diff --git a/host_vars/mail01.l3d.space/vault.yml b/host_vars/mail01.l3d.space/vault.yml
index f20ff3c..262a62f 100644
--- a/host_vars/mail01.l3d.space/vault.yml
+++ b/host_vars/mail01.l3d.space/vault.yml
@@ -1,50 +1,62 @@
 $ANSIBLE_VAULT;1.1;AES256
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diff --git a/roles/mailserver_preperation/defaults/main.yml b/roles/mailserver_preperation/defaults/main.yml
index fc1a054..5bdb6ce 100644
--- a/roles/mailserver_preperation/defaults/main.yml
+++ b/roles/mailserver_preperation/defaults/main.yml
@@ -4,4 +4,27 @@ additional_v4nameserver: '46.182.19.48'
 additional_v6nameserver: '2a02:2970:1002::18'
 additional_dns_maildomains: "{{ ansible_fqdn }}"
 
+# which is the reverse dns and dns name of this mail server
 mailserver_domain: "{{ ansible_fqdn }}"
+
+mailserver__domains: []
+#  - fqdn: example.com
+
+mailserver__accounts: []
+#  - username: 'alice'
+#    domain: 'example.com'
+#    password_hash:  # generate with $(doveadm pw -s SHA512-CRYPT)
+#      # or $ python -c 'import crypt,getpass; print(crypt.crypt(getpass.getpass(), crypt.mksalt(crypt.METHOD_SHA512)))'
+#    quota: '0'
+#    enabled: true
+#    sendonly: false
+
+mailserver__alias:
+#  - src_username: 'bob' # null for catchall
+#    src_domain: 'example.com'
+#    dest_username: 'alice'
+#    dest_domain: 'example.com'
+#    enabled: true
+
+# should we enable basic versionscheck (true is recomended)
+submodules_versioncheck: false
diff --git a/roles/mailserver_preperation/files/schema.sql b/roles/mailserver_preperation/files/schema.sql
index 58a0e93..b55690f 100644
--- a/roles/mailserver_preperation/files/schema.sql
+++ b/roles/mailserver_preperation/files/schema.sql
@@ -2,14 +2,14 @@ CREATE DATABASE IF NOT EXISTS vmail CHARACTER SET 'utf8';
 
 USE vmail;
 
-CREATE TABLE `domains` (
+CREATE TABLE IF NOT EXISTS `domains` (
     `id` int unsigned NOT NULL AUTO_INCREMENT,
     `domain` varchar(255) NOT NULL,
     PRIMARY KEY (`id`),
     UNIQUE KEY (`domain`)
 );
 
-CREATE TABLE `accounts` (
+CREATE TABLE IF NOT EXISTS `accounts` (
     `id` int unsigned NOT NULL AUTO_INCREMENT,
     `username` varchar(64) NOT NULL,
     `domain` varchar(255) NOT NULL,
@@ -22,9 +22,9 @@ CREATE TABLE `accounts` (
     FOREIGN KEY (`domain`) REFERENCES `domains` (`domain`)
 );
 
-CREATE TABLE `aliases` (
+CREATE TABLE IF NOT EXISTS `aliases` (
     `id` int unsigned NOT NULL AUTO_INCREMENT,
-    `source_username` varchar(64) NOT NULL,
+    `source_username` varchar(64) NULL,
     `source_domain` varchar(255) NOT NULL,
     `destination_username` varchar(64) NOT NULL,
     `destination_domain` varchar(255) NOT NULL,
@@ -34,7 +34,7 @@ CREATE TABLE `aliases` (
     FOREIGN KEY (`source_domain`) REFERENCES `domains` (`domain`)
 );
 
-CREATE TABLE `tlspolicies` (
+CREATE TABLE IF NOT EXISTS  `tlspolicies` (
     `id` int unsigned NOT NULL AUTO_INCREMENT,
     `domain` varchar(255) NOT NULL,
     `policy` enum('none', 'may', 'encrypt', 'dane', 'dane-only', 'fingerprint', 'verify', 'secure') NOT NULL,
diff --git a/roles/mailserver_preperation/tasks/main.yml b/roles/mailserver_preperation/tasks/main.yml
index 74f09d5..9005040 100644
--- a/roles/mailserver_preperation/tasks/main.yml
+++ b/roles/mailserver_preperation/tasks/main.yml
@@ -1,4 +1,6 @@
 ---
+- include_tasks: versioncheck.yml
+  when: submodules_versioncheck|bool
 
