homelab/k8s/infra/iam/smtp-gotify.yaml

# SMTP -> Gotify relay for ZITADEL notifications.
#
# ZITADEL sends verification codes, password resets and one-time passwords by
# SMTP only, and this cluster has no working mail path: no SMTP credentials are
# configured for ZITADEL, and the notification table shows
# verified_email empty for every user. Without a delivery path nobody can finish
# a first login, at ZITADEL or at any relying party such as Forgejo.
#
# This relay accepts plain SMTP on :2525 and forwards every message to Gotify,
# so codes arrive on the phone through the existing gotify/igotify setup instead
# of email. ZITADEL then points DefaultInstance.SMTPConfiguration at this
# Service (see k8s/infra/iam/zitadel-values.yaml).
#
# The Gotify token is a Secret, never a literal here.
apiVersion: apps/v1
kind: Deployment
metadata:
  name: smtp-gotify
  namespace: iam
  labels:
    app: smtp-gotify
spec:
  replicas: 1
  revisionHistoryLimit: 2
  selector:
    matchLabels:
      app: smtp-gotify
  template:
    metadata:
      labels:
        app: smtp-gotify
    spec:
      securityContext:
        runAsNonRoot: true
        runAsUser: 65534
        runAsGroup: 65534
        seccompProfile:
          type: RuntimeDefault
      containers:
        - name: smtp-gotify
          image: quay.io/reiml/smtp-gotify:latest
          imagePullPolicy: IfNotPresent
          env:
            - name: GOTIFY_URL
              value: "http://gotify.notifications.svc.cluster.local/"
            - name: GOTIFY_TOKEN
              valueFrom:
                secretKeyRef:
                  name: smtp-gotify
                  key: token
            - name: GOTIFY_PRIORITY
              value: "5"
            # No title template: the relay's default title already carries
            # the mail subject, and a wrong template field fails the push
            # silently (the SMTP side still answers 250, so the sender thinks
            # the message was delivered).
          ports:
            - name: smtp
              containerPort: 2525
              protocol: TCP
          securityContext:
            allowPrivilegeEscalation: false
            readOnlyRootFilesystem: true
            capabilities:
              drop: ["ALL"]
          resources:
            requests:
              cpu: 10m
              memory: 32Mi
            limits:
              cpu: 200m
              memory: 128Mi
          readinessProbe:
            tcpSocket:
              port: smtp
            initialDelaySeconds: 3
            periodSeconds: 10
          livenessProbe:
            tcpSocket:
              port: smtp
            initialDelaySeconds: 10
            periodSeconds: 20
---
apiVersion: v1
kind: Service
metadata:
  name: smtp-gotify
  namespace: iam
  labels:
    app: smtp-gotify
spec:
  type: ClusterIP
  selector:
    app: smtp-gotify
  ports:
    - name: smtp
      port: 2525
      targetPort: smtp
      protocol: TCP