How Email List Inflation Hurts Deliverability and Revenue

The Email Marketing Podcast with Fexingo: Newsletters, Open Rates, and Subscriber Growth · Aug 23, 2026 · 6m · transcript

In this episode, Lucas and Luna revisit the hidden cost of a bloated email list. They explain why buying or renting email lists to boost subscriber counts can backfire, hurting deliverability and revenue. Using a concrete example of a fitness apparel brand, they show how a 40 percent jump in list size led to a 22 percent drop in open rates and a 15 percent dip in sales. Lucas breaks down the mechanics of ISP filtering and spam complaints, while Luna shares a quick fix using list validation and sunset rules. They also discuss smarter ways to grow a list organically, like using lead magnets and…