You must be logged in as a guest to contact a host. If you do not yet have an account, register for free.
Search for homestay listings using the search on the home page. Browse the results and open a listing that interests you.
Scroll down the listing page to the Contact section. Type your message in the text area and click Send.
Your message will be delivered to the host's inbox on the site, and they will receive an email notification to let them know.
When the host replies you will receive an email notification. Log in and go to your Inbox to read and respond.