diff --git a/app/templates/views/email-not-received.html b/app/templates/views/email-not-received.html
index a379548dd..e6f28df80 100644
--- a/app/templates/views/email-not-received.html
+++ b/app/templates/views/email-not-received.html
@@ -16,6 +16,7 @@ GOV.UK Notify
       <form autocomplete="off" action="" method="post">
           {{ form.hidden_tag() }}
           {{ render_field(form.email_address, class='form-control-2-3') }}
+          <span class="font-xsmall">Your email address must end in .gov.uk</span>
           <p>
           <button class="button" role="button">Resend confirmation code</button>
           </p>