Support more mail drivers

config/mail.php

@@ -107,6 +107,6 @@ return [
     |
     */
 
-    'sendmail' => '/usr/sbin/sendmail -bs',
+    'sendmail' => menv('SENDMAIL_COMMAND', '/usr/sbin/sendmail -bs'),
 
 ];

config/services.php

@@ -0,0 +1,48 @@
+<?php
+
+return [
+
+    /*
+    |--------------------------------------------------------------------------
+    | Third Party Services
+    |--------------------------------------------------------------------------
+    |
+    | This file is for storing the credentials for third party services such
+    | as Stripe, Mailgun, Mandrill, and others. This file provides a sane
+    | default location for this type of information, allowing packages
+    | to have a conventional place to find your various credentials.
+    |
+    */
+
+    'mailgun' => [
+        'domain' => env('MAILGUN_DOMAIN'),
+        'secret' => env('MAILGUN_SECRET'),
+        'guzzle' => [
+            'verify' => config('secure.certificates')
+        ],
+    ],
+
+    'mandrill' => [
+        'secret' => env('MANDRILL_SECRET'),
+        'guzzle' => [
+            'verify' => config('secure.certificates')
+        ],
+    ],
+
+    'ses' => [
+        'key' => env('SES_KEY'),
+        'secret' => env('SES_SECRET'),
+        'region' => menv('SES_REGION'),
+        'guzzle' => [
+            'verify' => config('secure.certificates')
+        ],
+    ],
+
+    'sparkpost' => [
+        'secret' => env('SPARKPOST_SECRET'),
+        'guzzle' => [
+            'verify' => config('secure.certificates')
+        ],
+    ],
+
+];