Hi ,
You need to validate some steps
1) Check if you have received the email activity in Dyn CE, Go to Activities and filter by email messages (Recieved)
2) If You have received the email, the second point is validate the system job, filter by name "Rule Item"
If you don't see the email activity in Dyn CE, check the queue mailbox that should be running and you queue accept all email messages
If you see the activity, and you find in system jobs "Rule Item" check if it has an error.
Regards,
Héctor Hernández