The original message was received at Tue, 28 Jan 2025 09:41:48 +0100 from [165.154.252.200] ----- The following addresses had permanent fatal errors ----- (reason: 550 Mail content denied [M0BS2NE0lcNPu1DcBCqcIaVkBy3vjWhOixIxeCLInXtQLL7qJTDJY0I= IP: 83.138.65.30]. https://open.work.weixin.qq.com/help2/pc/20056.) (reason: 550 #5.1.0 Address rejected.) (reason: 550-5.7.1 [83.138.65.30 18] Gmail has detected that this message is likely) (reason: 550-5.7.1 [83.138.65.30 18] Gmail has detected that this message is likely) (reason: 550-5.7.1 [83.138.65.30 18] Gmail has detected that this message is likely) (reason: 550-5.7.1 [83.138.65.30 18] Gmail has detected that this message is likely) (reason: 550 Mail content denied [NLAtegSadZQLxk8izCDDSKdpsBIkzkdZ/eOD2bNuG/8BZ0V/s1dgkDE= IP: 83.138.65.30]. https://open.work.weixin.qq.com/help2/pc/20056.) (reason: 550 5.1.1 Recipient unknown ) (reason: 550 5.7.0 DT:SPM .For more information, please visit https://feedback.qiye.163.com/static/feedback/#/bounce/ABFOBSMCfAVxCVJccUt5JwYGHjVjLFd8YkwRVQwvHBhK) (reason: 550 5.7.0 DT:SPM .For more information, please visit https://feedback.qiye.163.com/static/feedback/#/bounce/ABFOBSMCfAV3WV5UcUt5dQYGHjVjLFd8Ox5CWgwvHBhK) (reason: 551 5.1.1 recipient is not exist) ----- Transcript of session follows ----- ... while talking to mxbiz1.qq.com.: >>> DATA >> DATA ... Deferred: 451 4.7.500 Server busy. Please try again later from [83.138.65.30]. (S77714) [SG1PEPF000082E5.apcprd02.prod.outlook.com 2025-01-28T08:45:23.290Z 08DD3E335E13910F] ... while talking to mxn.mxhichina.com.: >>> DATA ... Deferred: 454 Transient reject by behaviour spam at Rcpt State(Connection IP address:83.138.65.30)ANTISPAM_BAT[01201311R1168S8310121229, maildocker-behaviorspam033037026184]: too frequently sendingCONTINUE >> DATA ... Deferred: 454 Transient reject by behaviour spam at Rcpt State(Connection IP address:83.138.65.30)ANTISPAM_BAT[01201311R1668S6210121229, maildocker-behaviorspam033037038082]: too frequently sendingCONTINUE >> DATA ... Deferred: 451 4.7.500 Server busy. Please try again later from [83.138.65.30]. (S77714) [DB1PEPF00039230.eurprd03.prod.outlook.com 2025-01-28T08:46:38.673Z 08DD3F70AA98A55A] ... while talking to mx2.sgict.gov.sg.: >>> RCPT To: ... User unknown >>> DATA >> DATA >> DATA >> RCPT To: 550 5.1.1 ... User unknown >>> DATA >> DATA >> DATA >> DATA >> DATA ... User unknown >> DATA ... Deferred: 450 Requested action not taken: BQAi0gA3uZ9MmphnU_rkAA--.46249S3, please try again 550 5.1.2 ,... Host unknown (Name server: .: host not found)