It can filter out unwanted mails, also known as spam.So by your logic every mail is spam???Read again.I did. Still cannot get a different conclusion from your words.
You overlooked an adjective, and to your question you added a very different adjective, by which the question you asked doesn't logically follow the words I wrote.
-- CVV Konrad M.Kokoszkiewicz, http://draco.atari.org ** Ea natura multitudinis est, ** aut seruit humiliter, aut superbe dominatur. ** Taka to już natura pospólstwa, albo służalczo się płaszczy, ** albo bezczelnie się panoszy. (Liwiusz XXIV, 25).