Broadcasting high-volume campaigns from a fresh dedicated IP address without a historical warmup triggers automated rate-limiting and junk folder placement. Reputation must be built systematically.
1. 30-Day Logarithmic Warmup Schedule
| Warmup Stage | Daily Sending Volume | Target Audience Segment | Expected Inbox Rate |
|---|---|---|---|
| Days 1 – 3 | 500 – 1,000 / day | 30-Day Highly Engaged Subscribers (Opens > 50%) | 99.5%+ |
| Days 4 – 7 | 2,500 – 5,000 / day | 60-Day Active Subscribers | 99.0%+ |
| Days 8 – 14 | 10,000 – 25,000 / day | 90-Day Active Subscribers | 98.5%+ |
| Days 15 – 21 | 50,000 – 100,000 / day | Broad Subscriber Base | 98.0%+ |
| Days 22 – 30 | 250,000+ / day | Full Production Volume | 98.0%+ |