SPF - Sender Policy Framework

Sender Policy Framework…

Microsoft sources

• Microsoft 365 Microsoft Defender for Office 365: Set up SPF to help prevent spoofing - https://learn.microsoft.com/en-us/microsoft-365/security/office-365-security/email-authentication-spf-configure?view=o365-worldwide

some troubleshounting tools

• http://spf.myisp.ch
• DNS looking glasses
  • https://toolbox.googleapps.com/apps/dig/
  • MS?

RfC and standards

• rfc7208 https://www.rfc-editor.org/rfc/rfc7208