diff --git a/README.md b/README.md
new file mode 100644
index 0000000..8f20082
--- /dev/null
+++ b/README.md
@@ -0,0 +1,68 @@
+# dovecot
+
+## Parameters and defaults
+
+All configuration is to be placed inside the `postfix` and `postfixmaps` dicts.
+
+
+**postfix**
+```
+# SSL settings
+ssl:
+	# path to ssl key
+	key: /etc/ssl/private/ssl-cert-snakeoil.key
+
+	# path to ssl cert with chain
+	cert: /etc/ssl/certs/ssl-cert-snakeoil.pem
+
+	# For this settings see http://www.postfix.org/postconf.5.html#smtpd_tls_security_level
+	# but normaly there is no reason to change it from "may"
+	# Please not this settings apply to smtp only, not to submission
+	outgoing_security_level: may
+	incoming_security_level: may
+
+# Enable opendkim integration
+enable_opendkim: false
+
+# Enable the submission port (needed to send mail by clients)
+enable_submission: false
+
+# Size limit of messages in bytes, default is ~20MB
+message_size_limit: 20480000
+
+# See http://www.postfix.org/postconf.5.html#relay_transport
+# normaly you do not need to change this
+relay_transport: smtp
+
+# See http://www.postfix.org/postconf.5.html#relayhost
+# only set if this host should be a relay
+relayhost: ''
+
+# See http://www.postfix.org/postconf.5.html#relay_domains
+relay_domains: []
+
+# See http://www.postfix.org/postconf.5.html#sender_dependent_relayhost_maps
+# If set, this should point to a file which is a postfixmap
+sender_dependent_relayhost_maps: ''
+
+# See http://www.postfix.org/postconf.5.html#virtual_alias_maps
+# Maps mail addresses to user
+virtual_alias_maps: ''
+
+# list of domains we have mailboxes for, see http://www.postfix.org/postconf.5.html#virtual_mailbox_domains
+virtual_mailbox_domains: []
+
+# networks to relay mail from without user authentication
+mynetworks: []
+
+# currently ignored
+mydestination: []
+```
+
+**postfixmaps**
+```
+# Should be '<path>': *mapddict*
+# for Example:
+postfixmaps:
+  "/etc/postfix/virtual":
+```
diff --git a/defaults/main.yml b/defaults/main.yml
index 8329cf5..0629124 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -5,6 +5,7 @@ postfix:
     outgoing_security_level: may
     incoming_security_level: may
   enable_opendkim: false
+  enable_submission: false
   message_size_limit: 20480000
   relay_transport: smtp
   relayhost: ''
@@ -14,3 +15,5 @@ postfix:
   virtual_mailbox_domains: []
   mynetworks: []
   mydestination: []
+
+postfixmaps: []
diff --git a/tasks/main.yml b/tasks/main.yml
index b76f725..d3cd553 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -25,6 +25,6 @@
   template:
     src: maps.j2
     dest: "{{ item }}"
-  with_items: "{{ postfixmaps|d([]) }}"
+  with_items: "{{ postfixmaps }}"
   notify:
   - restart postfix
diff --git a/templates/master.cf.j2 b/templates/master.cf.j2
index 36909cc..3f0a794 100644
--- a/templates/master.cf.j2
+++ b/templates/master.cf.j2
@@ -14,7 +14,7 @@ smtp      inet  n       -       y       -       -       smtpd
 #smtpd     pass  -       -       y       -       -       smtpd
 #dnsblog   unix  -       -       y       -       0       dnsblog
 #tlsproxy  unix  -       -       y       -       0       tlsproxy
-{% if "submission" in postfix and postfix.submission %}
+{% if postfix.enable_submission %}
 submission inet n       -       y       -       -       smtpd
   -o smtpd_relay_restrictions=permit_sasl_authenticated,reject
   -o smtpd_tls_security_level=encrypt