"For example, an e-mail that doesn't validate the SPF and DKIM prerequisites is declared as non-compliant and is then placed in spam or deleted from inboxes."

"For example, an e-mail that doesn't validate the SPF and DKIM prerequisites is declared as non-compliant and is then placed in spam or deleted from inboxes." This is speculation presented as fact. The recipient is free to do whatever they want with the incoming emails. Most hosts just have a report-but-dont-do-anything policy because of how messy and error prone the whole SPF/DKIM thing is. "DMARC also ensures that e-mails sent from your domain name are authentic, and prevents potentially dangerous or fraudulent e-mails from being sent in your name." This it doesn't do at all. That's DKIM, which fails in a lot of spectacular ways. Barely forwarding an email can break it or make it pass when it shouldn't. I understand this is a "we'll watch your dmarc reports for you" vendor and has to exaggerate the usefulness of current practices but they are basically just the best we have and not a solution to end all email delivery issues.