diff --git a/templates/dashboard/domain_detail/dns.html b/templates/dashboard/domain_detail/dns.html
index 6b46feea..75c26723 100644
--- a/templates/dashboard/domain_detail/dns.html
+++ b/templates/dashboard/domain_detail/dns.html
@@ -266,7 +266,9 @@
           <i>dkim._domainkey.{{ custom_domain.domain }}</i> as domain value instead.
           <br />
           If you are using a subdomain, e.g. <i>subdomain.domain.com</i>,
-          you need to use <i>dkim._domainkey.subdomain</i> as domain value instead.
+          you need to use <i>dkim._domainkey.subdomain</i> as the domain instead.
+          <br />
+          That means, if your domain is <i>mail.domain.com</i> you should enter <i>dkim._domainkey.mail.domain.com</i> as the Domain.
           <br />
         </div>
         <div class="alert alert-info">