diff --git a/apps/k8s01/mail/mail-values.yaml b/apps/k8s01/mail/mail-values.yaml
index cef81ecbecc822608088ab8948424ed9678737ea..525d411039104ec5b3a48d96a3cb1bf176a3ed57 100644
--- a/apps/k8s01/mail/mail-values.yaml
+++ b/apps/k8s01/mail/mail-values.yaml
@@ -5,15 +5,15 @@ metadata:
     namespace: mail
 type: Opaque
 stringData:
-    values-overrides.yaml: ENC[AES256_GCM,data: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,iv:nidgq+Bnt69l8xWz7SLakyahMqHWf58KyDIKg1Bjp8o=,tag:E4Utb3JP04BcTHYaGxj2iQ==,type:str]
+    values-overrides.yaml: ENC[AES256_GCM,data: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,iv:OTsRx+VNdUvHB5PNEGxi9alGte+h6AMYY4cioKmDPqs=,tag:gW6RxwhBCoL2Q/IvqvVSaw==,type:str]
 sops:
     kms: []
     gcp_kms: []
     azure_kv: []
     hc_vault: []
     age: []
-    lastmodified: "2022-07-14T21:36:07Z"
-    mac: ENC[AES256_GCM,data:CaojqkN9aVSprfxR/8Rz2GdvMAdX1UkELhk8nXmHcfV56a7CV5JEydOcVrFC3XcGYvDJjvM/HEtZroDA79kDIAhuBkNZPxAVAmrHEIhC/RWL9TUqgfN0fwcYOL8iiWLw/DgNJtlQO344NeXqP2QyzKOZHI+elAqHhka8gete6n4=,iv:MdjQXacof+FUPNcV7A5IOwZhEBrMPz44Rq2Bf97twFQ=,tag:lfxQgza75VlrvD1dqtaOqQ==,type:str]
+    lastmodified: "2022-09-25T17:41:28Z"
+    mac: ENC[AES256_GCM,data:h1PsSEZIug+axRbrmPzoI8Py0e+Z8Z+aleVWy61wgV78jRSxeL8jkEQ8NenMByYp/jWTazvz/VaAdBL/Cl51D3AaWF1GxKHFxRJHTZF+zIeBrGKCRh/MiWgJ+gJOE3T0Nwpa3ChxU5CcHv+c87UPzWp059kMouAAgljVt+ytXWU=,iv:nn9w9pjqYucvVsKTsSh+mwL4z+GXCuSEe+/0BzVgoGA=,tag:a4OHF4HPyxYZP2CQaPE9Rw==,type:str]
     pgp:
         - created_at: "2022-04-19T15:47:33Z"
           enc: |-
diff --git a/charts/mok/Chart.yaml b/charts/mok/Chart.yaml
index 94bf2a5204a70ac1b7c6b23abf99703ac602c295..a2f16aa8c47f617f0784c92576582221ef179dc1 100644
--- a/charts/mok/Chart.yaml
+++ b/charts/mok/Chart.yaml
@@ -3,7 +3,7 @@ name: mok
 description: |
   Mail on Kubernetes (MoK) is a project to deploy a functional mailserver that runs without a database server on Kubernetes, taking advantage of configmaps and secret.
 type: application
-version: 0.5.2
+version: 0.6.1
 sources:
   - https://de.postfix.org/ftpmirror/index.html
   - https://github.com/dovecot/core
diff --git a/charts/mok/README.md b/charts/mok/README.md
index 69a685b3cfbc27f04c8cae84463a42e1d947f0e5..c4db6d7c61993d047bd2fa806179c430304323d9 100644
--- a/charts/mok/README.md
+++ b/charts/mok/README.md
@@ -1,6 +1,6 @@
 # mok
 
-![Version: 0.5.2](https://img.shields.io/badge/Version-0.5.2-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square)
+![Version: 0.6.1](https://img.shields.io/badge/Version-0.6.1-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square)
 
 Mail on Kubernetes (MoK) is a project to deploy a functional mailserver that runs without a database server on Kubernetes, taking advantage of configmaps and secret.
 
