diff --git a/dist/templates/upload/upload-ok.html.hbs b/dist/templates/upload/upload-ok.html.hbs
index 0161f67..c25b2fa 100644
--- a/dist/templates/upload/upload-ok.html.hbs
+++ b/dist/templates/upload/upload-ok.html.hbs
@@ -48,6 +48,10 @@
         <p><span class="email">{{address}}</span></p>
       </div>
       {{/each}}
+      <p>
+        <strong>Note:</strong> Some providers delay e-mails for up to 15 minutes
+        to prevent spam. Please be patient.
+      </p>
     {{/if}}
 
     {{#if count_unparsed}}