Should I segment my list during warmup?

First tier (warmup start):

• Opened or clicked in last 30 days
• Recent subscribers (last 90 days)
• Known high engagers

Second tier (after initial warmup):

• Opened in last 60-90 days
• Moderate engagement history

Third tier (later stages):

• Opened in last 6 months
• Lower but present engagement

Caution tier (if at all):

• No engagement in 6+ months
• Unknown engagement status
• May never add during recovery
• Engagement-based segmentation ensures positive signals dominate during warmup.

Deliver to the most receptive customers first. Their positive reception builds your standing.