Microsoft 365 vs. Google Workspace: verifying the two giants

The two providers behave very differently under SMTP probing. We break down the signals we use to resolve each one accurately.

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Why this matters

Email verification only helps if it's honest. Throughout the CorrectInbox product we return a confidence score and admit “unknown” when a catch-all genuinely can't be resolved — rather than inflating results with a guessed “valid.”

That same principle shapes how we write: practical, specific, and free of the deliverability myths that make lists worse, not better.

Put it into practice

The fastest way to understand verification is to run your own list through it. Start free with 100 verifications — no card required.