Gmail Error

I have updated my CS_cart as required by [url]CS-Cart Documentation — CS-Cart 4.16.x documentation

and change SMTP Settings in my CS_Cart but still not able to send any mail via SMTP in cs-cart.

please help, am I missing something.

This could be caused by server security settings

If your host is using ConfigServer Firewall (csf) they will need to deactivate the following setting in its config before you can use external SMTP servers.