SPF DKIM DMARC

SPF, DKIM and DMARC check for business email domains

A focused check for the three core email authentication controls that reduce domain spoofing, phishing and fake invoice risk.

What SPF, DKIM and DMARC do

SPF tells receivers which servers may send mail for your domain. DKIM helps prove that messages were signed by an approved sender. DMARC tells receivers what to do when SPF or DKIM does not align. Together, they make domain spoofing harder and give your business better evidence when investigating phishing or fake invoice messages.

SPF

We check whether an SPF record exists, whether it includes obvious providers and whether the all mechanism is strict or soft.

DKIM

We check common selectors and any selector values you provide from your email provider.

DMARC

We check whether DMARC exists, whether it is p=none, quarantine or reject, and whether reporting is configured.

Alignment

We explain why changing DMARC too aggressively before confirming senders can break legitimate mail.

When to order this check

  • You use Microsoft 365 or Google Workspace
  • You send invoices by email
  • You use booking or payment links
  • You recently changed email provider
  • Customers report suspicious emails
  • You want safer DMARC rollout

Buyer, input and deliverable

This check is for a business owner, domain administrator or IT provider who needs a written view of one business email domain before making DNS changes. Provide the email domain, known mail provider and any DKIM selector supplied by that provider. You receive record evidence, a plain-English risk explanation and prioritised recommendations in the Starter PDF report.

For the wider record set, see the email domain security review.

Sample output

Example record summary: "SPF: present; DKIM: selector not verified from supplied information; DMARC: monitoring policy. Priority: medium. Next step: obtain the active DKIM selector from the provider, confirm all legitimate senders and review DMARC reports before enforcement."

See the sample report format.

Important DNS note

ScanLens can review records and recommend wording, but the final DNS change must be made in the account that controls your domain DNS. For DKIM, the correct selector normally comes from your mail provider.

Need staff guidance?

Business Protection Setup
£399

Choose Business Protection if you want the technical check plus a staff workflow for suspicious emails and fake invoices.

Purchase FAQ

Can ScanLens publish the records?

No. The standard review does not include DNS access or implementation. Recommendations can be passed to the person who controls the domain.

Does a pass guarantee email cannot be spoofed?

No. The report is a time-specific public-record review and not a guarantee against phishing, impersonation or delivery problems.

How much is the check?

It is included in the £99 Starter review. Prices shown are the total prices. No VAT is currently charged.

Can I confirm my selector before buying?

Yes. Use the Business enquiry form and send only the public selector name, domain and provider, not credentials.