Email's Auto IP Warm-up system operates based on specific performance metrics:
Advancement Requirements:
Minimum 90% successful delivery rate
Sufficient sending volume for current stage
Consistent performance metrics
Common Reasons for Not Advancing:
Delivery rates falling below 90%
High bounce rates
Insufficient sending volume
Poor engagement metrics
Best Practices:
Monitor your delivery rates daily
Follow recommended volume limits
Address bounces promptly
Maintain clean mailing lists during warm-up
