About

EmailSpeedTest.org is a nonprofit project that measures email delivery performance across major mailbox providers.

We track transit time, delivery success, and service reliability to provide transparent infrastructure insights for operators, researchers, and the public.

Currently in beta - contact us for more information.

What We Measure

Message transit latency between systems
Delivery success rates and failure classes
Provider and region reliability trends over time

How It Works

Distributed probe accounts run controlled tests
Results are normalized into a consistent schema
Outcomes are aggregated for comparative reporting

Why It Matters

Operational visibility for critical email systems
Early warning signals for provider degradation
Open, neutral benchmarking in the public interest