diff --git a/docs/content/examples/tutorials/mailserver-behind-proxy.md b/docs/content/examples/tutorials/mailserver-behind-proxy.md
index 501d1209..7bdef5d6 100644
--- a/docs/content/examples/tutorials/mailserver-behind-proxy.md
+++ b/docs/content/examples/tutorials/mailserver-behind-proxy.md
@@ -72,14 +72,15 @@ Feel free to add your configuration if you achieved the same goal using differen
           - "traefik.tcp.services.smtp.loadbalancer.server.port=25"
           - "traefik.tcp.services.smtp.loadbalancer.proxyProtocol.version=1"
           - "traefik.tcp.routers.smtp-ssl.rule=HostSNI(`*`)"
-          - "traefik.tcp.routers.smtp-ssl.tls=false"
           - "traefik.tcp.routers.smtp-ssl.entrypoints=smtp-ssl"
+          - "traefik.tcp.routers.smtp-ssl.tls.passthrough=true"
           - "traefik.tcp.routers.smtp-ssl.service=smtp-ssl"
           - "traefik.tcp.services.smtp-ssl.loadbalancer.server.port=465"
           - "traefik.tcp.services.smtp-ssl.loadbalancer.proxyProtocol.version=1"
           - "traefik.tcp.routers.imap-ssl.rule=HostSNI(`*`)"
           - "traefik.tcp.routers.imap-ssl.entrypoints=imap-ssl"
           - "traefik.tcp.routers.imap-ssl.service=imap-ssl"
+          - "traefik.tcp.routers.imap-ssl.tls.passthrough=true"
           - "traefik.tcp.services.imap-ssl.loadbalancer.server.port=10993"
           - "traefik.tcp.services.imap-ssl.loadbalancer.proxyProtocol.version=2"
           - "traefik.tcp.routers.sieve.rule=HostSNI(`*`)"