The original message was received at Tue, 28 Jan 2025 09:18:40 +0100 from [165.154.252.200] ----- The following addresses had permanent fatal errors ----- (reason: 451 4.4.1 reply: read error from mx2.qiye.aliyun.com.) (reason: 451 4.4.1 reply: read error from mxw.mxhichina.com.) ----- Transcript of session follows ----- ... while talking to bii-astar-edu-sg01c.mail.protection.outlook.com.: >>> DATA ... Deferred: Connection reset by smtp.bii.a-star.edu.sg. ... Deferred: Connection timed out with hakansaw.cn. ... while talking to idlabs-astar-edu-sg02b.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 2025-01-28T11:43:09.293Z 08DD3E48C9A71CB9] ... while talking to ite-edu-sg.mail.protection.outlook.com.: >>> DATA ... Deferred: 451 4.7.500 Server busy. Please try again later from [83.138.65.30]. (AS780082) [HK2PEPF00006FAF.apcprd02.prod.outlook.com 2025-01-28T11:43:15.331Z 08DD3E531C98714D] ... while talking to mail21.hmail.sg.: ... Deferred: 421 mail11.hmail.sg closing connection ... while talking to mx-apac.mail.gm0.yahoodns.net.: >>> MAIL From: SIZE=3134 ,... Deferred: 421 4.7.0 [TSS04] Messages from 83.138.65.30 temporarily deferred due to unexpected volume or user complaints - 4.16.55.1; see https://postmaster.yahooinc.com/error-codes ... while talking to mx.zoho.com.: >>> RCPT To: ... Deferred: 451 4.7.1 Greylisted, try again after some time >>> DATA >> RCPT To: ... Deferred: 451 4.7.1 Greylisted, try again after some time >>> DATA >> RCPT To: ... Deferred: 451 4.7.1 Greylisted, try again after some time >>> DATA >> DATA >> DATA >> DATA : Relay access denied ... Deferred: 454 4.7.1 : Relay access denied >> DATA >> DATA ... Deferred: Connection timed out with navitas.com.cn. ... while talking to nyp-edu-sg.mail.protection.outlook.com.: >>> DATA ,... Deferred: 451 4.7.500 Server busy. Please try again later from [83.138.65.30]. (AS780082) [HK2PEPF00006FAF.apcprd02.prod.outlook.com 2025-01-28T11:44:09.909Z 08DD3E531C98C7CE] ... while talking to plustek-com-tw.mail.protection.outlook.com.: >>> DATA ... Deferred: 451 4.7.500 Server busy. Please try again later from [83.138.65.30]. (AS780082) [SG1PEPF000082E2.apcprd02.prod.outlook.com 2025-01-28T11:44:13.755Z 08DD3E63335FFE0A]