In Q2A version 1.4 you can check 'Check email notification box by default:' option at 'Posting' section, Admin.
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.