postalize
/ˈpəʊst(ə)lʌɪz/ /ˈpəʊstəlʌɪz/(also postalise)
verb
[with object] To introduce a system of pricing similar to that used in the postal system, especially in having fixed prices for delivery, regardless of distance.
Origin
Late 19th century; earliest use found in The Review of Reviews. From postal + -ize.