Host SMTP                 smtp.hostinger.mx
Puertos SMTP (seguro)     587

MAIL_DRIVER=smtp
MAIL_HOST=smtp.hostinger.mx
MAIL_PORT=993
MAIL_USERNAME=correo@example.com
MAIL_PASSWORD=password
MAIL_ENCRYPTION=tsl

php artisan config:cache

Connection could not be established with host smtp.hostinger.mx
[Unable to find the socket transport "tsl" - did you forget to enable it
 when you configured PHP? #153217872]