Snopes' reports don't just tell you whether a chain email is true or false - they also report on their investigation information and provide links to statements on the websites of the parties in question which validate their determination of whether the email is true or false.
For Example: In their article "Schools in the UK (or Kentucky) no longer teach about The Holocaust for fear of offending Muslim students?", there appear links to various press releases (on the web sites of the victims of this hoax) that deny the claims made in the email.
