Until now, a recipient with a formatted email like 'John Doe <john_doe@example.com>' could be reached by email even if its email address was blacklisted. Now when sending a mass mail using the composer, the email is sanitized before comparing it to blacklist entries. This commit is related to task ID 33224 (original blacklist implementation done for v12) and its PR #25966 as well as task ID 1889703 (tests and fixes) and its PR #27330. Done with collaboration of @dbeguin.