How do I analyze cart abandonment specific to my email capture campaigns?

As an e-commerce store owner, I've been struggling to understand why potential customers start our email capture campaigns but never complete their purchases. Every month, I see hundreds of visitors enter their email for a discount, but only a tiny fraction actually convert. It's incredibly frustrating because these are warm leads who've already shown interest by providing their contact information. I know these abandoned carts represent real revenue opportunity, but I can't seem to pinpoint exactly where and why they're dropping off. My current analytics tools give me fragmented data – some show email capture rates, others show cart abandonment, but nothing provides a holistic view of what's happening between those two critical moments. I'm spending good money on driving traffic and creating enticing email capture offers, but without understanding the nuanced drop-off points, I'm essentially throwing marketing budget into a black hole. I need a solution that can track these interactions comprehensively, show me precise conversion bottlenecks, and help me understand the specific behaviors of users who start but don't complete their purchases.