The original message was received at Tue, 28 Jan 2025 09:20:17 +0100 from [165.154.252.200] ----- The following addresses had permanent fatal errors ----- (reason: 451 4.4.1 reply: read error from mxn.mxhichina.com.) ----- Transcript of session follows ----- ... while talking to childrensociety-org-sg.mail.protection.outlook.com.: >>> DATA ... Deferred: 451 4.7.500 Server busy. Please try again later from [83.138.65.30]. (AS780082) [SG1PEPF000082E7.apcprd02.prod.outlook.com 2025-01-28T12:23:54.801Z 08DD3F14CE6793AF] ... while talking to ices-astar-edu-sg01e.mail.protection.outlook.com.: >>> DATA ... Deferred: 451 4.7.500 Server busy. Please try again later from [83.138.65.30]. (AS780082) [SG2PEPF000B66CB.apcprd03.prod.outlook.com 2025-01-28T12:23:59.383Z 08DD3F04F45B4367] ... while talking to imre-astar-edu-sg01e.mail.protection.outlook.com.: >>> DATA ... Deferred: 451 4.7.500 Server busy. Please try again later from [83.138.65.30]. (AS780082) [HK3PEPF00000220.apcprd03.prod.outlook.com 2025-01-28T12:24:03.462Z 08DD3EBABAB4968E] ... Deferred: Connection refused by lkatech.com.cn. ... while talking to mail11.hmail.sg.: ,... Deferred: 421 mail21.hmail.sg closing connection ... while talking to mxn.mxhichina.com.: >>> DATA >> DATA ... Deferred: 451 4.7.500 Server busy. Please try again later from [83.138.65.30]. (AS780082) [HK3PEPF00000221.apcprd03.prod.outlook.com 2025-01-28T12:24:13.213Z 08DD3E3451AF14E9] ... Deferred: Connection timed out with wolverine.cn. Warning: message still undelivered after 4 hours Will keep trying until message is 1 day old