@@ -53,9 +53,10 @@ Mail on Kubernetes (MoK) is a project to deploy a functional mailserver that run
 | nameOverride | string | `""` |  |
 | networkPolicy.create | bool | `true` | Create NetworkPolicies to access the mailserver from outside |
 | postfix.affinity | object | `{}` |  |
+| postfix.hostname | string | `nil` | explicitly set postfix hostname |
 | postfix.image.pullPolicy | string | `"IfNotPresent"` |  |
 | postfix.image.repository | string | `"quay.io/shivering-isles/postfix"` | postfix container image |
-| postfix.image.tag | string | `"0.2.3"` | Overrides the image tag whose default is "latest" |
+| postfix.image.tag | string | `"0.3.0"` | Overrides the image tag whose default is "latest" |
 | postfix.imagePullSecrets | list | `[]` |  |
 | postfix.nodeSelector | object | `{}` |  |
 | postfix.podAnnotations | object | `{}` |  |
diff --git a/charts/mok/templates/postfix.yaml b/charts/mok/templates/postfix.yaml
index 6a3e32405d98a6ab9aff4bb9cbb901fef0c70335..ab3b7ae5b70d1910f9304e8ee62a7f4e182af847 100644
--- a/charts/mok/templates/postfix.yaml
+++ b/charts/mok/templates/postfix.yaml
@@ -75,6 +75,10 @@ spec:
           env:
             - name: DOVECOT_SERVICE_NAME
               value: {{ include "mok.fullname" . }}-dovecot-internal.{{ .Release.Namespace }}.svc.cluster.local
+            {{- if .Values.postfix.hostname }}
+            - name: HOSTNAME
+              value: {{ .Values.postfix.hostname }}
+            {{- end }}
           image: {{ .Values.postfix.image.repository }}:{{.Values.postfix.image.tag | default "latest" }}
           imagePullPolicy: {{ .Values.postfix.image.pullPolicy }}
           lifecycle:
diff --git a/charts/mok/values.yaml b/charts/mok/values.yaml
index 816aa2e3b5d85cec0c54784692852b34ad0a0380..d7fdd632bff76dc57d29d60c314ded7f906425cb 100644
--- a/charts/mok/values.yaml
+++ b/charts/mok/values.yaml
@@ -36,6 +36,8 @@ relay:
 
 
 postfix:
+  # -- explicitly set postfix hostname
+  hostname: null
   # -- Number of postfix pods.
   replicaCount: 1
 
@@ -44,7 +46,7 @@ postfix:
     repository: quay.io/shivering-isles/postfix
     pullPolicy: IfNotPresent
     # -- Overrides the image tag whose default is "latest"
-    tag: "0.2.3"
+    tag: "0.3.0"
 
   imagePullSecrets: []
 
diff --git a/images/postfix/.release b/images/postfix/.release
index 5bf903b79e9b4a501e8e540d4a851a9b3b0322bf..7f1bdeb40c1300cd15edddfa5b46c9499bac4319 100644
--- a/images/postfix/.release
+++ b/images/postfix/.release
@@ -1 +1 @@
-release=0.2.3
+release=0.3.0
diff --git a/images/postfix/config/main.cf b/images/postfix/config/main.cf
index db10641a7f6824015d630021ccaafe43ee0655b5..11281de1a6ff2b5572ffffe32d81ede4972205e9 100644
--- a/images/postfix/config/main.cf
+++ b/images/postfix/config/main.cf
@@ -89,21 +89,16 @@ virtual_transport = lmtp:inet:dovecot-internal:24
 
 postscreen_access_list = permit_mynetworks
 postscreen_blacklist_action = drop
-postscreen_greet_action = enforce
+postscreen_greet_action = ignore
 postscreen_dnsbl_action = enforce
 postscreen_dnsbl_threshold = 3
-postscreen_dnsbl_whitelist_threshold = -1
+postscreen_dnsbl_allowlist_threshold = -1
 postscreen_dnsbl_sites =
         zen.spamhaus.org*3,
         ix.dnsbl.manitu.net*3,
-        multi.uribl.com,
         bl.spamcop.net,
         b.barracudacentral.org,
-        dnsbl-1.uceprotect.net,
         safe.dnsbl.sorbs.net,
-        ubl.unsubscore.com,
-        psbl.surriel.com,
-        dnsbl.inps.de,
         swl.spamhaus.org*-10,
 
 ########
@@ -122,18 +117,17 @@ smtpd_recipient_restrictions =
         reject_unknown_sender_domain,
         reject_unknown_recipient_domain,
         reject_invalid_hostname,
-		warn_if_reject reject_unauth_pipelining,
-        permit_sasl_authenticated,
+        warn_if_reject reject_unauth_pipelining,
         permit_mynetworks,
-		reject_unverified_recipient,
+        reject_unverified_recipient,
         reject_unauth_destination,
         permit
 
 smtpd_sender_restrictions =
-	permit_mynetworks,
-	reject_non_fqdn_sender,
-	reject_authenticated_sender_login_mismatch,
-	permit_sasl_authenticated
+        permit_mynetworks,
+        reject_non_fqdn_sender,
+        reject_authenticated_sender_login_mismatch,
+        permit_sasl_authenticated
 
 #smtpd_restriction_classes = local_only
 #local_only =