The original message was received at Tue, 28 Jan 2025 11:25:42 +0100 from [165.154.252.200] ----- The following addresses had permanent fatal errors ----- (reason: 550 5.7.0 DT:SPM .For more information, please visit https://feedback.qiye.163.com/static/feedback/#/bounce/ABFOBSMCelF2WQgIcUkvIQYGHjVudwcjY05BWgwvHBJa) ----- Transcript of session follows ----- ... while talking to mx1.sgict.gov.sg.: >>> RCPT To: ... Deferred: 452 Too many recipients received this hour ... while talking to mx1.smtp.goog.: >>> DATA >> DATA >> DATA >> DATA ,,,,... Deferred: 421-4.7.28 Gmail has detected an unusual rate of unsolicited mail. To protect ... while talking to mx2.sgict.gov.sg.: >>> MAIL From: SIZE=3556 >> MAIL From: SIZE=3556 ,... Deferred: 421 #4.4.5 Too many connections from your host. ... while talking to mx1.sgict.gov.sg.: >> RCPT To: ... Deferred: 451 Internal resource temporarily unavailable - https://community.mimecast.com/docs/DOC-1369#451 [ua9l52zPPIa0fLnVbu2ZAQ.uk254] >>> DATA >> RCPT To: ... Deferred: 451 Internal resource temporarily unavailable - https://community.mimecast.com/docs/DOC-1369#451 [bkZhCTvfPNWYEwgrOmuKVw.uk265] >>> DATA >> RCPT To: ... Deferred: 452 Too many recipients received this hour >>> RCPT To: ... Deferred: 452 Too many recipients received this hour >>> RCPT To: ... Deferred: 452 Too many recipients received this hour >>> RCPT To: ... Deferred: 452 Too many recipients received this hour >>> RCPT To: ... Deferred: 452 Too many recipients received this hour >>> RCPT To: ... Deferred: 452 Too many recipients received this hour >>> RCPT To: ... Deferred: 452 Too many recipients received this hour >>> RCPT To: ... Deferred: 452 Too many recipients received this hour >>> RCPT To: ... Deferred: 452 Too many recipients received this hour >>> RCPT To: ... Deferred: 452 Too many recipients received this hour ... while talking to mail11.hmail.sg.: ... Deferred: 421 mail21.hmail.sg closing connection ... while talking to qiye163mx01.mxmail.netease.com.: >>> DATA