Day-by-day warming schedule:
| Period | Daily Volume | Audience |
|---|---|---|
| Days 1–3 | 50–200 | Most engaged (opened in last 30 days) |
| Days 4–7 | 200–5,000 | Expand within 30-day engaged |
| Days 8–14 | 5,000–40,000 | Add 60-day engaged |
| Days 15–21 | 40,000–500,000 | Add 90-day engaged |
| Days 22–30+ | Full volume | Maintain consistency |
Critical rules:
- 🟢 Start with transactional email (highest engagement)
- 🟢 Don't skip days — consistency is key
- 🟢 Spread sends across the day
- 🔴 If bounces exceed 3-5%, hold or reduce volume
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