We are proud to announce that a new version of the Direct Inquiry add-on for CS-Cart v4 editions was released.
We realized that if the visitor entered a Yahoo or Hotmail email address to ask something, the store admin or vendor using one of the following email providers: Yahoo, Hotmail or Gmail didn't receive the email with the request. This was caused by the DMARC policies introduced by these email providers. With this update we have fixed this error.
More info: Direct Inquiry v4