contact form 7 not working

Hi sir,

my contact for 7 is not working and its shows
There was an error trying to send your message. Please try again later.

After configure easy-wp-smtp i get following error

SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting

My gmail Allow less secure apps: ON

Still not getting mail.

THANKS

REGARDS

VINAY DIXIT