How to validate my HTML5 site?

Nikotine Lutritio <[email protected]> Fri, 6 Nov 2015 15:32:43 +0100

Newsgroups	gmane.comp.web.html-tidy.user
Message-ID	<[email protected]>

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Hi there=2C=0A=
I am trying to validate my airline review website http://uk.whattheflight.c=
om the corresponding validator but it does not seems to work.=0A=
Can anyone help?=0A=
Thank you =0A=
Niko 		 	   		  =

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<html>
<head>
<style><!--
.hmmessage P
{
margin:0px=3B
padding:0px
}
body.hmmessage
{
font-size: 12pt=3B
font-family:Calibri
}
--></style></head>
<body class=3D'hmmessage'><div dir=3D'ltr'><pre id=3D"body" style=3D"paddin=
g: 0.5em=3B white-space: pre-wrap=3B word-wrap: break-word=3B background-co=
lor: rgb(255=2C 255=2C 255)=3B">Hi there=2C=0A=
I am trying to validate my airline review website http://uk.whattheflight.c=
om the corresponding validator but it does not seems to work.=0A=
Can anyone help?=0A=
Thank you =0A=
Niko</pre> 		 	   		  </div></body>
</html>=

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