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Congress passes laws about what can go through the US mail (which are signed into law by the President).
Postal Inspectors, who work for the U.S. Postal Inspection Service (which falls under the Executive branch of the government) are responsible for enforcing the laws. When dangerous materials are being sent with the intention to harm someone, Homeland Security (usually via the FBI) may get involved. Illicit drugs through the mail might get the DEA involved. Illegal weapons shipments (and illegal alcohol and tobacco) might get the ATF involved.
What else can I help you with?
Can congress change regulating what goes through the US mail?
Yes.
Can you mail a slingshot through the us mail?
yes
Can you send marijuana through the us mail?
No, it is illegal to mail controlled substances.
The Pony Express carried what through the Wild West?
The US Mail
Can you send an air rifle through mail?
(in the US) Yes, you may.
Does an International letter to the US need US postage stamps?
No. The International Postal Union regulates the exchange of mail. The postage is collected and affixed at the post office of origin and no stamps of any other country are required.
Is chainmail illegal?
Through US "Snail" mail, YES. Through Email worldwide, unfortunately not.
What is the mail mountain chain that runs through the eastern United states?
I do not believe that the us postal service has a mail mountain.
Who regulates the US money?
us government..lol
Why is it important for people immigrating to Canada to be knowledgeable about our country?
Canada is the neighbor of the US. The United States regulates everything that goes in and out of Canada. This is because the US is the largest protector and largest trading partner.
Can you mail food snacks through the US postal service?
Noyou cant!
Who regulates trade in the US?
Congress
