The error "Subscriber was excluded by List Detective" occurs when List Detective blocks certain Domains or Usernames. When this happens, all email addresses that contain those domains or usernames cannot be imported or sent to from the Marketing Cloud.
To allow these email addresses, enable Custom List Detective (using the instructions below) and our internal team will add the Domains or Username affected as an exception in the Custom List Detective feature.
Enable Custom List Detective
1. Log a Case with Salesforce Marketing Cloud support.
2. In your case comments, include the following details:
000382509

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