Hello, I used magento contact us form to get enquiry data from customer, I need to know where data of this form get saved?
A contact form's data are not saved in the Magento 2 database.
The data are only sent by email. After the data are sent, you can see it in the email server's logs (if your email server is configured to do such logging).
What if you are still running Magento 1, is the data from an email Contact form saved then? If so, where?