Campaign Send Error

[user28427]

I've been having issues sending campaigns all of the sudden with the below error

"We couldn't send your email due to one or more errors"

I have not received any help from Constant Contact team so I have no idea why all the sudden after more than 60 successfully sent campaigns over the past year that this error is showing up now. 

[William_A]

Hello @user28427 ,

Based on the error in your campaign's reporting, there's an issue with your self-authentication setup. We'd advise checking your account's email authentication, or reaching out to our Delivery team for further, specialized assistance.