$msgbody = "
<html>
<head>
<style type=\"text/css\">
body {

background-image: url(http://www.mio sito.com/images/sfondoemail.jpg);

background-repeat: no-repeat;

background-color: black;

color: white;

}
div.centrale{
position: absolute;
top: 400px;
text-align: right;
}
</style>
<title>Dati TEST</title>
</head>
<body>
<div class=\"centrale\"><img src=\"http://www.miosito.it/eimgaes/$file_name\" /></a></div>
</body>
</html>
";