Spam Testing w/ ESP Sync in Salesforce Marketing Cloud
We ran into an error while performing Spam Test using ESP Sync within Litmus. We get the following error:
"Your credentials did not pass validation. Please try again."
We are able to see our recent emails from Salesforce Marketing Cloud (with ESP Sync) but not able to Start our test.
Note: We are able to perform ESP Sync between Salesforce Marketing CLoud and Litmus in Builder.
Thanks in advance.