diff --git a/charts/docker-mailserver/Chart.yaml b/charts/docker-mailserver/Chart.yaml
index 3317ee60..444c0a07 100644
--- a/charts/docker-mailserver/Chart.yaml
+++ b/charts/docker-mailserver/Chart.yaml
@@ -2,7 +2,7 @@ apiVersion: v2
 appVersion: "14.0.0"
 description: A fullstack but simple mailserver (smtp, imap, antispam, antivirus, ssl...) using Docker.
 name: docker-mailserver
-version: 4.0.1
+version: 4.0.3
 sources:
 - https://github.com/docker-mailserver/docker-mailserver-helm
 maintainers:
diff --git a/charts/docker-mailserver/templates/deployment.yaml b/charts/docker-mailserver/templates/deployment.yaml
index 4b71b4ce..9325eda3 100644
--- a/charts/docker-mailserver/templates/deployment.yaml
+++ b/charts/docker-mailserver/templates/deployment.yaml
@@ -80,6 +80,18 @@ spec:
       {{- end }}
     {{- end }}
 
+        # Extra volumes
+      {{- with .Values.deployment.extraVolumes }}
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+
+      {{- if .Values.deployment.initContainers }}
+      initContainers:
+        {{- with .Values.deployment.initContainers }}
+        {{- toYaml . | nindent 8 }}
+        {{- end }}
+      {{- end }}
+
       containers:
         - name: docker-mailserver
           image: {{ .Values.image.name }}:{{ default .Chart.AppVersion .Values.image.tag }}
@@ -147,6 +159,11 @@ spec:
           {{- end }}
         {{- end }}
 
+            # Mount Extra Volumes
+          {{- with $.Values.deployment.extraVolumeMounts }}
+            {{- toYaml . | nindent 12 }}
+          {{- end }}
+
           livenessProbe:
             exec:
                command:
diff --git a/charts/docker-mailserver/values.yaml b/charts/docker-mailserver/values.yaml
index 973a9acb..0a850cf1 100644
--- a/charts/docker-mailserver/values.yaml
+++ b/charts/docker-mailserver/values.yaml
@@ -272,6 +272,27 @@ deployment:
   ## Optionally specify tolerations for the deployment
   tolerations: []
 
+  ## Optionally specify initContainers
+  initContainers: []
+  #  - name: init
+  #    image: alpine:3
+  #    command: [sh, -c]
+  #    args:
+  #      - echo "Hello, world!" > /mnt/extra-storage/test
+  #    volumeMounts:
+  #      - name: extra-storage
+  #        mountPath: /mnt/extra-storage
+
+  ## Optionally specify a list of extra mounts to add (normally used with extraVolumes)
+  extraVolumeMounts: []
+  #  - name: extra-storage
+  #    mountPath: /mnt/extra-storage
+
+  ## Optionally specify a list of extra volumes to add
+  extraVolumes: []
+  #  - name: extra-storage
+  #    emptyDir: {}
+
 service:
   ## What scope the service should be exposed in. One of:
   ## - LoadBalancer (to the world)