High open rates can mean your emails are landing in spam

High open rates can mean your emails are landing in spam

Popular belief: rising open rates mean your subject lines are winning.

Myth. Apple Mail Privacy Protection and spam-filter bots pre-open your emails to scan them, inflating opens for messages no human ever saw. A 70% open rate next to a 0% reply rate isn't a great hook — it's a filter farm reading your mail.

It's not engagement, it's machines. Stop tuning subject lines off a metric robots corrupted. Replies and clicks are the only opens that prove a person was there.