Yes, it is the Contact Us form. When a customer sends a message through that form, in 1.2.15 I would receive two emails: one that was a notification telling me that a customer had sent an enquiry, and then a second that would be the text of the enquiry PLUS the email address of the person who sent it, to which I could reply. Since installing 1.2.16, I receive only the email telling me that a customer made an enquiry, but not the text of the enquiry or the customer email.
I am attaching an image of my Contact Us screen. And also a text file of an "Enquiry received" email.
Again, to be clear, Abantecart is capturing the enquiry made through the contact us form, and I can read them by going to my dashboard and then going to messages. The Contact Us form is collecting and storing the Enquiry, but it is not sending the content of those enquiries to my linked email address. But having the enquiries forwarded to my email makes answering them much easier, and a much less time consuming process also, and, to repeat, it did send them in 1.2.15.