Update reamde

README.md

@@ -14,6 +14,12 @@ Author
 - Frederic Guillot
 - License MIT
 
+Requirements
+------------
+
+- Kanboard >= 1.0.29
+- Mailgun API credentials
+
 Installation
 ------------
 
@@ -28,6 +34,13 @@ Note: Plugin folder is case-sensitive.
 Use Mailgun to send emails
 ---------------------------
 
+### Use the user interface
+
+- Set the API credentials in **Settings > Integrations > Mailgun**
+- Set the mail transport in **Settings > Email Settings**
+
+### Use the config file
+
 Define those constants in your `config.php` file to send notifications with Mailgun:
 
 ```php
@@ -44,8 +57,6 @@ define('MAILGUN_DOMAIN', 'YOUR_DOMAIN_CONFIGURED_IN_MAILGUN');
 define('MAIL_FROM', '[email protected]');
 ```
 
-You can also define the token is the application settings.
-
 Use Mailgun to create tasks from emails
 ----------------------------------------