Glossary

SPF Record

Q: What does SPF Record mean in cybersecurity?

SPF Record is a security term used to describe part of an organisation's external risk, exposure, or vulnerability management process.

Q: Why does SPF Record matter for external attack surface monitoring?

It matters because attackers evaluate internet-facing assets continuously, and unmanaged exposure can become an exploitable path into customer data, infrastructure, or business operations.

Q: How does VeilScan help with SPF Record?

VeilScan discovers public assets, checks them for verified issues, prioritises findings by business impact, and produces reports that explain remediation clearly.

Sender Policy Framework — which mail servers can send email for your domain

Quick Answer: An SPF (Sender Policy Framework) record is a DNS TXT record at your domain root that lists the mail servers and services authorised to send email on behalf of your domain. Receiving mail servers check SPF to determine whether an incoming email was sent from an authorised source. Without SPF, any mail server can send email claiming to be from your domain.

How does an SPF record work?

When a receiving mail server receives an email claiming to be from user@yourcompany.com, it queries DNS for the SPF record at yourcompany.com. The SPF record lists the authorised mail servers and IP ranges. If the sending server is not on the list, the email fails SPF — and if DMARC is configured with enforcement, it may be rejected or quarantined.

An example SPF record: v=spf1 include:_spf.google.com include:sendgrid.net -all — this authorises Google Workspace and SendGrid to send email for the domain, and specifies -all (fail) for everything else.

What does a missing or weak SPF record enable?

Without an SPF record, any mail server can send email appearing to come from your domain. A +all or ?all mechanism effectively permits all senders — making SPF useless. Common problems:

No SPF record — no SPF check is possible; email spoofing is unrestricted
+all or ?all — permits any sending server; provides no restriction
Missing legitimate senders — if a legitimate email service (marketing tool, support platform) is not included in SPF, its email fails SPF and may be marked as spam

How does SPF relate to DMARC and DKIM?

SPF, DKIM, and DMARC work together. SPF validates the sending mail server. DKIM validates the email content with a cryptographic signature. DMARC specifies the policy for what happens when either check fails. All three are needed for comprehensive email authentication. VeilScan checks all three. See DMARC and DKIM.

What are common questions about SPF Record?

What does SPF Record mean in cybersecurity?

SPF Record describes a security concept that affects how teams understand, monitor, and reduce external exposure across internet-facing assets.

Why does SPF Record matter for external attack surface monitoring?

It matters because attackers continuously inspect public assets. Tracking this concept helps teams reduce exploitable exposure before it becomes a breach path.

How does VeilScan help with SPF Record?

VeilScan discovers public assets, validates findings with proof, prioritises issues by business impact, and explains remediation in reports built for engineering and leadership.

What related terms should you read next?

Check your SPF, DKIM, and DMARC records. VeilScan's free scan includes email security checks for your domain. Start your free scan → · Back to glossary