Forum Discussion
office 365 mail SPF Fail but still delivered
Hello today i received mail from my organization. i check headers and see that spf failed. Received-SPF: Fail (protection.outlook.com: domain of mydomain.com does not designate 67.220.184.98 as pe...
SPF is just one of the measurement for Email security, you may consider DKIM and DMARC as a whole:
Set up SPF to help prevent spoofing - Office 365 | Microsoft Learn
