In my Q2A, viewers can ask question without registering in the website.
Now I want the email address to be required in the following box in the ask a question page:
Email me at this address if my question is answered or commented on:
Welcome to the Q&A site for Question2Answer.
If you have a question about Q2A, please ask here, in English.
To report a bug, please create a new issue on Github or ask a question here with the bug tag.
If you just want to try Q2A, please use the demo site.