 - name: "set {{ inventory_hostname }} as hostname"
   become: true
diff --git a/roles/mailserver_preperation/tasks/mariadb.yml b/roles/mailserver_preperation/tasks/mariadb.yml
index 2439086..a9dc323 100644
--- a/roles/mailserver_preperation/tasks/mariadb.yml
+++ b/roles/mailserver_preperation/tasks/mariadb.yml
@@ -22,18 +22,20 @@
     dest: /root/.mariadb_schema/config.sql
   register: mysqlconfig
 
-- name: Import database schema
+- name: create database schema
   become: true
-  mssql_db:
+  community.mysql.mysql_db:
     name: vmail
+    encoding: 'utf8'
     state: import
     target: '/root/.mariadb_schema/schema.sql'
   when: mysqlschema.changed
 
 - name: Import database schema
   become: true
-  mssql_db:
+  community.mysql.mysql_db:
     name: vmail
+    encoding: 'utf8'
     state: import
     target: '/root/.mariadb_schema/config.sql'
   when: mysqlconfig.changed
diff --git a/roles/mailserver_preperation/tasks/versioncheck.yml b/roles/mailserver_preperation/tasks/versioncheck.yml
new file mode 100644
index 0000000..7977e52
--- /dev/null
+++ b/roles/mailserver_preperation/tasks/versioncheck.yml
@@ -0,0 +1,46 @@
+---
+- name: Create directory for versionscheck
+  become: true
+  file:
+    path: '/etc/.ansible-version'
+    state: directory
+    mode: 0755
+  when: submodules_versioncheck|bool
+
+- name: check playbook version
+  become: true
+  slurp:
+    src: "/etc/.ansible-version/{{ playbook_version_path }}"
+  register: playbook_version
+  when: submodules_versioncheck|bool
+  ignore_errors: yes
+  failed_when: false
+
+- name: Print remote role version
+  debug:
+    msg: "Remote role version: {{ playbook_version.content | default('Y3VycmVudGx5IG5vdCBkZXBsb3llZAo=') | b64decode | string }}"
+  when: submodules_versioncheck|bool
+
+- name: Print locale role version
+  debug:
+    msg: "Local role version: '{{ playbook_version_number|string }}'."
+  when: submodules_versioncheck|bool
+
+- name: Check if your version is outdated
+  fail:
+    msg: "Your ansible module has the version '{{ playbook_version_number }}' and is outdated. You need to update it!"
+  when:
+    - playbook_version.content|default("Mgo=")|b64decode|int - 1 >= playbook_version_number|int and submodules_versioncheck|bool
+
+- name: check if '/etc/ansible-version/' is empty
+  find:
+    paths: '/etc/ansible-version/'
+  register: filesFound
+
+- name: write new version to remote disk
+  become: true
+  copy:
+    content: "{{ playbook_version_number }}"
+    dest: "/etc/.ansible-version/{{ playbook_version_path }}"
+    mode: 0644
+  when: submodules_versioncheck|bool
diff --git a/roles/mailserver_preperation/templates/mysqlconfig.sql.j2 b/roles/mailserver_preperation/templates/mysqlconfig.sql.j2
index e9eb209..053e222 100644
--- a/roles/mailserver_preperation/templates/mysqlconfig.sql.j2
+++ b/roles/mailserver_preperation/templates/mysqlconfig.sql.j2
@@ -1,27 +1,11 @@
 {#-
-  which table are we setting up
--#}
-use vmail;
-{#-
-  setup mailserver domain
-#}
-insert into domains (domain) values ('{{ mailserver_domain }}');
-{#-
-  create all mail users, domains and enter password hashes...
-
-
-  CREATE TABLE `accounts` (
-    `id` int unsigned NOT NULL AUTO_INCREMENT,
-    `username` varchar(64) NOT NULL,
-    `domain` varchar(255) NOT NULL,
-    `password` varchar(255) NOT NULL,
-    `quota` int unsigned DEFAULT '0',
-    `enabled` boolean DEFAULT '0',
-    `sendonly` boolean DEFAULT '0',
-    PRIMARY KEY (id),
-    UNIQUE KEY (`username`, `domain`),
-    FOREIGN KEY (`domain`) REFERENCES `domains` (`domain`)
-  );
+
+  This is the mysql command template for updating all existing users, domains and alias config.
+  The following yml is an example confiuration...
+############
+---
+  mailserver__domains:
+    - fqdn: example.com
 
   mailserver__accounts:
     - username: 'alice'
@@ -39,34 +23,77 @@ insert into domains (domain) values ('{{ mailserver_domain }}');
       dest_domain: 'example.com'
       enabled: true
 
