[ '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' => env('SES_REGION'), 'guzzle' => [ 'verify' => config('secure.certificates'), ], ], 'sparkpost' => [ 'secret' => env('SPARKPOST_SECRET'), 'guzzle' => [ 'verify' => config('secure.certificates'), ], ], ];