Email Tools

Check your DNS records on a single screen.

Quickly look up your SPF, DKIM, DMARC, MX and other DNS records. Pick one of the tools below to get started.

SPF Lookup

Look up and generate Sender Policy Framework records.

Start lookup

MX Lookup

Check Mail Exchange servers and their priorities.

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DKIM Lookup

Verify DomainKeys Identified Mail signatures.

Start lookup

DMARC Lookup

View your email authentication policy.

Start lookup

BIMI Lookup

Check your brand BIMI record and VMC certificate.

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MTA-STS Lookup

Validate your enforced TLS policy and mta-sts.txt file.

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PTR Lookup

View reverse DNS (PTR) record and FCrDNS for your IP.

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Blacklist Check

Scan your IP or domain across 50+ DNSBLs in parallel.

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Header Analyzer

Parse email header: hops, delays, SPF/DKIM/DMARC.

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NS Lookup

List nameserver records for your domain.

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IP Lookup

Get geographic and network information for an IP.

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Information

Why does email authentication matter?

The SPF, DKIM and DMARC trio defines who can send email on behalf of your domain, verifies the authenticity of your messages with a signature, and tells receiving servers what to do with spoofed emails. Misconfigured, your emails may end up in spam.

  • SPF — which servers can send email on your behalf
  • DKIM — your emails are verified with a cryptographic signature
  • DMARC — tells what to do when SPF/DKIM fail
Start SPF Lookup 
v=spf1 include:_spf.ulakmail.com ~all

v=DKIM1; k=rsa;
  p=MIGfMA0GCSqGSIb3DQEBAQUAA...

v=DMARC1; p=quarantine;
  rua=mailto:dmarc@ulakmail.com;
  pct=100
FAQ

Frequently asked questions

What does an SPF record do?
SPF (Sender Policy Framework) lets you publish the list of servers authorized to send email on behalf of your domain. This reduces spoofed email delivery.
How does a DKIM signature work?
DKIM signs outgoing emails with a private key tied to your domain. The receiving server verifies the signature with the public key in DNS.
Which DMARC policy should I choose?
Start with monitor (p=none), then quarantine, and finally reject. This phased rollout reduces the risk of misconfiguration.
How do I check my MX records?
Enter your domain into our MX Lookup tool to list every MX record and its priority value.
How do I look up an IP address?
Our IP Lookup tool shows the geographic location, ISP and blacklist status of an IP address instantly.