How can seed lists and panel data confirm provider patterns?

Using seed lists and panels for diagnosis:

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.