One-time transactions processing but no customer email receipts received

Transactions are submitting to Auth.net successfully and being processed. Merchant email receipts are being received but the customer email is not. I have GF set to let Auth.net send the receipt. The emails are not in spam either. I know the email from the customers submitting the form is being receivd because I see it in the transaction reports.

I called Auth.net and they were able to process two test transactions that successfully sent me the customer email receipt.

Any ideas where else i can check within GF to verify settings? Where in the code of GF can I verify the setting to let Auth.net send the email receipt.

Thanks for any help in advance.

I am having a similar issue. I send a priority ticket in and will handle it that way but i would like this add-on as well. Will you send it to me too Chris? i just sent you an email about getting v1.3.1 of the Auth.net plugin you can send this add-on to the same email.

Thanks!