Hi Stefano,
If you mean email notifications, you would have to set up cron jobs to send out email notifications from your site.
You can refer to this list of
guides on how to set up cron jobs depending on which cron job service you use. If you use Cpanel, they have cron job service as well.
In your EasyDiscuss backend, you need to configure your email notification settings under
Settings>Notifications>E-mails(
http://take.ms/5GOEO).
You also need to configure your mail settings in Joomla's
Global Configuration>Server>Mail Settings page(
http://take.ms/RoMAc). The email sender address here needs to be the same as the one in ED email notification settings for this to work. Your mail settings info can be obtained from your web hosting provider. You can click on the
Send Test Mail button to see if your mail settings are correct.
Let us know if you have any other issues in this process.