Perhaps I know a quick and dirty solution for your first problem. Place the following javascript code in an editor, save it as 'index.html'. It redirects visitors to an other website.
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<title>You are being forwarded to...</title>
<script language="JavaScript">
<!--
var time = null
function move() {
window.location = 'https://www.yourdomain/webmail'
}
//-->
</script>
</head>
<body onload="timer=setTimeout('move()',2000)">
</body>
</html>
Not an elegant solution, but it works for me. I'm sure there must be a better way to do this..