There is no need to update anything in config/mail.php. just put you credential in .env with this specific key's. This is my .env file.
MAIL_DRIVER=smtp
MAIL_HOST=smtp.gmail.com
MAIL_PORT=587
[email protected]
MAIL_PASSWORD=********
MAIL_ENCRYPTION=tls
I had the same issue after long time debugging and googling i have found the solution. that by enabling less secure apps. the email started working.
if your gmail is secure with 2 step verification you can't enable less secure app. so turn off 2 step verification and enable less secure app. by click here enable less secure apps on your gmail account