How to Clean Your Email List and Stop Burning Your Sender Reputation

Every developer who's ever built a signup form has eventually faced the same ugly reality: a chunk of those collected emails is garbage . Typos. Fake addresses. Abandoned inboxes. Corporate catch-alls. Disposable throwaway domains. And when you hit "Send" on a campaign without cleaning your list first, you're not just wasting money — you're actively damaging your domain's sending reputation. Sometimes permanently. This guide walks you through why email verification matters , how it works under t