A warmup schedule is your roadmap for building sender reputation. The right schedule balances growth speed with reputation safety. Here is a proven approach.
Standard 8-Week Warmup Schedule
| Week | Daily Volume | Weekly Total | Subscriber Segment |
|---|---|---|---|
| 1 | 200 | 1,400 | Most engaged (opened in last 30 days) |
| 2 | 500 | 3,500 | Recent engagers (60 days) |
| 3 | 1,000 | 7,000 | Engaged subscribers (90 days) |
| 4 | 2,500 | 17,500 | Active subscribers (6 months) |
| 5 | 5,000 | 35,000 | Expand if metrics healthy |
| 6 | 10,000 | 70,000 | Most of active list |
| 7 | 20,000 | 140,000 | Full active list |
| 8 | Target volume | Target | Normal sending |
Also in this series
- For the method behind the schedule and how to adapt it, see How Do I Warm Up a New Email Domain or IP?.
- For how long the whole process takes at your volume, see How Long Does Email Warmup Take?.
- For the daily numbers and growth rates in detail, see How Many Emails Should I Send During Warmup?.
Schedule Principles
Start Small
Begin with 200-500 daily emails, even if your target is millions. This establishes a baseline of good behavior before providers see significant volume.
Increase Gradually
Increase volume by 25-50% per step (daily or weekly, depending on your pace). Sudden jumps trigger spam detection.
Best Subscribers First
During warmup, send only to subscribers most likely to engage:
- Recent purchasers or active users
- Opened email in last 30 days
- Clicked email in last 60 days
- Subscribed recently (last 90 days)
Engaged recipients generate positive signals that accelerate warmup.
Consistent Daily Sending
Send every day during warmup. Consistent patterns build trust faster than sporadic bursts.
Adapt to Your Situation
This schedule is a starting point. If you have excellent engagement rates, you may increase faster. If you see any problems, slow down. Metrics determine the pace, not the calendar.
Metrics to Monitor
At every stage of the schedule, check bounce rate (under 2%), complaint rate (under 0.1%), inbox placement via seed tests, deferrals, and open and click rates. Green means increase, yellow means hold volume for another period, and red (bounces over 2% or complaints over 0.1%) means stop and diagnose. The full monitoring setup, including which tools to use, is in How Do I Warm Up a New Email Domain or IP?.
Provider-Specific Considerations
Gmail
Gmail is typically the most sensitive to new senders. Consider warming up Gmail recipients separately and more slowly if they represent a large portion of your list.
Microsoft (Outlook, Hotmail)
Microsoft may defer messages during warmup. This is normal throttling. Do not retry aggressively; let their suggested retry intervals guide you.
Yahoo
Yahoo generally warms up similarly to Gmail. Monitor their specific feedback via their postmaster tools.
Do Not Skip Steps
It is tempting to accelerate when things go well, but reputation systems need time. A week at each volume level is not just about sending mail; it is about giving providers time to evaluate your behavior.
After Warmup Completes
Keep sending patterns consistent, avoid volume spikes above 30%, keep monitoring, and warm up again after any long pause. What to expect once warmup ends is covered in How Long Does Email Warmup Take?.