How does Yahoo Mail filter messages?

Yahoo Mail filters messages using a combination of reputation analysis, authentication verification, and user behavior signals.

Sender reputation at Yahoo is tracked through sending IP and domain history. Yahoo maintains extensive databases of sender behavior. Their Complaint Feedback Loop is well established and widely used.

Authentication is required for bulk senders. Yahoo participated in creating DMARC and enforces authentication requirements for large senders.

User engagement influences filtering. Yahoo tracks how recipients interact with mail from each sender and uses this data in placement decisions.

Yahoo's filtering applies to both Yahoo Mail and AOL Mail since the properties merged. What works for one works for both.

Yahoo values authentication and engagement. Meet their requirements and earn user attention, and the inbox opens.