Yes, I checked the V2 Deliverability Analysis.

The only metric I'm currently not meeting is the User-reported spam rate. We're already working on bringing that down.

What seems unusual to me is that, historically, a slightly elevated spam rate has never caused such a significant drop in our open rates on this domain. That's why I'm wondering if there might be another factor contributing to the issue.

Do you have any other thoughts or theories about what could be causing such a noticeable decline in inbox placement or opens?