In some cases, Contact form 7 does not send message data correctly. This data includes sender name, their email address or message. To fix this issue, follow these steps:
- Go to "WordPress dashboard > contact"
- Select the form that you have used in Contact form shortcode
- In form configuration tab, you can find the unique input names like screenshot below
- These input names should be used in mail configuration tab
In example above, you can fix the issue by changing [name] in mail configuration tab to [your-name].
Also you need to change [email] to [your-email].