Rearranging the letters of 'The Postmaster General' gives:
He's letter + post manager.
(by Jean
Merges using Anagram Genius) (2004) (pending approval)
Other related anagrams without their own page:
"The General Post Office" -> "Each letters' pigeon off." (by Mick Tully using Anagram Genius) (2007) (pending approval)
"Prince Charles and Camilla to appear on postage stamps" -> "Slaphead palace parasite, contrasting common slapper." (by David Bourke using Anagram Genius) (2005)