Untitled

form.html:

<html>
<body>
<form action="submit.php" method="post">
<input type="text" name="email">
<input type="sumbit" value="Go">
</form>
</body>
</html>

submit.php:

<?php
// connect

$email = $_POST['email'];
$email = mysql_real_escape_string($email);
mysql_query("INSERT INTO emails (email) VALUES ('$email')";
?>

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look
me or you at the insert try:
VALUES ({'$email'})
or
VALUES ({$email})
or
VALUES ('{$email}')