diff --git a/bin/composer-post-install-script.php b/bin/composer-post-install-script.php
index f8740d5..90ee8c7 100644
--- a/bin/composer-post-install-script.php
+++ b/bin/composer-post-install-script.php
@@ -40,6 +40,11 @@ function getEnvironment(): string
         'destination' => 'config/autoload/local.php',
         'environment' => [ENVIRONMENT_DEVELOPMENT, ENVIRONMENT_PRODUCTION],
     ],
+    [
+        'source'      => 'config/autoload/mail.local.php.dist',
+        'destination' => 'config/autoload/mail.local.php',
+        'environment' => [ENVIRONMENT_DEVELOPMENT, ENVIRONMENT_PRODUCTION],
+    ],
     [
         'source'      => 'config/autoload/local.test.php.dist',
         'destination' => 'config/autoload/local.test.php',
diff --git a/config/autoload/mail.global.php b/config/autoload/mail.local.php.dist
similarity index 83%
rename from config/autoload/mail.global.php
rename to config/autoload/mail.local.php.dist
index 02ea4af..414adea 100644
--- a/config/autoload/mail.global.php
+++ b/config/autoload/mail.local.php.dist
@@ -1,5 +1,12 @@
 <?php
 
+/**
+ * Mail configuration.
+ *
+ * Duplicate this file as `mail.local.php` and change its settings as required.
+ * `mail.local.php` is ignored by git and safe to use for sensitive data like SMTP credentials.
+ */
+
 declare(strict_types=1);
 
 $contactEmail = 'example@mail.com';