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DNS setup for DMARC, SPF and DKIM

Set up the three key DNS records — DMARC, SPF and DKIM — to activate full domain monitoring and ensure reliable email authentication.

To collect email authentication data and identify sources of DMARC failures, you need to configure three essential DNS records for your domain:

  • DMARC – the core policy and reporting mechanism
  • SPF – defines which IPs are allowed to send email on behalf of your domain
  • DKIM – verifies that messages haven’t been altered in transit

DMARCeye helps you set these up step by step.

1. DMARC (Required)

This is the most important record and the only one required for DMARC/eye to start collecting data.

  • Type: TXT
  • Name / Host: _dmarc
  • Value: (provided in the DMARC/eye setup panel)

Example:

v=DMARC1; p=none; rua=mailto:nwyg5cle@rua.dmarceye.com; fo=1; ri=86400;

Tip: Never use a CNAME for DMARC — only TXT records are valid.

 

2. SPF (Recommended)

This record defines which IPs or services (e.g. Google, Mailchimp, Outlook) are allowed to send emails using your domain.

  • Type: TXT
  • Name / Host: @
  • Value example:
  • v=spf1 include:_spf.google.com include:mailgun.org -all

You should add all services you use for sending email. If the SPF is missing or incorrect, emails may fail authentication checks.

3. DKIM (Recommended)

DKIM ensures that your messages haven’t been modified during delivery. Each email provider (e.g. Gmail, Mailchimp) has their own DKIM selector.

  • Type: TXT
  • Name / Host: something like default._domainkey or s1._domainkey
  • Value: provided by your sending service (not by DMARCeye)

If you use multiple sending services, you may need multiple DKIM records with different selectors.

How do I know it works?

  • After setting the records, go back to DMARC/eye → Domains → Validate records
  • If everything is correct, your domain status will turn green and data will begin flowing within 24–48 hours

Common issues

  • Wrong record type (e.g. CNAME instead of TXT)
  • Missing _dmarc in the host name
  • Extra spaces or broken line breaks in the value field
  • DNS changes not yet propagated