Thanks to Microsoft for shielding criminal activity by blocking emails sent to "abuse@" addresses.
It protects hosting providers and administrators of platforms, sites, domains, etc., against reports of spam, phishing, and other issues sent to "abuse@" email addresses. It amounts to deliberate complicity—while victims see their lives ruined! "We couldn’t deliver your message to several recipients. A custom mail flow rule created by an administrator on nrtccoop.onmicrosoft.com blocked your message. Offensive words A mail administrator on nrtccoop.onmicrosoft.com created a custom mail flow rule that blocks messages meeting certain conditions. It appears that one or more of these conditions were met in your message. Review the text above to see a custom message from the mail administrator explaining why your message was blocked and how you can resolve the issue. For example, removing prohibited words or sending the message from a different email account might be enough to get your message delivered. If you have tried to resolve the issue without success, consider contacting the mail administrator at nrtccoop.onmicrosoft.com for guidance. Although it is unlikely that the administrator will remove or relax the rule, they may be able to tell you how to proceed to get your message delivered if it is legitimate."