diff --git a/sig-api-machinery/README.md b/sig-api-machinery/README.md
index 8765e5cf5aa..cf09ae5ca72 100644
--- a/sig-api-machinery/README.md
+++ b/sig-api-machinery/README.md
@@ -99,6 +99,8 @@ The following subprojects are owned by sig-api-machinery:
     - https://raw.githubusercontent.com/kubernetes/kubernetes/master/staging/src/k8s.io/sample-controller/OWNERS
     - https://raw.githubusercontent.com/kubernetes/sample-apiserver/master/OWNERS
     - https://raw.githubusercontent.com/kubernetes/sample-controller/master/OWNERS
+  - Contact
+    - [Mailing List](https://groups.google.com/forum/#!forum/kubebuilder)
 - **universal-machinery**
   - Owners:
     - https://raw.githubusercontent.com/kubernetes/apimachinery/master/OWNERS
diff --git a/sigs.yaml b/sigs.yaml
index 4e65e1fb6cd..f1a197188d8 100644
--- a/sigs.yaml
+++ b/sigs.yaml
@@ -105,6 +105,8 @@ sigs:
     - https://raw.githubusercontent.com/kubernetes/apiserver/master/OWNERS
     - https://raw.githubusercontent.com/kubernetes/kubernetes/master/staging/src/k8s.io/apiserver/OWNERS
   - name: server-sdk
+    contact:
+      mailing_list: https://groups.google.com/forum/#!forum/kubebuilder
     owners:
     - https://raw.githubusercontent.com/kubernetes-incubator/apiserver-builder-alpha/master/OWNERS
     - https://raw.githubusercontent.com/kubernetes-sigs/controller-runtime/master/OWNERS