diff --git a/mailu/templates/postfix/deployment.yaml b/mailu/templates/postfix/deployment.yaml
index a48d1ad1..aa1d2909 100644
--- a/mailu/templates/postfix/deployment.yaml
+++ b/mailu/templates/postfix/deployment.yaml
@@ -60,6 +60,9 @@ spec:
       {{- if .Values.postfix.initContainers }}
       initContainers: {{- include "common.tplvalues.render" (dict "value" .Values.postfix.initContainers "context" $) | nindent 8 }}
       {{- end }}
+      {{- if .Values.postfix.sidecars }}
+      sidecars: {{- include "common.tplvalues.render" (dict "value" .Values.postfix.sidecars "context" $) | nindent 8 }}
+      {{- end }}
       containers:
         - name: postfix
           image: {{ .Values.imageRegistry }}/{{ .Values.postfix.image.repository }}:{{ default (include "mailu.version" .) .Values.postfix.image.tag }}
diff --git a/mailu/values.yaml b/mailu/values.yaml
index e79550b0..35cc086f 100644
--- a/mailu/values.yaml
+++ b/mailu/values.yaml
@@ -1172,6 +1172,16 @@ postfix:
   ##    command: ['sh', '-c', 'echo "hello world"']
   initContainers: []
 
+  ## @param postfix.sidecards Add additional sidecars to the pod
+  ## ref: https://kubernetes.io/docs/concepts/workloads/pods/
+  ## e.g:
+  ## sidecars:
+  ##  - name: your-image-name
+  ##    image: your-image
+  ##    imagePullPolicy: Always
+  ##    command: ['sh', '-c', 'echo "hello world"']
+  sidecars: []
+
   ## @param postfix.priorityClassName Pods' priorityClassName
   priorityClassName: ""