Messages - Feature Guide
When a customer uses the Contact Us form on your website, their message will be in your store dashboard under:
Store—>Users —> Messages
Please note that customer's content, such as name and email, will also be added under:
Store—>Users. This is a way you can collect their emails for your Newsletter. You can find more about Creating a Custom Newsletter in our guide.
The ability to reply to Messages is in our Roadmap. If you want this feature, vote for Message Replies here!