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DMARC Checker vs SMTP Debug Tool
Tests SMTP connections, not DNS-based authentication records
DMARC CheckerCheck if your emails are DMARC, DKIM, and SPF compliant
SMTP Debug ToolTest and debug your SMTP connection. Quickly and for free. Which to pick
Pick DMARC Checker if you want…
- Quick DMARC, DKIM, SPF checks
Pick SMTP Debug Tool if you want…
- 3-in-1 SMTP testing and debugging
- SMTP debugging
Side by side
- What it is
- DMARC Checker:DMARC Checker verifies email DMARC, DKIM, and SPF compliance via a simple email test.
- SMTP Debug Tool:A free web tool to test, proxy, and blackhole SMTP connections with real-time session logs.
- Best for
- DMARC Checker:Quick DMARC, DKIM, SPF checks
- SMTP Debug Tool:3-in-1 SMTP testing and debugging
- Who it’s for
- DMARC Checker:Developers and security teams needing email authentication validation
- SMTP Debug Tool:Developers and engineers who need to debug email sending setups.
- Pricing
- DMARC Checker:Free
- SMTP Debug Tool:Free
- Works with
- DMARC Checker:—
- SMTP Debug Tool:Amazon SES, SendGrid, Mailgun, Sendinblue, Google SMTP, Elastic Email, SMTP2GO, UniOne
DMARC Checker features
- Email-based verification. Send an email to a unique address to receive a compliance report.
- DMARC compliance check. Validates DMARC records and alignment with From header.
- DKIM signature verification. Ensures email is signed with a valid DKIM key and not tampered.
- SPF record validation. Confirms sending server IP matches domain's SPF policy.
- Full report with details. Provides a brief overview plus a link to the complete analysis.
- Privacy-first handling. Email address is used only for the report and not shared.
SMTP Debug Tool features
- SMTP Test. Run a quick SMTP session in the browser and view the full conversation log.
- SMTP Proxy. Log an existing SMTP connection between your app and mail provider for error analysis.
- SMTP Blackhole. Create a safe test session without exposing real credentials, capturing logs only.
- Real-time logs. See live, detailed logs of every SMTP command and response.
- No login required. All core functions are accessible without registration.
- Extended parameters for logged-in users. Add subject, HTML body, and extra headers, and raise hourly limits.
DMARC Checker vs SMTP Debug Tool FAQ
Is DMARC Checker or SMTP Debug Tool free?+
Yes, both are free.
On DevHunt
Based on each tool's website and DevHunt data. Details may change; check the official sites.