I didn’t notice that there was a special question type just for email addresses, this would have been helpful as people are entering in their email addresses incorrectly sometimes. Now that we are about to send out a reminder for the survey, I would like to update this question from a textbox question to an email question. Will that break the survey?
Possibly. To be safe I would recommend adding a new email address question and disabling the previous textbox question prior to sending the reminder message.