I am new to AbanteCart and recently installed v.1.2.8. No IM drivers installed.
When using default_authorizenet_aim (or similar payment extensions) when creating an order with a registered user, the function update is called to add the gateway's response to the order's comment, but the function update calls the function send, which sends a blank IM email message to the user with the subject store name Notification. No email should be sent to the user.
See attachment.