With this tool you can generate a link that you send to the user and when they click on it an email with the IP will be send to your email:
Virus Total:
https://virustotal.com/en/file/6a54fdf8547a14d88c94273fd5199d6517c28cfe476a4a521e055bbbdfa1a95c/analysis/1501373756/
Virus Total:
https://virustotal.com/en/file/6a54fdf8547a14d88c94273fd5199d6517c28cfe476a4a521e055bbbdfa1a95c/analysis/1501373756/