Why don't they send DMARC reports?
Every little podunk email provider seems to be able to send me DMARC reports, as well as Microsoft, Yahoo!, Gmail, Xfinity, and AOL. Every morning I get a pile of them. But never a peep from Apple.
They like to reject our email for inscrutable reasons. We don't send bulk email. We only send email (almost entirely transactional) to about 5,000 paying customers who have accounts on our website.
Two days ago I was however delighted to receive a reply to an email I had sent to them on May 1 asking for assistance and clarification on why they block us. They told me that the website of one of my wife's employers (not our website or domain), featured in her email signature, was hosting malicious software. It isn't on any blocklists and I can't find any evidence of this currently being the case. Maybe it did at one point and they cleaned it up? I suspect Apple blocks and never revisits if the reason is still valid.