I've read about the possibility to include a link in the user reply email with a link to a file on the server and it's ok.
Problem is that I'd like to send an email with an attachment since, if I make machform send the email with link, the user can send this email to another user that can see the link and download the file but I have the need to control who has the file (a pdf in my case).
Sure the user can take the pdf and send it to another user but this is more difficult that send him an email with a link.
There's no way to attach a pdf to the email the machform send to the user that has filled a form?