Here are a few indicators that you might be over segmenting your email list:
Minimal Impact: If your segmentation efforts aren't yielding significant improvements in engagement or conversion rates, it might be a sign of over segmentation. Low Engagement: When segments are too small, you might notice a drop in overall engagement metrics. High Effort, Low Return: If you're spending a lot of time managing segments without seeing a proportional return on investment, reconsider your approach.