How are your PHP skills?
Once you have the information required to select the image (e.g. from the user's responses on the form), here's how you proceed:
So, it would look a little like this:
- A PHP script takes a standard template and changes the "img" tag to point to the right image; it copies that template to the template directory under a new name (a temporary file).
- It calls FormMail and specifies that new temporary file as the template to use for the HTML email.
- It removes temporary files older than some hours (auto cleanup).
FormAll quite easy to do, but you need to be a bit of a programmer.
PHP Preprocess script -> creates temporary template