InboxFixer
InboxFixer Platform:
100% Transparent

Free Domain DNS Check.
Fix Email Delivery Fast.

Run a free email DNS check for SPF, DKIM, DMARC, MX, BIMI, MTA-STS, rDNS, and blacklist issues. Get a technical health score plus exact DNS records to fix emails not delivering.

SPF Record
DKIM Align
DMARC Policy
MX Integrity
BIMI Brand
MTA-STS Check
9+ IP Blacklists
Reverse DNS (rDNS)
Live Audit Preview

yourdomain.com

Simulated DNS Zone Diagnostic Results

75
Health GradeC - Action Required

Why this matters:

DMARC tells servers like Google and Outlook how to handle messages claiming to be from your domain but failing SPF/DKIM checks. Without it, spam filters cannot verify your headers, heavily penalizing your outreach reputation.

Recommended DNS TXT Record
Host / Name_dmarc
TypeTXT
Valuev=DMARC1; p=quarantine; pct=100; rua=mailto:dmarc-reports@yourdomain.com

Repair Your Domain in 3 Simple Steps

01

Scan Domain DNS

Enter your sending domain to run a free live check across email DNS, MX, blacklist, and authentication records.

02

Find Delivery Problems

See which DNS records are missing, broken, or misaligned with plain-English explanations for every issue.

03

Apply Copy-Paste Fixes

Copy the recommended TXT and MX records, publish them in your DNS provider, and improve inbox placement.

Our Founding Promise

A Project Built on Transparency

We launched InboxFixer to make email deliverability audits simple, accessible, and 100% honest. Here is our vow to you.

Plain-English Simplicity

Email server configurations can be incredibly confusing. We built InboxFixer to decode complex cryptographic key selectors, includes, and record syntax errors into plain, simple instructions, empowering you to manage your own domain authentication records.

Join InboxFixer Today

Be a part of a community that values honest, reliable, and secure domain auditing software. Try our tool completely free today, and protect your email sender reputation!

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Frequently Asked Questions

Find answers to the most common email deliverability and DNS zone authorization inquiries.