IP Warmup Strategies for Email Deliverability Success
Proper IP warmup is critical when starting with a new sending IP. Here is how to do it right.
Why IP Warmup Matters
New IPs have no sender reputation. Without gradual warmup:
- Emails go to spam
- Bounce rates spike
- Reputation gets damaged
Recommended Schedule
Week 1: Foundation
- Day 1-2: 50-100 emails/day
- Day 3-4: 200-500 emails/day
- Day 5-7: 1,000-2,000 emails/day
Week 2: Growth
- Day 8-10: 5,000 emails/day
- Day 11-14: 10,000-20,000 emails/day
Week 3-4: Scale
- Gradually increase to 50% of target
- Monitor bounce rates closely
Best Practices
- Send to engaged recipients first
- Monitor complaints - keep below 0.1%
- Watch bounces - remove invalid addresses
- Warmup gradually - never skip levels
PostMTA Warmup Tools
PostMTA includes automatic IP warmup:
- Gradual volume ramping
- Bounce tracking
- Reputation monitoring
Get started: https://postmta.com
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