diff --git a/data/mailman/core/mailman-extra.cfg b/data/mailman/core/mailman-extra.cfg
new file mode 100644
index 0000000..bb9ff7e
--- /dev/null
+++ b/data/mailman/core/mailman-extra.cfg
@@ -0,0 +1,15 @@
+[mta]
+incoming: mailman.mta.postfix.LMTP
+outgoing: mailman.mta.deliver.deliver
+lmtp_host: mailman-core
+lmtp_port: 8024
+smtp_host: postfix
+smtp_port: 25
+configuration: /etc/postfix-mailman.cfg
+
+[mailman]
+default_language: de
+site_owner:mailman@example.com
+
+[archiver.hyperkitty]
+enable: false
diff --git a/data/mailman/web/settings_local.py b/data/mailman/web/settings_local.py
new file mode 100644
index 0000000..b5fc143
--- /dev/null
+++ b/data/mailman/web/settings_local.py
@@ -0,0 +1,9 @@
+# locale
+LANGUAGE_CODE = 'de-de'
+
+# disable social authentication
+SOCIALACCOUNT_PROVIDERS = {}
+
+DEFAULT_FROM_EMAIL='mailman@example.com'
+
+DEBUG = False
diff --git a/mailman-install.sh b/mailman-install.sh
index cbe47a9..e8c56e5 100755
--- a/mailman-install.sh
+++ b/mailman-install.sh
@@ -65,7 +65,7 @@
 done
 
 echo "Mailman list domain: ${MAILMAN_LIST_DOMAIN}"
-echo "Mailman admin email address: ${MAILMAN_ADMIN_EMAIL}"
+echo "Mailman admin user email address: ${MAILMAN_ADMIN_EMAIL}"
 echo "SMTP user for mailman: ${MAILMAN_SMTP_USER}"
 
 
@@ -86,3 +86,8 @@
 MAILMAN_SMTP_USE_TLS=true
 
 EOF
+
+
+# some replace in mailman config files
+sed -i "/^site_owner:/c\\\site_owner:${MAILMAN_SMTP_USER}" data/mailman/core/mailman-extra.cfg
+sed -i "/^DEFAULT_FROM_EMAIL/c\\\DEFAULT_FROM_EMAIL='${MAILMAN_SMTP_USER}'" data/mailman/web/settings_local.py