UUnscramblebot

POSTBOX

7 letters
Scrabble US (TWL) Scrabble UK (SOWPODS) Words With Friends
18
Scrabble points
20
WWF points

Letter breakdown

p3 pts
o1 pts
s1 pts
t1 pts
b3 pts
o1 pts
x8 pts

Base Scrabble values — premium squares multiply the total.

Words you can make from POSTBOX's letters

From the TWL dictionary. Use the unscrambler for the full list with all dictionaries.