The original message was received at Tue, 28 Jan 2025 09:10:25 +0100 from [165.154.252.200] ----- The following addresses had permanent fatal errors ----- (reason: 550 Host unknown) (reason: 550 Host unknown) (reason: 550-5.7.1 [83.138.65.30 18] Gmail has detected that this message is likely) (reason: 500 5.0.0 Service unavailable) (reason: 550 Mail content denied [Nu9f9OZKLqwsl+O6ZaPeaGKmotL82dR/bBYFVyut7sg0LcYV7Q04uRA= IP: 83.138.65.30]. https://open.work.weixin.qq.com/help2/pc/20056.) (reason: 554 Reject by content spam) (reason: 550 5.7.0 DT:SPM .For more information, please visit https://feedback.qiye.163.com/static/feedback/#/bounce/ABFOBSMDKwZ2DghYcUt5cQYGHjVjLFd1OxxDWgwvHBhK) (reason: 550 Mailbox unavailable or access denied [M0BS2NE0lcNPLLOsTe6rMqR2CcuLxbCy3P/6z0TSTCQtX94PshsJ3dc= IP: 83.138.65.30]. https://open.work.weixin.qq.com/help2/pc/20057.) (reason: 550 5.2.0 mailbox unavailable.) ----- Transcript of session follows ----- 550 5.1.2 ... Host unknown (Name server: actind.com.hk: host not found) 550 5.1.2 ... Host unknown (Name server: bjfetc.gov.cn: host not found) ... while talking to mxn.mxhichina.com.: >>> DATA >> DATA >> RCPT To: Mailbox delivery restricted by policy error ... Deferred: 452 Mailbox delivery restricted by policy error >>> DATA >> RCPT To: Mailbox delivery restricted by policy error ... Deferred: 452 Mailbox delivery restricted by policy error >>> DATA >> RCPT To: ... Deferred: 451 Internal resource temporarily unavailable - https://community.mimecast.com/docs/DOC-1369#451 [7gUkX-8LPz-JxnR69i9HJQ.au3] >>> DATA >> RCPT To: ... Deferred: 451 Internal resource temporarily unavailable - https://community.mimecast.com/docs/DOC-1369#451 [RDzMMr2HMgCaj1OhQQ6lOw.au88] >>> DATA >> DATA >> DATA ... Deferred: 451-The server has reached its limit for processing requests from your host. ... while talking to mx1.qiye.aliyun.com.: >>> DATA >> DATA >> DATA >> DATA >> DATA ... Deferred: 450 Requested action not taken: ySVVtABnoP5pkphnyePLAA--.5754S3, please try again 550 5.1.2 ,... Host unknown (Name server: .: host not found) ... while talking to mailin2.rmx.de.: >>> DATA ... User unknown