-#}
-{% for account in mailserver__accounts %}
+###############
+
+  OK, first we select the wanted database!
+
+-#}
+
+use vmail;
+
 {#
-  INSERT into accounts (username, domain, password, quota, enabled, sendonly) values ('{{ account["username"] }}', '{{ account["domain"] }}', '{{ account["password_hash"] }}', {{ account["quota"]|default(0) | int }}, {{ account["enabled"] | bool |ternary('true', 'false') }} , {{ account["sendonly"] | bool |ternary('true', 'false' }});
+
+  Next we will define all existing domains.
+  We use INSERT IGNORE to insert the domains and ignore duplicates.
+
+  To delete a domain you have to do it manually using mysql commands or sth. like that!
+
+-#}
+
+INSERT IGNORE INTO domains
+  (domain)
+values
+{% for domain in mailserver__domains %}
+  ('{{ domain["fqdn"] }}')
+  {%- if loop.last -%}
+    ;
+  {%- else -%}
+    ,
+  {%- endif %}
+
+{% endfor %}
+
+{#-
+
+  Now we will define the users and passwords.
+  We will use REPLACE to replace updated entrys or add new one.
+
 #}
+
 REPLACE into accounts
   (username, domain, password, quota, enabled, sendonly)
 values
-  ('{{ account["username"] }}', '{{ account["domain"] }}', '{{ account["password_hash"] }}', {{ account["quota"]|default(0) | int }}, {{ account["enabled"] | bool | ternary('true', 'false') }} , {{ account["sendonly"] | bool | ternary('true', 'false' )}});
+{% for account in mailserver__accounts %}
+  ('{{ account["username"] }}', '{{ account["domain"] }}', '{{ account["password_hash"] }}', {{ account["quota"]|default(0) | int }}, {{ account["enabled"] | bool | ternary('true', 'false') }} , {{ account["sendonly"] | bool | ternary('true', 'false' )}})
+  {%- if loop.last -%}
+    ;
+  {%- else -%}
+    ,
+  {%- endif %}
+
 {% endfor %}
-{#-
-  create all mail aliases and stuff like that...
-#}
-{% for alias in mailserver__alias %}
+
 {#
-  INSERT into aliases
-    (source_username, source_domain, destination_username, destination_domain, enabled)
-  values
-    ('{{ alias["src_username"] }}', '{{ alias["src_domain"] }}', '{{ alias["dest_username"] }}', '{{ alias["dest_domain"] }}', {{ alias["enabled"] | bool | ternary('true', 'false') }});
+
+  Last we will define some aliases and catchall...
+
 #}
+
 REPLACE into aliases
   (source_username, source_domain, destination_username, destination_domain, enabled)
 values
+{% for alias in mailserver__alias %}
   (
     {%- if alias["src_username"] == 'null' -%}
       null
     {%- else -%}
       '{{ alias["src_username"] }}'
     {%- endif -%}
-      , '{{ alias["src_domain"] }}', '{{ alias["dest_username"] }}', '{{ alias["dest_domain"] }}', {{ alias["enabled"] | bool | ternary('true', 'false') }});
+      , '{{ alias["src_domain"] }}', '{{ alias["dest_username"] }}', '{{ alias["dest_domain"] }}', {{ alias["enabled"] | bool | ternary('true', 'false') }})
+  {%- if loop.last -%}
+    ;
+  {%- else -%}
+    ,
+  {%- endif %}
+
 {% endfor %}
diff --git a/roles/mailserver_preperation/vars/main.yml b/roles/mailserver_preperation/vars/main.yml
new file mode 100644
index 0000000..30d428c
--- /dev/null
+++ b/roles/mailserver_preperation/vars/main.yml
@@ -0,0 +1,3 @@
+---
+playbook_version_number: 32 # should be int
+playbook_version_path: 'role-mailserver_roles-ansile_github.com.version'