The original message was received at Tue, 28 Jan 2025 09:49:01 +0100 from [165.154.252.200] ----- The following addresses had permanent fatal errors ----- (reason: 550 Host unknown) (reason: 451 4.4.1 reply: read error from mta-189.21cn.com.) (reason: 550 5.7.0 DT:SPM .For more information, please visit https://feedback.qiye.163.com/static/feedback/#/bounce/ABFOBSMCfAYkX14JcUt5fQYGHjVjLFd8bEhCDwwvHBhK) (reason: 550 Mail content denied [NSjjVjUmCg+C+PZNNSGx8tGo35vCIgtQOATOV6CDpvmQgC4vpIVQCgk= IP: 83.138.65.30]. https://open.work.weixin.qq.com/help2/pc/20056.) (reason: 550 5.4.1 Recipient address rejected: Access denied. [HK3PEPF0000021A.apcprd03.prod.outlook.com 2025-01-28T08:52:19.573Z 08DD3E3DFC0D5B69]) (reason: 554 RCPT (hongtao@hmkx.cn) dosn't exist) (reason: 550 5.1.1 : Recipient address rejected: User unknown in virtual mailbox table) (reason: 550 5.7.0 DT:SPM .For more information, please visit https://feedback.qiye.163.com/static/feedback/#/bounce/ABFOBSMCfAF5WFsNcUt5dQYGHjVjLFckaRtEXgwvHBhK) (reason: 554 Email rejected due to security policies - https://community.mimecast.com/docs/DOC-1369#554 [7wCF0yLRN_GXRX0T2l26_Q.uk139]) (reason: 550 Mail content denied [Nu9f9OZKLqwsZR/qR5Lso+4ArDEfGL0X5+H53CwOcKaG/37ufQroCMc= IP: 83.138.65.30]. https://open.work.weixin.qq.com/help2/pc/20056.) (reason: 554 5.7.1 : Relay access denied) (reason: 451 4.4.1 reply: read error from freemx2.sinamail.sina.com.cn.) (reason: 550 Mail content denied [MpV5F2PDAuMbLkrXG0BOeU86dIzvVtqoKKpL/xLlzW1Ct2HYDTXJeuQ= 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/ABFOBSMCf1R2XFhdcUt5IQYGHjVjLFckah4RXwwvHBhK) (reason: 550 Host unknown) ----- Transcript of session follows ----- 451 aliyun.cn: Name server timeout 451 hitachi-chem.com.cn: Name server timeout 550 5.1.2 ... Host unknown (Name server: 163.com.cn: host not found) ... while talking to mta-189.21cn.com.: >>> DATA >> DATA >> DATA >> DATA ... Deferred: 450 Requested action not taken: UUJ2ygCnppadmphnioXxAQ--.16888S2, please try again 451 hitachi-chem.com.cn: Name server timeout 451 aliyun.cn: Name server timeout 451 hitachi-chem.com.cn: Name server timeout 451 aliyun.cn: Name server timeout ... while talking to 1827747096.mail.outlook.com.: >>> DATA ,... Deferred: 451 4.7.500 Server busy. Please try again later from [83.138.65.30]. (S77714) [SG2PEPF000B66CD.apcprd03.prod.outlook.com 2025-01-28T08:51:59.649Z 08DD3E4818CACCE2] 451 hitachi-chem.com.cn: Name server timeout 451 aliyun.cn: Name server timeout 451 hitachi-chem.com.cn: Name server timeout 451 aliyun.cn: Name server timeout ... while talking to mxbiz1.qq.com.: >>> DATA >> DATA ... User unknown >> DATA >> DATA ... Deferred: 451 4.7.500 Server busy. Please try again later from [83.138.65.30]. (S77714) [SG1PEPF000082E6.apcprd02.prod.outlook.com 2025-01-28T08:52:36.531Z 08DD3ECAF6EE9724] 451 hitachi-chem.com.cn: Name server timeout 451 aliyun.cn: Name server timeout ... Deferred: Connection timed out with ip.sx47.80data.net. ... while talking to mailcow.timway.com.: >>> DATA : Recipient address rejected: Greylisted for 60 seconds ... Deferred: 450 4.2.0 : Recipient address rejected: Greylisted for 60 seconds >> DATA : Recipient address rejected: Greylisted for 39 seconds ... Deferred: 450 4.2.0 : Recipient address rejected: Greylisted for 39 seconds >> DATA : Recipient address rejected: User unknown in virtual mailbox table 550 5.1.1 ... User unknown >> DATA >> DATA >> DATA >> DATA ... Deferred: 451 4.7.500 Server busy. Please try again later from [83.138.65.30]. (S77714) [HK3PEPF0000021A.apcprd03.prod.outlook.com 2025-01-28T08:55:33.136Z 08DD3E3DFC0E8109] ... while talking to mx5x01.east.net.: >>> DATA : Relay access denied 554 5.0.0 Service unavailable >> DATA >> DATA ,... Deferred: 421 4.7.0 Not allowed. 550 5.1.2 ,,,,... Host unknown (Name server: .: host not found) ... while talking to mx-apac.mail.gm0.yahoodns.net.: >>> MAIL From: SIZE=3113 ... 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 451 hitachi-chem.com.cn: Name server timeout 451 aliyun.cn: Name server timeout ... while talking to qiye163mx01.mxmail.netease.com.: >>> DATA ... Host unknown (Name server: zhicheng.com.hk: host not found)