Problem laravel mailgun

i put mailgun details and not sent verification mail i change .env, mail.php , services.php details and not working

.env file

APP_ENV=local WRITE_ACCESS=true APP_DEBUG=true APP_KEY=boJcZaOsxhjWreyVrYwC4XhL6zbzjlty

DB_HOST=......... DB_DATABASE=.... DB_USERNAME=.... DB_PASSWORD=......

CACHE_DRIVER=file SESSION_DRIVER=file QUEUE_DRIVER=sync

//Change Mail Configurations Below MAIL_DRIVER=smtp MAIL_HOST=smtp.mailgun.org MAIL_PORT=587 MAIL_FROM=.......gmail.com MAIL_NAME=ZBOOSTER MAIL_USERNAME=postmaster@sandbox2e34172477f34185810274592841114c.mailgun.org MAIL_PASSWORD=df1182ed8cf6e55bda6fa7a2af1a83fc

MAIL_ENCRYPTION=tls

//stripe credentials

STRIPE_API_SECRET=sk_test_DWQqcZIlkcveBmsl5IgfhCpU STRIPE_API_KEY=pk_test_FE92z9o3yzB4gQbS6agPBlfW

//paypal details

CLIENT_ID=... SECRET=.....

services.php file

?php

return [

'mailgun' => [ 'domain' => 'sandbox2e34172477f34185810274592841114c.mailgun.org', 'secret' => 'key-4ccdbbba56e709f1cf686f0ac1b3cd33', ],

'mandrill' => [ 'secret' => '', ],

'ses' => [ 'key' => '', 'secret' => '', 'region' => 'us-east-1', ],

'stripe' => [ 'model' => 'App\User', 'secret' => env('STRIPE_API_SECRET'), ],

];

mail.php file