feat: add mta-sts to autodiscover ingress

templates/ingress-autodiscover.yaml

@@ -42,6 +42,16 @@ spec:
                   name: http
             pathType: Prefix
     {{ end }}
+    - host: mta-sts.{{ .Values.config.domain }}
+      http:
+        paths:
+          - path: "/.well-known/mta-sts.txt"
+            backend:
+              service:
+                name: {{ include "mailu-helm.fullname" $ }}-autodiscover
+                port:
+                  name: http
+            pathType: Prefix
     - host: "autodiscover.{{ .Values.config.domain }}"
       http:
         paths: