🕵️♂️📧 The Invisible Spy Inside Every Marketing Email 👀💡
Have you ever received a marketing email and moments later, got hit with a follow-up like “Just checking if you saw my last message…”? Ever wondered...How do they know you opened it? Spoiler: It’s not magic. It’s a dead pixel — a tiny, invisible imag...
Jul 11, 20253 min read13
