diff --git a/docs/mkdocs.yml b/docs/mkdocs.yml
index ba920774..84ec7371 100644
--- a/docs/mkdocs.yml
+++ b/docs/mkdocs.yml
@@ -124,6 +124,7 @@ nav:
     - 'Best Practices':
       - 'DKIM, DMARC & SPF': config/best-practices/dkim_dmarc_spf.md
       - 'Auto-discovery': config/best-practices/autodiscover.md
+      - 'MTA-STS': config/best-practices/mta-sts.md
     - 'Security':
       - 'Understanding the Ports': config/security/understanding-the-ports.md
       - 'SSL/TLS': config/security/ssl.md