--- invite.module	2008-10-06 09:03:08.000000000 -0400
+++ invite.module.new	2009-03-29 21:03:25.000000000 -0400
@@ -911,6 +911,16 @@ function invite_form_validate($form, &$f
         drupal_set_message($error, 'error');
       }
 
+    if($emails) {
+      //check site wide access rules
+      $failed_emails = _invite_validate_emails_access($emails);
+      if (count($failed_emails)) {
+        $error = format_plural(count($failed_emails), 'The following recipient is disallowed based on site access rules:', 'The following recipients are disallowed based on site access rules:') .'<br />';
+        $error .= implode(', ', array_map('check_plain', $failed_emails));
+        drupal_set_message($error, 'error');
+      }
+    }
+
       // Check that there is at least one valid e-mail remaining after filtering
       // out dupes.
       if (count($emails) == 0) {
@@ -977,6 +987,27 @@ function _invite_get_emails($string) {
 }
 
 /**
+ * Filter out e-mails based on site access rules
+ *
+ * @param &$emails
+ *   The list of e-mail addresses to validate. When this function returns, all
+ *   invalid e-mails have already been removed.
+  * @return
+ *   An array of invalid e-mail addresses.
+ */
+function _invite_validate_emails_access(&$emails) {
+  $failed_emails = array();
+  foreach($emails as $email) {
+    if (drupal_is_denied('mail', $email)) {
+      $failed_emails[] = $email;
+    }
+  }
+  // Keep only valid e-mails.
+  $emails = array_diff($emails, $failed_emails);
+  return $failed_emails;
+}
+
+/**
  * Filter out e-mails based on a database query.
  *
  * @param $sql