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 notdesignate 220.127.116.11 as permitted sender) receiver=protection.outlook.com;
why spffailed mails normally received?
i check SPF at mxtoolbox and SPF is correctly configured.
Failing SPF will not cause Office 365 to drop a message, at best it will mark it as Junk, but even that wont happen in all scenarios.