Providers use opens, clicks, deletes, and spam reports to decide placement. Learn what engagement-based filtering means for senders.
Engagement-based filtering is when mailbox providers use recipient behavior signals to influence future inbox placement. Signals can include replies, clicks, reading time, deleting without reading, and spam reports.
This is why list hygiene matters so much. Sending to unengaged recipients drags down your overall signals and can push even good emails into spam.