penny postage
/ˌpɛnɪˈpəʊstɪdʒ/Now historical
noun
The delivery of letters, etc., for a charge of a penny each; specifically the system of delivery devised by Rowland Hill (1795–1879) and introduced into Britain and its colonies in 1840.
Origin
Late 18th century; earliest use found in State of Nation. From penny + postage, after penny post.