Any using Office 365 that has a domain at DMARC=REJECT see any bounce backs for mail sent to QQ.com addresses for SPF failures, when they IP address they mentioned failed is clearly in the SPF record?
Example: Reported error: 550 5.7.23 The message was rejected because of Sender Policy Framework violation -> 550 DMARC check failed [MTIzknf/jEeC0aTwbOXvrBiAcTvXxZqFXcru3oWyMZucp1BLJ8LQWCk= IP: 40.107.82.82]. http://service.mail.qq.com/cgi-bin/help?subtype=1&&no=1001508&&id=16 DMARC指引_QQ邮箱帮助中心<http://service.mail.qq.com/cgi-bin/help?subtype=1&&no=1001508&&id=16> 一、DMARC（Domain-based Message Authentication,Reporting & Conformance）DMARC是一种基于现有的SPF和DKIM协议的可扩展电子邮件认证协议，在邮件收发双方建立了邮件反馈机制，便于邮件发送方和邮件接收方共同对域名的管理进行完善和监督... service.mail.qq.com . DSN generated by: BN6PR02MB2308.namprd02.prod.outlook.com Remote server: newxmmxszb50.qq.com 40.107.82.82 is within 40.107.0.0/16, which is in the SPF record they ask you to use: spf.protection.outlook.com Jason Carter IT Manager Microsoft Enterprise Applications and Systems Information Technology Services | Florida State University p 850.645.8069 | w its.fsu.edu<https://its.fsu.edu/>
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