The original message was received at Tue, 28 Jan 2025 11:34:55 +0100 from [165.154.252.200] ----- The following addresses had permanent fatal errors ----- (reason: 550 5.4.1 Recipient address rejected: Access denied. [HK2PEPF00006FAE.apcprd02.prod.outlook.com 2025-01-28T10:36:02.138Z 08DD3E2899068A6F]) (reason: 550 5.4.1 Recipient address rejected: Access denied. [HK3PEPF0000021C.apcprd03.prod.outlook.com 2025-01-28T10:37:14.852Z 08DD3E52F848FD02]) ----- Transcript of session follows ----- ... while talking to imre-astar-edu-sg01e.mail.protection.outlook.com.: >>> DATA ... User unknown ... Deferred: 451 4.7.500 Server busy. Please try again later from [83.138.65.30]. (AS780082) [HK2PEPF00006FAE.apcprd02.prod.outlook.com 2025-01-28T10:36:03.763Z 08DD3E2899068A6F] ... while talking to mx2.sgict.gov.sg.: >>> RCPT To: ... Deferred: 452 Too many recipients received this hour >>> DATA >> RCPT To: ... Deferred: 452 Too many recipients received this hour >>> DATA >> DATA >> DATA >> DATA >> DATA ,,...u.sg>,,,... Deferred: 421-4.7.28 Gmail has detected an unusual rate of unsolicited mail. To protect ... while talking to mx2.sgict.gov.sg.: >>> RCPT To: ... Deferred: 452 Too many recipients received this hour >>> RCPT To: ... Deferred: 452 Too many recipients received this hour ... while talking to mx3.sgict.gov.sg.: ,,... Deferred: 421 #4.4.5 Too many connections from your host. ... while talking to mx2.sgict.gov.sg.: >>> MAIL From: SIZE=3282 ... Deferred: 421 #4.x.2 Too many messages for this session ... while talking to nyp-edu-sg.mail.protection.outlook.com.: >>> DATA ... User unknown ... while talking to mx2.sgict.gov.sg.: >>> RCPT To: ... Deferred: 452 Too many recipients received this hour >>> DATA ,,,,,... Deferred: 421 #4.4.5 Too many connections from your host. ... while talking to mx2.sgict.gov.sg.: >>> RCPT To: ... Deferred: 452 Too many recipients received this hour >>> DATA >> DATA >> DATA >> DATA >> DATA >> DATA ,... Deferred: 421-4.7.28 Gmail has detected an unusual rate of unsolicited mail. To protect