For my last few bookings from AirBnB, the guest platform email is not being populated.
This has caused my automated messages not to be sent.
Is anyone else having this problem?
Yes, this is normal, because unfortunately, Airbnb turned off their proxy email system last month. The only way to communicate with Airbnb guests initially is via their own Airbnb internal messaging system. Fortunately, OwnerRez integrates with this system, so, you can configure OwnerRez to send a request to Airbnb guests to sign your rental agreement. That signing process, in turn, collects the guest's real email address, which can be used thereafter as with any other booking.
Here's general guidance:
In particular the green box: