I am trying to create a phishing email for a project I am on. In the email I want to link to a site that will collect IP, browser, date/time of when visited. nothing malicious but to just prove that users clicked the link. 
Can I do this in social engineering toolkit or is it not possible?
There are several ways:


Proxy headers, such as X-Forwarded-For and X-Client-IP, can be added by non-transparent proxies.
Active proxy checking can be used - the target server attempts to connect to the client IP on common proxy ports (e.g. 8080) and flags it as a proxy if it finds such a service running.
Servers can check if the request is coming from an IP that is a known proxy. WhatsMyIP probably has a big list of these, including common ones like HideMyAss.
Web client software (e.g. Java applets or Flash apps) might be able to read browser settings, or directly connect to a web service on the target system (bypassing the proxy) to verify that the IPs match.
Mobile app software can identify the client IP. Example: PhoneGap plugin

