and if you want to get the whole list of what is working and what features are turned off put the following code into a file and call it up with your browser:
<html>
<head>
<title>PHP Test</title>
</head>
<body>
<?php
phpinfo();
?>
</body>
</html>
Do you have any indication what triggers the spam filter? (GMX marks it with a letter whether it's because of the Subject, the Server it came from, or a global senders list etc.)
Maybe make the subject a little bit more elaborate could help too.
