Email deliverability relies on proper IP warming to build a strong sender reputation. This guide details an automated IP warming process starting at 50 emails/day, gradually increasing to millions over weeks, with real-time monitoring and safeguards. Best practices include targeting engaged users, maintaining consistent volumes, and monitoring metrics. Support is provided to optimize performance and ensure long-term email success.
Email deliverability is crucial for your business success, and proper IP warming is a fundamental step in establishing a strong sender reputation. This guide explains our automated IP warming process and provides best practices for optimal results.
How Our Automated IP Warming Works
Our system implements a carefully calibrated process that follows SendGrid's best practices while automatically managing your email volume to maintain optimal deliverability:
Initial Phase
Starting volume begins at 50 emails per day
System monitors delivery metrics in real-time for each IP/domain combination
Automatic overflow handling between warming IPs during volume spikes
Built-in safeguards automatically adjust sending speeds if delivery issues arise
Volume Progression
Gradual increase over 3 weeks based on performance metrics
By week 3, your IP should handle up to 1,000,000 emails per day
Automated throttling kicks in if sudden volume spikes or drops are detected
Sending automatically stops if bounce rates exceed 3%
Detailed Warmup Schedule
Day | Number of Daily Emails |
|---|---|
1 | 50 |
2 | 100 |
3 | 250 |
4 | 500 |
5 | 1,000 |
6 | 2,500 |
7 | 5,000 |
8 | 7,500 |
9 | 10,000 |
10 | 15,000 |
11 | 20,000 |
12 | 30,000 |
13 | 40,000 |
14 | 55,000 |
15 | 70,000 |
16 | 100,000 |
17 | 150,000 |
18 | 250,000 |
19 | 300,000 |
20 | 400,000 |
21 | 500,000 |
| 22 | 600,000 |
| 23 | 700,000 |
| 24 | 800,000 |
| 25 | 900,000 |
| 26 | 1,000,000 |
| 27 | 1,350,000 |
| 28 | 1,800,000 |
| 29 | 2,400,000 |
| 30 | 3,200,000 |
| 31 | 4,250,000 |
| 32 | 5,600,000 |
| 33 | 7,500,000 |
| 34 | 10,000,000 |
Important Notes:
If you know who your most engaged users are, it is typically best practice to segment email lists from most to least engaged recipients. You can then begin sending to your most engaged segments first. It is in your best interests to avoid expanding to less engaged audiences until performance is healthy enough to merit such an expansion. Otherwise, you might run into or exacerbate existing performance issues.
Warm up schedules can vary greatly depending on a number of factors including: list age, list hygiene, spam reports, user engagement, content, and domain distribution. The warm up schedule above is meant to serve as a generic guide and using it does not guarantee success.
Recommended Sending Strategy During Warming
Weeks 1-2 (Early Warming Phase)
Consolidate multiple daily campaigns into 2-3 sends
Target only highly engaged subscribers (clicked within last 30 days)
Maintain minimum 4-hour spacing between sends
Recommended sending times: 9am, 1pm, and 5pm
Utilize timezone-based sending to spread out delivery
Week 3 (Later Warming Phase)
Gradually return to your normal sending cadence
- Target engaged subscribers (clicked or opened within last 60 days)
Maintain minimum 1-hour spacing between sends
Keep sending patterns consistent
Continue monitoring engagement metrics
Best Practices for Success
Maintain Consistent Volumes: Sudden spikes or drops can trigger automated adjustments
Focus on Engagement: Higher engagement rates during warming help establish strong IP reputation
Monitor Metrics: Keep an eye on delivery statistics and bounce rates
Be Patient: The 3-week warming period is essential for long-term deliverability success
What to Expect
Our system automatically handles volume management
Real-time monitoring and adjustments ensure optimal delivery
Automated safeguards prevent reputation damage
Progressive volume increases as your IP establishes reputation
Support and Monitoring
Our team actively monitors the warming process and will:
Track delivery metrics across all IPs and domains
Make necessary adjustments to ensure optimal performance
Alert you of any significant issues or required actions
Provide guidance for maintaining good sender reputation
Remember that proper IP warming is not just a technical process - it's an investment in your email program's long-term success. Following these guidelines helps establish a strong sender reputation that will benefit your email deliverability for years to come.