Deliverability Readiness

Free Domain Health Checker

Check SPF, DKIM, DMARC, MX records, blacklist risk, and sender reputation signals before launching business outreach.

Basic report is free

Get the score, key statuses, and top recommendations first. Create a free account to unlock raw DNS records and detailed guidance.

You can paste a URL. DevBoxy will check the public domain.

Optional, but recommended for exact DKIM checks.

Optional. Checks CNAME or A record readiness.

This tool checks public DNS only. It does not require domain ownership and does not expose private server details.
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Domain health guide

Prepare your domain for safer outreach and business communication

DevBoxy checks the public DNS records that influence deliverability readiness, email authentication, and sender reputation. Use this report before connecting a mailbox or starting outreach from a new domain.

The checker reviews MX, SPF, DMARC, DKIM, A/AAAA records, blacklist risk, and optional tracking domain DNS. A strong score does not guarantee inbox delivery, but it helps identify technical issues before they affect business communication.

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SPF Checker DKIM Checker DMARC Checker MX Checker Blacklist Checker Email Header Analyzer