Nelio A/B Testing might send some email notifications when certain events occur. You can specify if you want to be notified when an experiment starts or when it stops, when there is less than 20% of quota remaining, and when you run out of quota.
Just configure this by going to the Settings of Nelio A/B Testing and use the field to specify the email(s) that should receive notification emails. Remember to write one email per line.
Also, check the notification emails you want to receive from the list.