Blacklist Shield

SPF Record Checker

Verify your Sender Policy Framework configuration

Why SPF Records Matter

  • Prevent email spoofing
  • Authorize mail servers
  • Improve deliverability

Common Configurations

v=spf1 include:_spf.google.com ~all

Google Workspace setup

v=spf1 ip4:192.0.2.0/24 -all

IP-based configuration

Understanding SPF Records

SPF (Sender Policy Framework) records specify which mail servers are authorized to send email on behalf of your domain.

Record Format

v=spf1 [mechanisms] [qualifier]all

Mechanisms

  • ip4: IPv4 addresses
  • ip6: IPv6 addresses
  • include: Other domains
  • mx: MX records

Qualifiers

  • +: Pass (default)
  • -: Fail
  • ~: SoftFail
  • ?: Neutral