diff --git a/README.md b/README.md
index 66ca771..40685a0 100644
--- a/README.md
+++ b/README.md
@@ -7,3 +7,25 @@ Use this role to setup a Postfix mail server. It comes with the following additi
 - Fail2ban
 - optional: [OnionMX](https://github.com/ehloonion/onionmx)
 - optional: Unbound
+
+
+## Variables
+
+### Scope: misc
+
+| Variable | Value | Default | Note |
+|--|--|--|--|
+| `unbound_install` | bool | | `True` if you whish to install unbound |
+| `postfix_onionmx` | bool | | `True` to setup OnionMX delivery |
+| `postfix_mydestination` | List | | List with hostnames |
+| `postfix_mynetworks` | List | | List with network addresses |
+
+### Scope: submission
+
+| Variable | Value | Default | Note |
+|--|--|--|--|
+| `postfix_submission` | bool | | Set `True` to configure submission port settings |
+| `postfix_submission_smtpd_tls_cert_file` | string |  |Path to TLS cert file |
+| `postfix_submission_smtpd_tls_key_file` | string | | Path to TLS key file |
+| `postfix_submission_non_tls_port` | int | | Port number for an additional (internal) submission port without TLS |
+