diff --git a/charts/docker-mailserver/templates/service.yaml b/charts/docker-mailserver/templates/service.yaml
index b374bbe..ef23fe1 100644
--- a/charts/docker-mailserver/templates/service.yaml
+++ b/charts/docker-mailserver/templates/service.yaml
@@ -145,3 +145,6 @@ spec:
   {{- if .Values.service.clusterIp }}
   clusterIP: {{ .Values.service.clusterIp }}
   {{- end }}
+  {{- if .Values.service.trafficDistribution }}
+  trafficDistribution: {{ .Values.service.trafficDistribution }}
+  {{- end }}
diff --git a/charts/docker-mailserver/values.yaml b/charts/docker-mailserver/values.yaml
index a114d89..e975eaf 100644
--- a/charts/docker-mailserver/values.yaml
+++ b/charts/docker-mailserver/values.yaml
@@ -300,6 +300,12 @@ service:
   ## Set it to "Local" when used with type "LoadBalancer" and set it to "Cluster" when used with "NodePort",
   ## unless you have a good reason not to.
   # externalTrafficPolicy: "Cluster"
+  ## Traffic distribution preference for Services. One of:
+  ## - PreferClose
+  ## - PreferSameZone (started from 1.34)
+  ## - PreferSameNode (started from 1.34)
+  ## Ref: https://kubernetes.io/docs/concepts/services-networking/service/#traffic-distribution
+  trafficDistribution: ""
   ## If there is a port associated with a given service, expose it here.
   # port:
   ## If there is a particular IP that should be used for the service, specify it here.