The members of my community are saying that they area receiving a lot of emails with notification. Where I can see what is sending?

There is nowhere you can see a list that is sent out, but if your users are receiving too many emails of notifications, the answer would be to adjust their email notifications accordingly. They can do this by selecting their name>account setting>notification settings, and adjusting accordingly.

If they want to stop them altogether, there is a button on the bottom right of that page to stop all email notifications.

Have any place that I can see what notification is sending by the group? Example: members recive email notification in this and this case.

Probably this can help

I understand, but I'm not talking about the emails that have already been sent. I want to define what will be sent forward here, for example, if the user is mentioned, whether or not he should receive this email notification, you know?