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web network-tools• Email Security

SPF Record Checker & Validator

Ensure your emails land in the primary inbox rather than the spam folder. Validates SPF record syntax, mechanism prefixes, and the critical 10-lookup DNS limit.

Queries public DNS TXT records.
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How to Use SPF Record Checker & Validator

1

Enter Domain

Type your domain name (e.g. yourcompany.com).

2

Check SPF

Query the domain's TXT records for SPF declarations.

3

Inspect Report

Review authorized IP mechanisms, includes, and warning flags.

About SPF Record Checker & Validator

Parses TXT records matching `v=spf1`, recursively evaluating `include:`, `a:`, `mx:`, `ip4:`, and `ip6:` directives against RFC 7208 standards.

Supported Formats

DNS TXTSPF

Operational Limits

  • •Requires public DNS propagation

Key Features

  • Validates v=spf1 syntax compliance
  • Audits RFC 7208 10-DNS-lookup limit
  • Checks softfail (~all) vs hardfail (-all) policies
  • Flags deprecated ptr mechanisms

Frequently Asked Questions

RFC 7208 mandates that an SPF evaluation must not require more than 10 DNS lookups to resolve all includes and mechanisms; exceeding this causes SPF Permanent Errors (PermError).

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