The original message was received at Tue, 28 Jan 2025 09:27:02 +0100 from [165.154.252.200] ----- The following addresses had permanent fatal errors ----- (reason: 451 4.7.500 Server busy. Please try again later from [83.138.65.30]. (AS780082) [HK2PEPF00006FB1.apcprd02.prod.outlook.com 2025-01-29T08:26:39.839Z 08DD3E48CB58A2A7]) (reason: 451 4.7.500 Server busy. Please try again later from [83.138.65.30]. (AS780082) [SG1PEPF000082E4.apcprd02.prod.outlook.com 2025-01-29T08:26:42.318Z 08DD3E4EA5A383E1]) ----- Transcript of session follows ----- ... while talking to hsu-edu-hk.mail.protection.outlook.com.: >>> DATA ... Deferred: 451 4.7.500 Server busy. Please try again later from [83.138.65.30]. (AS780082) [HK2PEPF00006FB1.apcprd02.prod.outlook.com 2025-01-29T08:26:39.839Z 08DD3E48CB58A2A7] ... while talking to np-edu-sg.mail.protection.outlook.com.: >>> DATA ... Deferred: 451 4.7.500 Server busy. Please try again later from [83.138.65.30]. (AS780082) [SG1PEPF000082E4.apcprd02.prod.outlook.com 2025-01-29T08:26:42.318Z 08DD3E4EA5A383E1] ... Deferred: Connection timed out with silkroad.news.cn. ... Deferred: Connection timed out with ssl.exmail.qq.com. 451 4.4.1 reply: read error from zisb2wooftaccsqhyip51mfqlupuajpl.alicloudwaf.com. ... Deferred: Connection reset by zisb2wooftaccsqhyip51mfqlupuajpl.alicloudwaf.com. Message could not be delivered for 1 day Message will be deleted from queue