Free Stuff By Mail is part of a postal system wherein written documents, typically enclosed in envelopes, and also small packages, are delivered to destinations around the world. Anything sent through the postal system is called mail or post Free Stuff By Mail.
In principle, a postal service can be private or public Free Stuff By Mail. Governments often place restrictions on private postal delivery systems. Since the mid 19th century national postal systems have generally been established as government monopolies with a fee on the article prepaid Free Stuff By Mail. Proof of payment is often in the form of adhesive postage stamps, but postage meters are also used for bulk mailing Free Stuff By Mail.
Postal systems often have functions other than sending letters Free Stuff By Mail. In some countries, the postal system also has some authority over telephone and telegraph systems Free Stuff By Mail. In others, postal systems allow for savings accounts and handling applications for passports Free Stuff By Mail.