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mail-tester mail-tester.com ↗

A web service that scores a test email for spam and authentication configuration.

ServiceDev toolsemaildeliverabilitytesting

Screenshot of mail-tester.com, mail-tester's site

Captured 8 Nov 2026

Recommended in 2 threads

Global Microsoft Outage
cnn.com · 18 hours ago
Recommended for checking that a self-hosted mail server is delivering properly.
Outlook.com is rejecting email from domains without DMARC
mailroute.net · 5 days ago
Quick way to check SPF, DKIM and DMARC setup, though some noted it doesn't penalize missing DMARC.

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Link from a commenter, not checked or endorsed by us: ↗ https://mail-tester.com/