diff --git a/charts/mail-gateway/templates/config.yaml b/charts/mail-gateway/templates/config.yaml
new file mode 100644
index 0000000..457f524
--- /dev/null
+++ b/charts/mail-gateway/templates/config.yaml
@@ -0,0 +1,144 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: maddy
+  namespace: {{ .Release.Namespace }}
+data:
+  smtp-servers.conf: |
+    maddy.{{ .Values.domains.primary.namespace}}.svc.cluster.local:587
+    {{ range .Values.domains.others}}
+    maddy.{{ .namespace }}.svc.cluster.local:587
+    {{ end }}
+  maddy.conf: |
+    $(hostname) = {{ .Values.domains.primary.mx }}
+    $(primary_domain) = {{ .Values.domains.primary.name }}
+    $(local_domains) = {{ .Values.domains.primary.name }}{{ range .Values.domains.others }} {{ .name }}{{ end }}
+
+    tls file /etc/maddy/certs/tls.crt /etc/maddy/certs/tls.key
+
+    auth.external authsmtp {
+        helper /usr/bin/auth-smtp
+        perdomain yes
+        domains $(local_domains)
+    }
+
+    hostname $(hostname)
+
+    msgpipeline local_routing {
+        destination {{ .Values.domains.primary.name }} {
+            deliver_to &{{ .Values.domains.primary.name }}
+        }
+        {{ range .Values.domains.others }}
+        destination {{ .name }} {
+            deliver_to &{{ .name }}
+        }
+        {{ end }}
+        default_destination {
+            reject 550 5.1.1 "User doesn't exist"
+        }
+    }
+
+    smtp tcp://0.0.0.0:25 {
+        insecure_auth no
+
+        defer_sender_reject yes
+
+        limits {
+            # Up to 20 msgs/sec across max. 10 SMTP connections.
+            all rate 20 1s
+            all concurrency 10
+        }
+
+        dmarc yes
+        check {
+            require_mx_record
+            dkim
+            spf
+        }
+
+        source $(local_domains) {
+            reject 501 5.1.8 "Use Submission for outgoing SMTP"
+        }
+        default_source {
+            destination $(local_domains) {
+                deliver_to &local_routing
+            }
+            default_destination {
+                reject 550 5.1.1 "User doesn't exist"
+            }
+        }
+    }
+
+    submission tls://0.0.0.0:465 tcp://0.0.0.0:587 {
+        auth &authsmtp
+        insecure_auth yes
+
+        defer_sender_reject yes
+
+        source $(local_domains) {
+            destination $(local_domains) {
+                deliver_to &local_routing
+            }
+            default_destination {
+                modify {
+                    dkim $(primary_domain) $(local_domains) default
+                }
+                deliver_to &remote_queue
+            }
+        }
+        default_source {
+            reject 501 5.1.8 "Non-local sender domain"
+        }
+    }
+
+    target.smtp {{ .Values.domains.primary.name }} {
+        hostname $(hostname)
+        attempt_starttls false
+        require_tls no
+        auth off
+        targets tcp://maddy.{{ .Values.domains.primary.namespace }}.svc.cluster.local:25
+    }
+
+    {{ range .Values.domains.others }}
+    target.smtp {{ .name }} {
+        hostname mail.{{ .name }}
+        attempt_starttls false
+        require_tls no
+        auth off
+        targets tcp://maddy.{{ .namespace }}.svc.cluster.local:25
+    }
+    {{ end }}
+
+    target.queue remote_queue {
+        target &outbound_delivery
+
+        autogenerated_msg_domain $(primary_domain)
+        bounce {
+            destination postmaster $(local_domains) {
+                deliver_to &local_routing
+            }
+            default_destination {
+                reject 550 5.0.0 "Refusing to send DSNs to non-local addresses"
+            }
+        }
+    }
+
+    target.remote outbound_delivery {
+        limits {
+            # Up to 20 msgs/sec across max. 10 SMTP connections
+            # for each recipient domain.
+            destination rate 20 1s
+            destination concurrency 10
+        }
+        mx_auth {
+            dane
+            mtasts {
+                cache fs
+                fs_dir mtasts_cache/
+            }
+            local_policy {
+                min_tls_level encrypted
+                min_mx_level none
+            }
+        }
+    }
diff --git a/charts/mail-gateway/templates/maddy.yaml b/charts/mail-gateway/templates/maddy.yaml
new file mode 100644
index 0000000..d3469b7
--- /dev/null
+++ b/charts/mail-gateway/templates/maddy.yaml
@@ -0,0 +1,97 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: maddy
+  namespace: {{ .Release.Namespace }}
+spec:
+  selector:
+    matchLabels:
+      app: maddy
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: maddy
+      annotations:
+        checksum/config: {{ include (print $.Template.BasePath "/config.yaml") . | sha256sum }}
+    spec:
+      volumes:
+      - name: config
+        configMap:
+          name: maddy
+      - name: certs
+        secret:
+          secretName: cert-{{ .Values.domains.primary.mx }}
+      - name: data
+        persistentVolumeClaim:
+          claimName: data
+      containers:
+      - name: maddy
+        image: giolekva/maddy-auth-smtp:v0.4.4
+        imagePullPolicy: Always
+        ports:
+        - name: imap
+          containerPort: 143
+          protocol: TCP
+        - name: imaps
+          containerPort: 993
+          protocol: TCP
+        - name: smtp
+          containerPort: 25
+          protocol: TCP
+        - name: smtps
+          containerPort: 465
+          protocol: TCP
+        - name: submission
+          containerPort: 587
+          protocol: TCP
+        command:
+        - maddy
+        - -config
+        - /etc/maddy/config/maddy.conf
+        volumeMounts:
+        - name: config
+          mountPath: /etc/maddy/config
+        - name: certs
+          mountPath: /etc/maddy/certs
+        - name: data
+          mountPath: /var/lib/maddy
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: maddy
+  namespace: {{ .Release.Namespace }}
+spec:
+  type: LoadBalancer
+  externalTrafficPolicy: Local
+  selector:
+    app: maddy
+  ports:
+    - name: imap
+      port: 143
+      protocol: TCP
+    - name: imaps
+      port: 993
+      protocol: TCP
+    - name: smtp
+      port: 25
+      protocol: TCP
+    - name: smtps
+      port: 465
+      protocol: TCP
+    - name: submission
+      port: 587
+      protocol: TCP
+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: data
+  namespace: {{ .Release.Namespace }}
+spec:
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: {{ .Values.persistence.size }}
diff --git a/charts/mail-gateway/templates/mx-certificate.yaml b/charts/mail-gateway/templates/mx-certificate.yaml
new file mode 100644
index 0000000..2999b08
--- /dev/null
+++ b/charts/mail-gateway/templates/mx-certificate.yaml
@@ -0,0 +1,14 @@
+apiVersion: cert-manager.io/v1
+kind: Certificate
+metadata:
+  name: {{ .Values.domains.primary.mx }}
+  namespace: {{ .Release.Namespace }}
+  annotations:
+    helm.sh/resource-policy: keep
+spec:
+  dnsNames:
+  - {{ .Values.domains.primary.mx }}
+  issuerRef:
+    name: {{ .Values.domains.primary.certificateIssuer }}
+    kind: ClusterIssuer
+  secretName: cert-{{ .Values.domains.primary.mx }}