The primary function of Post Office is collection, processing, transmission and delivery of mail. All postal articles whose contents are in the nature of message can be classified as mail which includes Letters, Postcards, Inland Letter Cards, Packets, Ordinary, Registered, Insured, Value Payable articles and Speed Post.
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blog.page.meta-titleAdding an Address to the USPS DatabaseAbout the United States Postal Service - Who we areUSPS Change of AddressMail is further classified as first class and second class mail. First class mail gets free air transmission within India; whereas second class mail gets air lift only if prepaid with air surcharge.
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