'driver' => env('MAIL_DRIVER', 'smtp'),

'driver' => 'sendmail',

'driver' => 'mail',

MAIL_DRIVER=smtp
MAIL_HOST=smtp.gmail.com
MAIL_PORT=587
MAIL_USERNAME=youremail@gmail.com
MAIL_PASSWORD="password"
MAIL_ENCRYPTION=tls

php artisan cache:clear
php artisan config:cache
php artisan cache:clear

MAIL_DRIVER=sendmail

'sendmail' => env('MAIL_SENDMAIL', '/usr/sbin/sendmail -bs')

MAIL_SENDMAIL='/usr/sbin/sendmail -t -i'

MAIL_DRIVER=smtp
MAIL_HOST=localhost
MAIL_PORT=25
MAIL_USERNAME=
MAIL_PASSWORD=
MAIL_ENCRYPTION=null

php artisan config:cache