Email's Auto IP Warm-up system operates based on specific performance metrics:

1. Advancement Requirements:

• Minimum 90% successful delivery rate

• Sufficient sending volume for current stage

• Consistent performance metrics
  
  

2. Common Reasons for Not Advancing:

• Delivery rates falling below 90%

• High bounce rates

• Insufficient sending volume

• Poor engagement metrics
  
  

3. Best Practices:

• Monitor your delivery rates daily

• Follow recommended volume limits

• Address bounces promptly

• Maintain clean mailing lists during warm-up