Level: Advanced
Modern spam filtering weighs recipient engagement heavily alongside technical authentication, meaning strong technical setup alone doesn't guarantee inbox placement if engagement signals are weak.
Engagement Signals Include Opens, Clicks, and Deletion Patterns
How recipients interact with your mail — or consistently ignore and delete it unread — feeds into filtering decisions independently of whether your authentication is properly configured.
Technical and Engagement Signals Compound Each Other
Strong authentication with poor engagement, or strong engagement undermined by authentication gaps, both produce worse outcomes than when both factors are solid simultaneously.
Sunsetting Unengaged Recipients Protects Overall Deliverability
Removing or reducing send frequency to consistently unengaged recipients, even though it shrinks your list, tends to improve engagement rates and, by extension, deliverability for your remaining active audience.
Next step: Use the Domain Authority Checker to check your domain's current reputation trend as an indirect signal of how engagement and technical factors are combining.