I'm using Gravity Forms and the Sandbox account to test transactions. When I submit a transaction I don't see any errors, and Gravity Forms logs the transaction as successful with a transaction ID of 0. However, I am not getting any email receipts, either as a merchant or as a customer.
I checked my account settings and email receipts is on, and I've used this same account successfully for another project back in October. Not sure where the problem is occurring.