How Email List Co-Registration Doubles Growth

The Email Marketing Podcast with Fexingo: Newsletters, Open Rates, and Subscriber Growth · Jul 9, 2026 · 10m · transcript

Lucas and Luna explore co-registration — a subscriber-growth tactic where a brand partners with a complementary service to offer a joint sign-up. Lucas explains how a travel newsletter used co-registration with a luggage brand to add 12,000 subscribers in six months, with a 34 percent open rate on the co-reg cohort versus 28 percent for organic. Luna questions the risk of low-intent subscribers and Lucas shares how the right opt-in design and a two-step confirmation filter out the wrong people. They also discuss legal compliance under GDPR and CAN-SPAM, the difference between co-registration…