Files
unkinben b09cd1628d feat(postfix): deploy postfix MTA and rspamd spam filter
- mailgateway namespace with Deployment + HPA (2-6 replicas)
- rspamd Deployment + HPA (2-6 replicas) with milter interface
- postfix configured to relay inbound mail to stalwart via transport maps
- rspamd milter on port 11332 for spam scanning and DKIM signing
- DKIM keys stored in Vault at kubernetes/namespace/mailgateway/default/dkim-keys
- TLS cert via cert-manager (vault-issuer) for mail.main.unkin.net
- rspamd web UI exposed via Traefik Gateway at rspamd.k8s.syd1.au.unkin.net
- postfix external LoadBalancer service for inbound MX on port 25
- Add full main.cf and master.cf as ConfigMap resources mounted via subPath
  - main.cf: relay-only gateway config, texthash: transport maps, rspamd milter
  - master.cf: standard smtp + submission (587, TLS required) + internal processes
- MAILNAME/MY_NETWORKS/MY_DESTINATION env vars kept in sync with main.cf
- LOG_TO_STDOUT=1 for k8s log collection
2026-05-24 12:46:28 +10:00

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YAML

---
apiVersion: gateway.networking.k8s.io/v1
kind: Gateway
metadata:
labels:
traefik.io/instance: internal
annotations:
cert-manager.io/cluster-issuer: vault-issuer
cert-manager.io/common-name: rspamd.k8s.syd1.au.unkin.net
cert-manager.io/private-key-size: "4096"
external-dns.alpha.kubernetes.io/hostname: rspamd.k8s.syd1.au.unkin.net
external-dns.alpha.kubernetes.io/target: 198.18.200.4
name: rspamd
namespace: mailgateway
spec:
gatewayClassName: traefik-internal
listeners:
- allowedRoutes:
namespaces:
from: Same
hostname: rspamd.k8s.syd1.au.unkin.net
name: http
port: 80
protocol: HTTP
- allowedRoutes:
namespaces:
from: Same
hostname: rspamd.k8s.syd1.au.unkin.net
name: https
port: 443
protocol: HTTPS
tls:
certificateRefs:
- group: ""
kind: Secret
name: rspamd-tls
mode: Terminate