Find the timeframe where 75-85% of customers would repurchase your products/services and tee up your win-back messaging around that time. Consider segmenting your dormant recipient list by high LTV vs. low LTV, high intent vs. low intent to buy, or location. Experiment with an email sequence — 2 to 5 win-back emails with time delays in between — to increase the odds the recipient will open, engage, and click through. The most effective win-back efforts are also omnichannel — start with email, follow up with an SMS, and retarget on social media.