What’s the difference between simulated vs real bounce testing?

Simulated and real bounce testing serve different purposes:

Simulated testing:

Use test addresses designed to bounce. Control the bounce type received. Verify handling logic works. Safe, repeatable, predictable. Examples: Mailinator test addresses, ESP test modes.

Real bounce testing:

Observe actual production bounces. See real provider responses. Validate against actual diversity. Catches edge cases simulation misses. Examples: Production monitoring, sample audits.

Advantages of each:

Simulated: Controlled, reproducible, safe for development. Real: Authentic, comprehensive, catches real-world variations.

Combined approach:

Simulated for development and regression. Real for validation and ongoing accuracy. Both for complete coverage.

Simulation tests the map; real testing navigates actual waters. Both are necessary for confidence.