The majority of yahoo users don't receive emails sent from my website, despite a perfect configuration!
My website uses the mailjet service to send email notifications (for a registration or an order for example). I configured my domain name: SPF, DKIM, DMARC, Return Path, and I have a 10/10 rating on mail-tester.com. However, when I try to register on my own site with my yahoo address, I see the status notification delivered in the Mailjet statistics, and I do not receive anything on Yahoo mail, nor in spam (I even added the sender in my Yahoo contacts, but that doesn't change anything). I observe this behavior for a majority of users who use a yahoo address. What's wrong ?