increasingly used to transport drugs to avoid police inspections.
The move follows the state's latest three-month anti-drug crackdown across the country which has seen huge confiscations of several millions methamphetamine pills but which have not put a stop to drug offences.
The 200 million speed pills and more than 3,900 kilogrammes of methamphetamine seized during the campaign are only "statistical numbers" that show how much is smuggled into Thailand, National Council for Peace and Order secretary-general Apirat Kongsompong said.
"We'll not stop at this three-month operation," he vowed.
Gen Apirat, also the army chief, on Tuesday called a meeting with 15 companies to jointly find ways to intercept drugs and other illegal items, including firearms, which are being sent through mailing services.
These practices are on the rise as people turn to online shopping, with millions of products traded daily.
The companies must work together with the authorities on measures to prevent themselves from becoming a tool of ill-minded traders, the army chief said.
"We received very good responses from the companies," Gen Apirat said after the meeting.
Initial measures that can be implemented include the installation of security cameras in areas where parcels are received, as well as recording identity information on people who use the services, he said.
Also, the Internal Security Operations Command and the Office of the Narcotics Control Board have been told to set up a new centre to receive complaints about suspicious parcels, he said.
The regime will not ease up in its efforts to combat drug trafficking but will gain momentum in its crackdowns, Gen Apirat said.