MailBaseline
Know before your domain stops landing.
Checks whether a sending domain meets Gmail, Yahoo, and Outlook's published requirements, explains each fix in plain English, then watches daily for DNS drift.
Free scans and analyzer with no signup; monitoring from $9/mo.
The problem
The 2024+ bulk-sender rules turned deliverability into a hard technical checklist, and Outlook now rejects non-compliant bulk mail outright. Small senders have no specialist to set it up, and DNS quietly drifts afterwards when an agency edits a record or an ESP rotates a key.
The approach
One scan reads the public DNS and a delivered message, scores the domain against each provider's published requirements, and gives the exact record to paste. Monitored domains are then re-scanned daily, diffed against the previous scan, and alerted on when anything changes.
What's inside
Built in, not bolted on.
Free public domain scan with readiness score
Gmail / Yahoo / Outlook requirements matrix
SPF, DKIM, DMARC, and alignment checks
Copy-paste DNS fix per issue, with re-check
Test-email header analyzer, including one-click unsubscribe
Daily re-scans with record-level drift alerts
DMARC report upload and evidence-gated enforcement advisor
Email, Slack, or Discord alerts and a weekly digest
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