Hi Matthew,
Unfortunately MyVR doesn’t support messaging without an associated inquiry. You can turn any Other message into an inquiry to enable messaging. When converting an Other message into an inquiry, you need to select a property and enter a number of adults. The first name, last name, and renter email fields are also required, but they should automatically be filled for you.
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Everything else can be left blank, and all inquiry information can be editted later using the Modify Inquiry option on the inquiry detail page.
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Best,
Danny