You should now be able to start testing. Try using the `/admin/email` "Send Test Email" and then view the "Sent" or "Skipped" etc. tabs. You should see a report on what happened with the email. You may also want to look in `/var/www/discourse/log/production.log` as well as `/var/www/mail.err`. You should perhaps also use [Rainloop](https://github.com/YunoHost-Apps/rainloop_ynh) or another Yunohost email client application to quickly test that both your user and the dedicated Yunohost Discourse user (`response@...`) is receiving mail.
You should now be able to start testing. Try using the `/admin/email` "Send Test Email" and then view the "Sent" or "Skipped" etc. tabs. You should see a report on what happened with the email. You may also want to look in `/var/www/discourse/log/production.log` as well as `/var/www/mail.err`. You should perhaps also use [Rainloop](https://github.com/YunoHost-Apps/rainloop_ynh) or another Yunohost email client application to quickly test that both your user and the dedicated Yunohost Discourse user (`response@...`) is receiving mail.