Index: spam.module
===================================================================
--- spam.module	(revision 8624)
+++ spam.module	(working copy)
@@ -459,6 +459,15 @@
     '#default_value' => variable_get('spam_report_feedback', TRUE),
     '#description' => t('If checked, users that are able to report content as spam will be required to leave feedback when reporting spam.  If unchecked, users will not be prompted to leave feedback.'),
   );
+
+  $reportinterval = drupal_map_assoc(array(3600, 7200, 14400, 28800, 86400), 'format_interval');
+  $form['advanced']['spam_reportinterval_time'] = array(
+    '#type' => 'select',
+    '#title' => t('Reported spam report interval'),
+    '#default_value' => variable_get('spam_reportinterval_time', 86400),
+    '#options' => $reportinterval,
+    '#description' => t('Items that have been reported as spam will be relayed to site administrator every time this much time passes. Requires crontab.'),
+  );
   
   /* If you feel you need to display more than 50 spam comments or spam nodes
    * at a time, uncomment the following two lines of code.  For most people
@@ -489,9 +498,9 @@
 function spam_cron() {
   global $base_url;
 
-  // send email notifications every 24 hours
+  // send email notifications every period of time indicated by spam_reportinterval_time
   $email_timer = variable_get('spam_email_timer', 0);
-  if ($email_timer < (time() - 86400)) {
+  if ($email_timer < (time() - variable_get('spam_reportinterval_time', 86400))) {
     variable_set('spam_email_timer', time());
     $result = db_query('SELECT source, COUNT(source) AS count FROM {spam_reported} GROUP BY source');
     if (db_num_rows($result)) {