Using the address book has the following advantages:
You can also send reminder emails to respondents who have not taken the survey.
To see the status of email addresses, click on the Edit link for the particular Email List. Then click on the Report Icon and look at the Batch Details table. Click on the numbers in the columns of the Batch Details to see email addresses. Please see images below.
Please Note : This feature may not be available to All Upgrade Levels.