● Live DNS Checker — Real Results

Are your emails actually
reaching the inbox?

Check your SPF, DKIM, DMARC & blacklist status against live DNS in seconds. Plain English results — no sysadmin needed.

Enter your domain name
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Scanning your domain…

Running live DNS checks — takes 5–10 seconds

— Score

Run a check above

Enter your domain and click Check Now

44%
inbox rate without SPF/DKIM/DMARC
89%
inbox rate for fully authenticated senders
39%
of top 1M domains still lack SPF
110K
new domains adopt DMARC every month
Why it matters

Your emails might be disappearing — silently.

🔒

SPF Record

Tells inbox providers which servers are allowed to send email from your domain. Missing SPF makes your emails look suspicious — even legitimate ones.

✍️

DKIM Signature

A cryptographic stamp proving your emails weren't tampered with in transit. Gmail and Outlook require it for bulk senders since 2024.

🛡️

DMARC Policy

Controls what happens when email fails SPF or DKIM. Without it, spammers can impersonate your domain and your sender reputation quietly collapses.

🚫

Blacklist Check

If your domain or sending IP is on a spam blacklist, your emails are auto-blocked. We check against 10 major DNSBLs in real time.

📊

Plain English Results

Unlike tools built for sysadmins, every result explains what it means and exactly how to fix it — no technical background needed.

⚡

Live DNS Data

Results are fetched directly from DNS in real time — not cached or estimated. What you see reflects your actual current configuration.

FAQ

Common questions

Why are my emails going to spam?
The most common causes are a missing or broken SPF record, missing DKIM signature, no DMARC policy, or your IP/domain appearing on a spam blacklist. Run a free check above to identify exactly which issue affects your domain.
What is SPF and do I need it?
SPF (Sender Policy Framework) is a DNS record that tells inbox providers which servers are authorized to send email on your behalf. Since 2024, Gmail and Yahoo require it for bulk senders. Without it, a significant portion of your emails will be filtered or rejected.
What does DKIM do and why does it matter?
DKIM adds a cryptographic digital signature to every email you send. This lets inbox providers verify that your email was genuinely sent by you and wasn't tampered with in transit. It's one of the top requirements for reliable inbox placement in 2026.
How do I check if my domain is on a blacklist?
Enter your domain above and either select "Blacklist" tab or run the full report. We check against 10 major spam blacklists including Spamhaus, Barracuda, and SpamCop. If you're listed, we'll tell you which ones and how to request removal.
Is InboxCheck really free?
Yes. The full SPF, DKIM, DMARC and blacklist check is completely free with no signup required. The site is supported by advertising, which keeps the tools free for everyone.
How often should I check my email deliverability?
Check whenever you add a new email sending service, after making DNS changes, before a major campaign, and at least monthly if you send email regularly. DNS records can be accidentally misconfigured, and blacklist listings can appear without warning.