The original message was received at Tue, 28 Jan 2025 11:24:25 +0100 from [165.154.252.200] ----- The following addresses had permanent fatal errors ----- (reason: 550 Mail content denied [N/u+XgB1UQZ7SqMA1ZLGLrhoAv7OHo9VxjXix99xbkPjqbO67XCQ95g= IP: 83.138.65.30]. https://open.work.weixin.qq.com/help2/pc/20056.) (reason: 550 User not found: shuaidandan@cec.org.cn) (reason: 550 5.7.0 DT:SPM .For more information, please visit https://feedback.qiye.163.com/static/feedback/#/bounce/ABFOBSMCeld0WVMOcUt5fAYGHjVjKwEnOE9CWQwvHBhK) (reason: 550 5.4.1 Recipient address rejected: Access denied. [SG1PEPF000082E8.apcprd02.prod.outlook.com 2025-01-28T10:28:07.775Z 08DD3E591F3BA33D]) (reason: 550 Mail content denied [NSjjVjUmCg+C+PZNNSGx8tGXWu0nT5yYH6HuGv+QzlNBIhnf70xRjHU= IP: 83.138.65.30]. https://open.work.weixin.qq.com/help2/pc/20056.) (reason: 550 5.7.0 DT:SPM .For more information, please visit https://feedback.qiye.163.com/static/feedback/#/bounce/ABFOBSMCelAkXQ8NcUt5dgYGHjVjKwEmbxkVDAwvHBhK) (reason: 550 Mail content denied [ORLs+t4qA9N4ZWlxO60NrbkHMqKsPAkYiXcejc6byhiojPG4vLEzSo8= IP: 83.138.65.30]. https://open.work.weixin.qq.com/help2/pc/20056.) (reason: 550 5.7.0 DT:SPM .For more information, please visit https://feedback.qiye.163.com/static/feedback/#/bounce/ABFOBSMCelF3CFgPcUt5IQYGHjVjKwEmOE8TXgwvHBhK) (reason: 550 Mail content denied [NSjjVjUmCg+CnGEL2/GJtvP3t+qgQLZuwIHRaxeVwkX0aqX9O4AvqNc= IP: 83.138.65.30]. https://open.work.weixin.qq.com/help2/pc/20056.) (reason: 550 User not found: shuai.yang@siat.ac.cn) (reason: 550 5.7.0 DT:SPM .For more information, please visit https://feedback.qiye.163.com/static/feedback/#/bounce/ABFOBSMCelMiXFsOcUt4IgYGHjVjKwEmOUEVCwwvHBhK) (reason: 550 5.7.0 DT:SPM .For more information, please visit https://feedback.qiye.163.com/static/feedback/#/bounce/ABFOBSMCelMiXFsOcUt4IgYGHjVjKwEmOUEVCwwvHBhK) ----- Transcript of session follows ----- ... while talking to mxbiz1.qq.com.: >>> DATA >> DATA ... User unknown >> DATA ... Deferred: 421 Too many connections ... while talking to hzmx01.mxmail.netease.com.: >>> DATA >> RCPT To: ... Deferred: 452 Too many recipients received this hour >>> DATA >> DATA ... Deferred: 450 Requested action not taken: DzuowAAHDa0jsZhnipRqAA--.6732S3, please try again ... while talking to ipsen-com-cn.mail.protection.outlook.com.: >>> DATA ... User unknown >> DATA ... Deferred: 403 4.7.0 TLS handshake failed. ... while talking to hzmx01.mxmail.netease.com.: >>> DATA >> DATA >> DATA >> DATA ,... Deferred: 451 4.7.500 Server busy. Please try again later from [83.138.65.30]. (AS780082) [SG2PEPF000B66C9.apcprd03.prod.outlook.com 2025-01-28T10:29:30.586Z 08DD3E3DF5FE7E98] ... Deferred: Connection timed out with public1.sta.net.cn. ... while talking to mx2.scut.edu.cn.: >>> DATA >> DATA >> DATA >> DATA ... Deferred: 450 Requested action not taken: rvsmygAnhJLSsZhnVDVjAA--.9443S3, please try again ... while talking to mxbiz1.qq.com.: >>> DATA >> DATA ... User unknown >> DATA >> DATA ... Deferred: 451 Now greylisted - please try again in five minutes. >> DATA ... Deferred: 451 Still greylisted - please try again in five minutes. >> DATA ... Deferred: 451 Still greylisted - please try again in five minutes. >> DATA ... Deferred: 451 Still greylisted - please try again in five minutes. >> DATA ... Deferred: 451 Still greylisted - please try again in five minutes. >> DATA ... Deferred: 451 Still greylisted - please try again in five minutes. ,,,... Deferred: 421 4.7.0 Not allowed. 550 5.1.2 ... Host unknown (Name server: .: host not found) ... while talking to mx-tw.mail.gm0.yahoodns.net.: >>> MAIL From: SIZE=3100 ... 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