How can seed lists and panel data confirm provider patterns?

Seed list testing:

• Send to controlled test addresses at each provider
• Check exact placement (inbox, spam, tabs)
• Consistent methodology enables comparison
• Shows what happens to mail you control

Panel data:

• Third-party services tracking real user inboxes (with permission)
• Shows actual placement for real recipients
• More representative but less controlled
• May have coverage gaps

Combined insight:

• Seeds confirm controlled test results
• Panels confirm real-world impact
• Agreement between both strengthens conclusions
• Use both methods when diagnosing provider-specific patterns.

Test shipments show your controlled results. Market reports show real customer experience.