I am trying to: Send toolset user form email notifications from the site when a new user registers.
Link to a page where the issue can be seen: hidden link (this is where the form is filled/ submitted).
I expected to see: Emails coming into the inbox when the registration form was submitted.
Instead, I got: Google blocking the email notifications because they are not RFC compliant. We reviewed with Google, who says the issue is "550-57.1 duplicate headers", even though only one recipient is entered. We have tried adjusting the form Notification e-mail body and other settings, but they still are not coming through.
I have attached a screenshot of the notification settings. We also tried stripping back the notification email body and disabling all other notifications, but none of these steps resolved the issue. Please let us know if you need any additional information.
Thanks again; your support is greatly appreciated!