diff --git a/common/scripts/clean_old_logs.php b/common/scripts/clean_old_logs.php
new file mode 100644
index 000000000..a99eeb7a3
--- /dev/null
+++ b/common/scripts/clean_old_logs.php
@@ -0,0 +1,66 @@
+<?php
+
+/**
+ * This script deletes old logs from the database.
+ * 
+ * Rhymix produces various logs that can increase the size of the database
+ * unnecessarily if not cleaned. This script removes old logs.
+ */
+require_once __DIR__ . '/common.php';
+
+// Delete logs older than this number of days.
+$days = 30;
+
+// Initialize the exit status.
+$exit_status = 0;
+
+// Delete advanced mailer mail logs.
+$args = new stdClass;
+$args->regdate = date('YmdHis', time() - ($days * 86400));
+$output = executeQuery('advanced_mailer.deleteMailLogs', $args);
+if ($output->toBool())
+{
+	echo "Successfully deleted all mail logs older than $days days.\n";
+}
+else
+{
+	echo "Error while deleting mail logs older than $days days.\n";
+	echo $output->getMessage() . "\n";
+	$exit_status = 11;
+}
+
+// Delete advanced mailer SMS logs.
+$args = new stdClass;
+$args->regdate = date('YmdHis', time() - ($days * 86400));
+$output = executeQuery('advanced_mailer.deleteSMSLogs', $args);
+if ($output->toBool())
+{
+	echo "Successfully deleted all SMS logs older than $days days.\n";
+}
+else
+{
+	echo "Error while deleting SMS logs older than $days days.\n";
+	echo $output->getMessage() . "\n";
+	$exit_status = 12;
+}
+
+// Delete spamfilter logs.
+$args = new stdClass;
+$args->regdate = date('YmdHis', time() - ($days * 86400));
+$output = executeQuery('spamfilter.deleteLog', $args);
+if ($output->toBool())
+{
+	echo "Successfully deleted all spamfilter logs older than $days days.\n";
+}
+else
+{
+	echo "Error while deleting spamfilter logs older than $days days.\n";
+	echo $output->getMessage() . "\n";
+	$exit_status = 12;
+}
+
+// Set the exit status if there were any errors.
+if ($exit_status != 0)
+{
+	exit($exit_status);
+}
diff --git a/modules/spamfilter/queries/deleteLog.xml b/modules/spamfilter/queries/deleteLog.xml
new file mode 100644
index 000000000..ee66f92af
--- /dev/null
+++ b/modules/spamfilter/queries/deleteLog.xml
@@ -0,0 +1,8 @@
+<query id="deleteLog" action="delete">
+    <tables>
+        <table name="spamfilter_log" />
+    </tables>
+    <conditions>
+        <condition operation="less" column="regdate" var="regdate" notnull="notnull" />
+    </conditions>
+</query>