update..

roles/common/templates/usr/local/src/mailsystem/conf/install_amavis.conf.j2

@@ -12,11 +12,13 @@ _IPV6='{{ ipv6_address | default(omit) }}'
 _QUARANTINE_DIR=/var/QUARANTINE
 _QUARANTINE_ADMIN=postmaster\@$mydomain
 
-_DB_IN_USE=true
+_DB_IN_USE="{{ db_in_use | default('false') }}"
 {% if "PostgreSQL" == postfix_db_type %}
 _DB_TYPE=PostgreSQL
-{% else %}
+{% elif 'MySQL' == postfix_db_type %}
 _DB_TYPE=MySQL
+{% else %} 
+_DB_TYPE=None
 {% endif %}
 _DB_HOST={{ postfix_db_host | default(omit) }}
 _DB_NAME={{ postfix_db_name | default(omit) }}

roles/common/templates/usr/local/src/mailsystem/conf/install_postfix_advanced.conf.j2

@@ -13,8 +13,8 @@ _HOSTNAME={{ hostname }}
 _IPV4='{{ ipv4_address | default(omit) }}'
 _IPV6='{{ ipv6_address | default(omit) }}'
 _ADMIN_EMAIL=argus@oopen.de
-_SASL_AUTH=false
-_SASL_USER=
-_SASL_PASS=
-_RELAY_HOST=false
+_SASL_AUTH_ENABLED="{{ sasl_auth_enable | default('no') }}"
+_SASL_USER='{{ sasl_user | default(omit) }}'
+_SASL_PASS='{{ sasl_pass | default(omit) }}'
+_RELAY_HOST="{{ is_relay_host | default('false') }}"