From 4064380eb865800a4ed53c93fecbcef75e2c2060 Mon Sep 17 00:00:00 2001
From: Rich Lott <artfulrobot@users.noreply.github.com>
Date: Thu, 3 Jan 2019 11:12:45 +0000
Subject: [PATCH] Update README.md

---
 README.md | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 767a1da..be84293 100644
--- a/README.md
+++ b/README.md
@@ -59,7 +59,7 @@ Nb. the API key is *not* your Mailgun password (nor your domain's SMTP
 password). You can find it on the page for your domain on the Mailgun admin
 interface.
 
-Once you've got it, visit the settings page at:
+**CiviCRM 5.8+ users can** visit the settings page at:
 
 - Drupal 7: `https://example.com/civicrm/mailgunny/settings`
 - Wordpress: `https://example.com/?page=CiviCRM&q=civicrm/mailgunny/settings`
@@ -67,6 +67,12 @@ Once you've got it, visit the settings page at:
 
 Put it in the box and press Save.
 
+**CiviCRM 5.0 - 5.7 users** must instead define a constant in their `civicrm.settings.php` file like this:
+
+```php
+define('MAILGUN_API_KEY', 'xxxxxxxxxxxxxxxxx');
+```
+
 Right, you're all set.