Previously, Airbnb provided email aliases for all guests - something like [email protected]. However, this email alias feature has been discontinued on 30th September 2023.
If you relied on this feature, on Uplisting, you can still send a message to the guest via the Inbox (or the messages tab). This sends through the Airbnb messaging via API.
You can find more information about this update here: https://www.airbnb.co.uk/resources/hosting-homes/a/an-update-for-hosts-who-use-the-email-alias-feature-195
Updated 4 months ago