Her er et eksempel med html:
<?php
$from = 'din@email-adresse.dk'; //RET DENNE
$emne = "HTML";
$besked = <<<EOL
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "
http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"><html xmlns="
http://www.w3.org/1999/xhtml"><head>
<title>Titel</title>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<style type="text/css">
#kalender{border:10px groove #6699FF;border-collapse:collapse;}
#kalender td{border:1px solid #CCFFFF; padding: 5px;}
</style>
</head>
<body>
<table id="kalender">
<tr><td>Hej hej</td><td>12345</td></tr>
<tr><td>Hej hej</td><td>12345</td></tr>
</table>
</body>
</html>
EOL;
$header = "mime-type: 1.0\n";
$header .= "Content-type: text/html; charset=iso-8859-1\n";
$header .= "From: $from\n";
$header .= "Return-Path: $from\n";
$res = mysql_query("SELECT user_email FROM phpbb_users");
while ($row = mysql_fetch_assoc($res)) {
@mail($row['user_email'], $emne, $besked, $header);
}
echo "Mails er afsendt";
?>