The original message was received at Tue, 28 Jan 2025 09:32:53 +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) [SG1PEPF000082E3.apcprd02.prod.outlook.com 2025-01-29T08:33:04.985Z 08DD3E289C9BCBAB]) (reason: 451 4.7.500 Server busy. Please try again later from [83.138.65.30]. (AS780082) [SG2PEPF000B66D0.apcprd03.prod.outlook.com 2025-01-29T08:33:07.552Z 08DD3E9E37CBA6CB]) ----- Transcript of session follows ----- ... while talking to i2r-astar-edu-sg01c.mail.protection.outlook.com.: >>> DATA ... Deferred: 451 4.7.500 Server busy. Please try again later from [83.138.65.30]. (AS780082) [SG1PEPF000082E3.apcprd02.prod.outlook.com 2025-01-29T08:33:04.985Z 08DD3E289C9BCBAB] ... while talking to sal-org-sg.mail.protection.outlook.com.: >>> DATA ... Deferred: 451 4.7.500 Server busy. Please try again later from [83.138.65.30]. (AS780082) [SG2PEPF000B66D0.apcprd03.prod.outlook.com 2025-01-29T08:33:07.552Z 08DD3E9E37CBA6CB] Message could not be delivered for 1 day Message will be deleted from queue