diff --git a/en_US/installation/0-setup.dns.md b/en_US/installation/0-setup.dns.md
index 53fdddec..892d60b1 100644
--- a/en_US/installation/0-setup.dns.md
+++ b/en_US/installation/0-setup.dns.md
@@ -383,7 +383,8 @@ Outlook Postmaster site provides some useful information for mail server
 administrators, if the email you sent to Outlook.com is marked as spam, please
 take a look:
 
-[Outlook.com Postmaster](https://sendersupport.olc.protection.outlook.com/pm/)
+- [Outlook.com Postmaster](https://sendersupport.olc.protection.outlook.com/pm/)
+- [Smart Network Data Service](https://sendersupport.olc.protection.outlook.com/snds/)
 
 ## References
 
diff --git a/html/setup.dns.html b/html/setup.dns.html
index f51798e4..c61d9f93 100644
--- a/html/setup.dns.html
+++ b/html/setup.dns.html
@@ -387,7 +387,10 @@ Gmail users: <a href="https://support.google.com/mail/answer/81126?hl=en">Bulk S
 <p>Outlook Postmaster site provides some useful information for mail server
 administrators, if the email you sent to Outlook.com is marked as spam, please
 take a look:</p>
-<p><a href="https://sendersupport.olc.protection.outlook.com/pm/">Outlook.com Postmaster</a></p>
+<ul>
+<li><a href="https://sendersupport.olc.protection.outlook.com/pm/">Outlook.com Postmaster</a></li>
+<li><a href="https://sendersupport.olc.protection.outlook.com/snds/">Smart Network Data Service</a></li>
+</ul>
 <h2 id="references">References</h2>
 <ul>
 <li><a href="http://en.wikipedia.org/wiki/MX_record">http://en.wikipedia.org/wiki/MX_record</a></li>