Many clients ask why respondent e-mail addresses are not automatically captured when a survey is taken.
The answer is that e-mail addresses do not lie around in the browser or the Internet and can only be reported by you or the respondent.

E-mail addresses can only be captured if one of the following is used:

(1) You Request: Add a question that requests respondents enter their e-mail address.

(2) Use the Address Book: The address book feature available to professional accounts allows you to enter e-mail addresses into the address book. A special code identifying respondents is automatically attached to the survey invitation, thereby enabling tracking.

(3) Special Codes are used as part of your corporate mail delivery system to attach an identification code (such as a customer id number) from your database to the survey. This identification code is then transferred to the survey database when the survey is completed.
For more information about using special codes see:  
For special code examples generated for your survey see (requires login):   

Respondents cannot be tracked anonymously and can only be tracked only with special codes that identify respondents and match them to the e-mail names already contained within a database.