Hi Paula,
I was told that:
'it would appear that the messages are not visible in your inbox due the new moderated messages policy. I noticed that what both messages from the guests have in common is that they mentioned locations. For example, Jono mentioned the Jurassic coast and Wendy mentioned travelling down to Came House from Sussex. Based off my checks, the messages may have been removed because they mentioned locations in the details.'
So all I can do, it seems, is keep a close check on my personal email, where I can see the original messages.
I can understand the messages being blocked if I type a phone number or a web link (though occasionally guests ask for taxi firms' details prior to visiting and I don't like telling them to Goggle it!), but so many of my guests tell me where they're coming from or wishing to visit, so the 'new moderated messages policy' is pretty annoying!