In Zitsland, Jeremy has been sorting through the incoming mail. Not long ago, his mother discovered that he had thrown a postcard from his Aunt Joan into the junk mail box, believing that it wasn’t real mail. Jeremy’s mother remonstrates:
Jeremy simply rejects the idea of postcards, as an outmoded system of communications — deservedly outmoded, because it is unacceptably insecure.
(Side point: note that Jeremy gets away with High Attachment for the modifier that anybody could read — with the relative clause understood as modifying a card, rather than modifying the immediately preceding, and structurally lower, NP envelope.)