The original message was received at Tue, 28 Jan 2025 09:36:38 +0100 from [165.154.252.200] ----- The following addresses had permanent fatal errors ----- (reason: 451 Internal resource temporarily unavailable - https://community.mimecast.com/docs/DOC-1369#451 [fgwBxsTkNXKTfxiOsYNulA.uk80]) (reason: 451 4.7.500 Server busy. Please try again later from [83.138.65.30]. (AS780082) [HK3PEPF00000221.apcprd03.prod.outlook.com 2025-01-29T08:58:01.384Z 08DD3E34534403FC]) (reason: 551 5.7.1 Message blacklisted for spam content GSIIC-N06) (reason: 551 5.7.1 Message blacklisted for spam content GSIIC-N06) ----- Transcript of session follows ----- ... while talking to eu-smtp-inbound-2.mimecast.com.: >>> RCPT To: ... Deferred: 451 Internal resource temporarily unavailable - https://community.mimecast.com/docs/DOC-1369#451 [d8qYPOsEMdaXf2brksc4Qg.uk7] >>> DATA >> RCPT To: ... Deferred: 451 Internal resource temporarily unavailable - https://community.mimecast.com/docs/DOC-1369#451 [fgwBxsTkNXKTfxiOsYNulA.uk80] >>> DATA ... Deferred: Connection refused by intes.com.cn. ... while talking to mx-apac.mail.gm0.yahoodns.net.: >>> MAIL From: SIZE=3052 ,... 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 ... while talking to mxn.mxhichina.com.: >>> DATA >> DATA ... Deferred: 451 4.7.500 Server busy. Please try again later from [83.138.65.30]. (AS780082) [HK3PEPF00000221.apcprd03.prod.outlook.com 2025-01-29T08:58:01.384Z 08DD3E34534403FC] ... while talking to smtp.uc.pt.: >>> DATA