Go to Settings → Website enquiry form and tick Take enquiries through the form. Choose who gets the new leads and, if you like, your own thank-you message, then Save.
Put it on your website in one of two ways:
- Link to it: copy the link and add it to a "Contact us" button.
- Embed it: copy the embed code onto a page of your website. If your website host blocks embedded forms, use the link.
Each enquiry becomes a lead (source: Website), and the person you chose is notified straight away. An open lead with the same email isn't added twice, and automated spam is quietly dropped.