The original message was received at Tue, 28 Jan 2025 10:11:54 +0100 from [165.154.252.200] ----- The following addresses had permanent fatal errors ----- (reason: 550 Host unknown) (reason: 550 Mail content denied [MpV5F2PDAuMbKep8rT6re8rfNQHGjR8kBrKIcio/kZdWN1sU8vZW5as= IP: 83.138.65.30]. https://open.work.weixin.qq.com/help2/pc/20056.) (reason: 550 Mail content denied [M0BS2NE0lcNPf/c80Qo23eo9qSio2xPECet4KfbsjC0H2AtEwFjZiTw= IP: 83.138.65.30]. https://open.work.weixin.qq.com/help2/pc/20056.) (reason: 550 Host unknown) (reason: 550 5.4.1 Recipient address rejected: Access denied. [HK3PEPF0000021D.apcprd03.prod.outlook.com 2025-01-28T09:16:12.545Z 08DD3E6A904E9500]) (reason: 550 5.1.1 User Unknown) (reason: 550 Mail content denied [N/u+XgB1UQZ795tMnO3YBs6YGBMkJXjJ92TeJeB5mB6siFOdJZ7K2Lc= IP: 83.138.65.30]. https://open.work.weixin.qq.com/help2/pc/20056.) (reason: 550 User not found: jia-yf19@mails.tsinghua.edu.cn) (reason: 550 5.7.0 DT:SPM .For more information, please visit https://feedback.qiye.163.com/static/feedback/#/bounce/ABFOBSMCfld0XQ5dcUt5IgYGHjVjLFchO0kVCQwvHBhK) (reason: 550 #5.1.0 Address rejected.) (reason: 550 Mail content denied [Nu9f9OZKLqws/R0n7U2DC5EGBhOo6aVzReDMjh5fQ2egSMmvD3n2+3s= 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/ABFOBSMCflAjDl1ccUAvfQYGHjVjLFchOUlEWgwvHBhK) (reason: 550 Mail content denied [MbmMx8+oB+H1LAZ9SxbBpqH7z1US7APw/n1ozPXkQmdAbaqFd2SSZkE= 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/ABFOBSMCflFxDwhUcUt5cQYGHjVjLFchOEwSXAwvHBhK) (reason: 550 5.7.0 DT:SPM .For more information, please visit https://feedback.qiye.163.com/static/feedback/#/bounce/ABFOBSMCflFxDwhUcUt5cQYGHjVjLFchOEwSXAwvHBhK) (reason: 550 5.7.0 DT:SPM .For more information, please visit https://feedback.qiye.163.com/static/feedback/#/bounce/ABFOBSMCflEiWVtccUt5fAYGHjVjLFcgaEkWWAwvHBhK) ----- Transcript of session follows ----- 550 5.1.2 ... Host unknown (Name server: bito.com.cn: host not found) ... while talking to mxbiz1.qq.com.: >>> DATA >> DATA ... Host unknown (Name server: crina-jiayi.com.cn: host not found) ... while talking to gsm-pku-edu-cn.mail.protection.outlook.com.: >>> DATA ... User unknown >> DATA ... User unknown >> DATA >> RCPT To: ... User unknown >>> DATA >> DATA >> RCPT To: ... User unknown >>> DATA ... Deferred: Connection timed out with pro-cn.site.cdncenter.cn. ... while talking to mxbiz1.qq.com.: >>> DATA >> DATA ... Deferred: 421 4.7.0 Not allowed. ... while talking to mxbiz1.qq.com.: >>> DATA >> DATA ,,... Deferred ... Deferred: Connection timed out with xmu.edu.stu.cn. ... while talking to hzmx01.mxmail.netease.com.: >>> DATA