What are the services of post department?
Answers: You can send correspondence and packages. Also, you can pick up mail/packages that didn't get deliver to your house. You can apply for passports and get passport photos taken. You can also buy any e-mail supplies--envelopes, stamps, boxes, etc.
Deliver mail and other packages
Have a shooting within the backroom at least once a year
http://www.usps.com/
Check the website it will supply you all the info