Thank you very much for your message.
This is exactly what I did. Unfortunately, even if I copy the code line in the template, when I receive the email, I can see the code line but not the corresponding information.
For example, this is a typical email I receive :
Someone just downloaded an item from your site.
User and package info:
user_email
user_first_name
Furthermore, when I look at the statistics, I can only see the IP address of the downloader but not the email address they used.
Could you please give me more instructions?