I configured two rules in order to give to both friend and sponsor a coupon code of 5 Euro, when the Friend registered under the sponsor invitation.
Anyway, once a user types a friend email address in the front end, no mail arrives to both of them but in the back end I can see the Invitation sent.
Attached you can find the screenshots of the rules.
Here the link to the invitation page
https://www.featfood.it/ricevi
Username: user
Password: user
Thanks in advance