The original message was received at Tue, 28 Jan 2025 08:47:36 +0100 from [165.154.252.200] ----- The following addresses had permanent fatal errors ----- (reason: 550 5.4.1 Recipient address rejected: Access denied. [SG1PEPF000082E3.apcprd02.prod.outlook.com 2025-01-28T07:47:59.729Z 08DD3E289A6E7EF6]) (reason: 550 5.4.1 Recipient address rejected: Access denied. [SG1PEPF000082E3.apcprd02.prod.outlook.com 2025-01-28T07:47:58.979Z 08DD3E289A6E7EF6]) (reason: 550 #5.1.0 Address rejected.) (reason: 550 Host unknown) (reason: 550 5.7.0 DT:SPM .For more information, please visit https://feedback.qiye.163.com/static/feedback/#/bounce/ABFOBSMDKFZyUg9dcUt5JwYGHjVjLFQmYh0UXgwvHBhK) (reason: 550 5.7.0 DT:SPM .For more information, please visit https://feedback.qiye.163.com/static/feedback/#/bounce/ABFOBSMDKFZyUg9dcUt5JwYGHjVjLFQmYh0UXgwvHBhK) ----- Transcript of session follows ----- ... while talking to connect-polyu-hk.mail.protection.outlook.com.: >>> DATA ... User unknown ... User unknown ... while talking to mail.csu.edu.cn.: >>> DATA ... Deferred: 450 Requested action not taken: FEDFygDH8hSzi5hnHFxJAQ--.7215S3, please try again ... while talking to dmeas14.imail.scig.gov.hk.: >>> RCPT To: ... User unknown >>> DATA ... Host unknown (Name server: lojafpf.pt: host not found) ... while talking to hzmx01.mxmail.netease.com.: >>> DATA