SPF Record — What It Is and How to Configure [2026]

Enterno.io Editorial Team

SPF: Definition and Use Cases

By Anatoly Oshmanovsky · Updated Apr 17, 2026

TL;DR:

SPF (Sender Policy Framework) is a DNS TXT record where the domain owner declares which IPs are allowed to send email on their behalf. Example: "v=spf1 include:_spf.google.com ~all". Receiving mail servers check SPF and flag letters as spam on mismatch. Protects against email spoofing and phishing.

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What is SPF

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SPF + DKIM + DMARCFull email protection triad check

Antispam StatusBlacklist check

MX ConfigurationCorrect mail server configuration

Email ScoreEmail deliverability score

Why teams trust us

MX record check

SMTP

SMTP verification

SPF

SPF + DKIM + DMARC

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How it works

Enter email address

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Why check email settings?

Proper SPF, DKIM, and DMARC configuration directly impacts email deliverability. Without these records, your emails land in spam or are rejected before delivery.

SPF Check

SPF record correctness: syntax, allowed server list, fail mechanism.

DKIM Analysis

Presence and validity of DKIM signature for the specified selector.

DMARC Policy

DMARC record parsing: policy, rua/ruf reports, SPF and DKIM alignment.

Email Score

Numerical delivery readiness score with improvement recommendations.

Who uses this

Email marketers

mailing list verification

Developers

registration validation

Sales

CRM contact check

Sysadmins

mail delivery troubleshooting

Common Mistakes

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Missing SPF recordWithout SPF, emails from your domain are treated as potential spoofing.

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SPF with ?all instead of -all?all means "neutral" — that's not protection. Use -all.

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DMARC without policyp=none only collects reports. Move to p=quarantine or p=reject.

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Not reading DMARC reportsDMARC generates reports on all emails. Analyze them to find unauthorized sending.

Best Practices

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Deploy SPF → DKIM → DMARC sequentiallySPF first, then DKIM, then DMARC. Each step must work before moving to the next.

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Start DMARC with p=noneCollect reports for 2–4 weeks, ensure all legitimate mail passes, then tighten policy.

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Add rua report addressrua=mailto:dmarc@yourdomain.com — receive weekly aggregate reports.

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Check after changing providerWhen changing hosting or ESP, always update SPF and DKIM keys.

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Email check history and API keys for service integration.

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Frequently Asked Questions

Do I need SPF?

If you work with web infrastructure or APIs, almost certainly yes. See the article above for specific use cases.