title: Hash from "email+salt " as a token to verify email
body: <p>I'm verifying user email address. <BR>
  The way most people tell  is to create some unique token store it in db and 
  send to user.</p>
  
  <p>I'm doing it with just hashing (sha256) email addres with sitewide salt<BR>
  and sending this hash to user.</p>
  
  <p>Am i missing something or is this enough to verify?</p>