The Settings.php entry is just for a full email address (not usually recommended as it will make you prone to spam email harvesters).
Since you're using the contact form (wxcontact.php) which deliberately hides your real email address, I suggest you change Settings.php to have $SITE['email'] = "wxcontact.php" instead of your real email address.. then clicking on 'Contact' in the footer will invoke the wxcontact.php page instead.
Best regards,
Ken