Hello @CarolS5320 ,   According to our Compliance/Delivery team, your issue is more tied to the authenticated address' sending reputation. The only true "fix" is to continue sending without getting large numbers of spam/unsubscribes, and to give your reputation time to increase.    If you have further questions regarding this, I'd advise speaking with the Delivery team directly.  ... View more

Hello @DeirdreS122 ,   Please call our general support so they can troubleshoot the issue live, and confirm where in your account the erroneous spaces are so they can work to remove / edit them. ... View more