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Error when importing subscribers with the domain

Knowledge Article Number 000221632
An import of subscribers with the domain returns the following error: 
"Error Code: 24 - Subscriber was excluded by List Detective."
The domain is present on our List Detective at the request of Comcast postmasters. This domain is their corporate/internal domain and should not be used for commercial emails in accordance with the policies of their postmaster team.  Customers with a business relationship with Comcast may have success in sending to their corporate domain, but should any blocking occur the Salesforce Support is unable to assist.

If you have a business relationship with Comcast and need to perform Sends to this domain, List Detective may be customized in your account to allow for the import of the domain to your account.  For help with this, please contact Salesforce Marketing Cloud Support.

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