Mittlerweile habe ich vom Adressaten das Logfile erhalten:
von xxx.yyy an aaa.bbb...
03.03.2021 16:16:06 vexmbbe05.pnet.ch vexmbzf03 a28b5a50-4d2d-4f93-a457-a9fda067f16a SMTP HARECEIVE 146587233814291 <023201d7103f$ee6f3ad0$cb4db070$@arkons.ch> c660eab0-8369-47f8-94be-08d8de57448e { *E-Mail placeholder* } {} 18487 1 Irgendwas *E-Mail placeholder* *E-Mail placeholder* Incoming None {[DeliveryPriority, Low], [PrioritizationReason, ShadowRedundancy], [AccountForest, pnet.ch]} Email 15.01.2176.002
03.03.2021 16:18:03 vexmbzf03 ExplicitlyDiscarded;a28b5a50-4d2d-4f93-a457-a9fda067f16a SMTP HADISCARD 146587233814291 <023201d7103f$ee6f3ad0$cb4db070$@arkons.ch> c660eab0-8369-47f8-94be-08d8de57448e { *E-Mail placeholder* } {} 18487 1 Irgendwas *E-Mail placeholder* *E-Mail placeholder* Incoming None {[DeliveryPriority, Low], [PrioritizationReason, ShadowRedundancy], [AccountForest, pnet.ch]} Email 15.01.2176.002
03.03.2021 16:16:06 vexmbbe05 vexmbzf03.pnet.ch=250 2.6.0 <023201d7103f$ee6f3ad0$cb4db070$@arkons.ch> [InternalId=146587233814291, Hostname=vexmbzf03.pnet.ch] Queued mail for redundancy SMTP HAREDIRECT 130236293318402 <023201d7103f$ee6f3ad0$cb4db070$@arkons.ch> c660eab0-8369-47f8-94be-08d8de57448e { *E-Mail placeholder* } {} 18343 1 Irgendwas *E-Mail placeholder* *E-Mail placeholder* Incoming None {[DeliveryPriority, Normal], [AccountForest, pnet.ch]} Email 15.01.2176.002
03.03.2021 16:16:06 172.18.18.26 vexmbbe01.pnet.ch 172.18.18.32 vexmbbe05 08D8DDA6A5BBD7E3;2021-03-03T15:16:06.699Z;0 VEXMBBE05\Default VEXMBBE05 SMTP RECEIVE 130236293318402 <023201d7103f$ee6f3ad0$cb4db070$@arkons.ch> c660eab0-8369-47f8-94be-08d8de57448e { *E-Mail placeholder* } {} 18343 1 Irgendwas *E-Mail placeholder* *E-Mail placeholder* Incoming 194.41.216.147 0cA: None {[ProxyHop1, vexmbbe01.pnet.ch(172.18.18.26)], [MessageValue, MediumHigh], [Replication, vexmbzf03], [FirstForestHop, vexmbbe05.pnet.ch]...} Email 15.01.2176.002
03.03.2021 16:16:06 vexmbbe05 ROUTING RESOLVE 130236293318402 <023201d7103f$ee6f3ad0$cb4db070$@arkons.ch> c660eab0-8369-47f8-94be-08d8de57448e { *E-Mail placeholder* } {} 18343 1 *E-Mail placeholder* Irgendwas *E-Mail placeholder* *E-Mail placeholder* Incoming None {[DeliveryPriority, Normal], [AccountForest, pnet.ch]} Email 15.01.2176.002
03.03.2021 16:16:06 vexmbbe05 CatContentConversion AGENT AGENTINFO 130236293318402 <023201d7103f$ee6f3ad0$cb4db070$@arkons.ch> c660eab0-8369-47f8-94be-08d8de57448e { *E-Mail placeholder* } {} 18503 1 Irgendwas *E-Mail placeholder* *E-Mail placeholder* Incoming 194.41.216.147 None {[TRA, ETRP|ruleId=4b43a2f2-653a-4c6e-9849-44f3fc308e83|st=2020-07-13T12:06:28.0000000Z|ExecW=0|ExecC=0|Conditions=MRP,X-SP-S,0;LMP,X-SP-S,0], [TRA, ETRP|ruleId=c1ed5e1e-e6f6-493c-83ba-141950990797|st=2020-07-13T12:06:28.0000000Z|ExecW=0|ExecC=0|Conditions=CP,X-SP-S,0], [TRA, ETRP|ruleId=34a087e8-18a9-4b98-8e2b-33b79e48b27f|st=2019-08-05T11:21:51.0000000Z|ExecW=0|ExecC=0|Conditions=IIP,F,0;IMOP,F,0;DIP,F,0;DIP,M.SD,0], [TRA, ETRP|ruleId=a8f3915d-5a6d-4416-b7f9-eccc3fe2f2c5|st=2021-02-15T12:13:21.0000000Z|ExecW=0|ExecC=0|Conditions=IP,F,0;IMOP,M.F,0]...} Email 15.01.2176.002
03.03.2021 16:16:07 172.18.18.32 vexmbbe05 172.17.18.53 vexedbe01.pnet.ch;250 2.6.0 <023201d7103f$ee6f3ad0$cb4db070$@arkons.ch> [InternalId=146501334467558, Hostname=vexedbe01.pnet.ch] 22830 bytes in 0.090, 246,704 KB/sec Queued mail for delivery;ClientSubmitTime: Intra-Organization SMTP Send Connector SMTP SEND 130236293318402 <023201d7103f$ee6f3ad0$cb4db070$@arkons.ch> c660eab0-8369-47f8-94be-08d8de57448e { *E-Mail placeholder* } {250 2.1.5 Recipient OK} 22605 1 Irgendwas *E-Mail placeholder* *E-Mail placeholder* Incoming 2021-03-03T15:16:06.664Z;LSRV=vexmbbe05.pnet.ch:TOTAL-HUB=0.921|SMR=0.154(SMRDE=0.003|SMRC=0.150(SMRCL=0.100|X-SMRCR=0.156))|CAT=0.653(CATOS=0.001(CATSM=0.001(CATSM-Unified Group Post Sent Item Routing Agent=0.001))|CATRESL=0.003|CATORES=0.015(CATRS=0.015(CATRS-Prioritization Agent=0.002|CATRS-Index Routing Agent=0.012))|CATOC=0.630(CATCM=0.630(CATCM-McAfeeTxRoutingAgent=0.629)))|QDI=0.004|SMSC=0.017|SMS=0.094 00:00:00.9720000 LocalServer {[E2ELatency, 0.973], [MsgRecipCount, 1], [IncludeInSla, True], [Microsoft.Exchange.Transport.MailRecipient.RequiredTlsAuthLevel, Opportunistic]...} Email 15.01.2176.002
Vielleicht hilft das weiter.