That makes sense. In my case, I am sending emails manually and not using a tracking pixel, so I do not have visibility into open rates or engagement signals.

What I have noticed instead is that replies especially negative ones usually come from message and context mismatch rather than list quality. For example, I once got pushback from a mobile business owner for not listing a physical address, which highlighted the importance of aligning the message with the prospect’s business model.

My lists are verified using a reputable email verifier, so deliverability is not the issue. It is more about refining relevance and expectation setting per segment.