--- email.module	2007-04-16 22:58:31.000000000 -0700
+++ email.module	2007-05-25 11:34:22.000000000 -0700
@@ -30,7 +30,7 @@ function email_field_settings($op, $fiel
   switch ($op) {
     case 'database columns':
       $columns = array(
-        'email' => array('type' => 'varchar', 'length' => 255, 'not null' => TRUE),
+        'email' => array('type' => 'varchar', 'length' => 255, 'not null' => FALSE),
       );
       return $columns;
   }