diff --git a/charts/postfix/v0.1.0/templates/deployment.yaml b/charts/postfix/v0.1.0/templates/deployment.yaml
index 5bbaac4..7c791bd 100644
--- a/charts/postfix/v0.1.0/templates/deployment.yaml
+++ b/charts/postfix/v0.1.0/templates/deployment.yaml
@@ -35,6 +35,10 @@ spec:
           env:
             - name: DOMAIN
               value: {{ .Values.postfix.domain | quote }}
+            - name: HOSTNAME
+              valueFrom:
+                fieldRef:
+                  fieldPath: spec.nodeName
             - name: MESSAGE_SIZE_LIMIT
               value: {{ .Values.postfix.messageSizeLimit | quote }}
             - name: RELAYHOST