I've just purchased some credits for email campaigns and, when I try to send the email, I get an error message saying that my "sendgrid identity cannot be verified". I have searched but cannot find any details on how I set up a sendgrid identity.
You should receive an email direct from Send Grid which will give you the instructions. Please check your emails for that, it may be in spam?? If not received by tomorrow let us know and we will chase it