only show advanced options when spf_available

app/dashboard/templates/dashboard/mailbox_detail.html

@@ -106,10 +106,10 @@
 
       </div>
 
-      <hr>
-      <h2 class="h4">Advanced Options</h2>
-
       {% if spf_available %}
+        <hr>
+        <h2 class="h4">Advanced Options</h2>
+
         <div class="card" id="spf">
           <form method="post">
             <input type="hidden" name="form-name" value="force-spf">