Vielen Dank für schnelle Antworten, anbei der Message Track:
Die Domänen, IPs und Sender/Empfänger wurden aus Datenschutzgründen rausgenommen.
{
  "sender": {
  },
  "headerFrom": {
  
  },
  "mailId": "dc3b4405-0edc-4ac2-b166-c462e91ef10a",
  "messageId": "<>",
  "size": 35739,
  "subject": "WG: Wattline",
  "signed": "None",
  "encrypted": "None",
  "sent": "2022-07-01T09:57:10.13+02:00",
  "processingTime": "00:00:03.9400000",
  "status": "PermanentlyBlocked",
  "ruleName": "Eingehend_Whiteliste",
  "scl": -10,
  "validationStatus": "RejectPermanent",
  "rejectReason": "Policy",
  "cyrenReferenceId": "str=0001.0A702F22.62BEA89E.004D,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0",
  "processingGatewayRole": "",
  "receiveConnectorName": "SMTP on all addresses",
  "clientIPAddress": "",
  "wasReceivedFromRelayServer": false,
  "detailsWereDeleted": false,
  "urlSafeguardInfoWasDeleted": false,
  "senderConnectionSecurity": {
    "tlsProtocol": "Tls12",
    "hashAlgorithm": "Sha384",
    "keyExchangeAlgorithm": "DiffieHellmanEllipticKey",
    "keyExchangeAlgorithmStrength": 256,
    "cipherAlgorithm": "Aes256"
  },
  "deliveryAttempts": [
    {
      "recipient": "",
      "deliveryDate": "2022-07-01T09:57:10.13+02:00",
      "status": "PermanentlyBlocked",
      "dane": "None",
      "statusMessage": "5.7.1 This email was rejected because it violates our security policy\r\n5.7.1  Die Dateianhänge image002.emz sind nicht erlaubt.",
      "sendConnector": ""
    }
  ],
  "levelOfTrust": {
    "domainBonus": 0,
    "addressPairingBonus": 100,
    "messageIdBonus": 0,
    "subjectBonus": 0,
    "dsnPoints": 0,
    "mailIsTrusted": true,
    "scl": -10,
    "senderDomainIsFreeMailer": false,
    "isSenderAuthenticated": true,
    "addressPairingIsWildcardEntry": false,
    "wasHeaderFromAddressUsedForValidation": false
  },
  "actions": [
    {
      "name": "Projekt Heimdall (Vorschau)",
      "time": "00:00:00.1900000",
      "decision": "Pass"
    },
    {
      "name": "Inhaltsfilter",
      "time": "00:00:00",
      "decision": "RejectPermanent",
      "message": "Die Dateianhänge image002.emz sind nicht erlaubt."
    },
    {
      "name": "URL Safeguard",
      "time": "00:00:00",
      "decision": "Pass"
    },
    {
      "name": "S/MIME- und PGP-Überprüfung sowie Entschlüsselung (vorzugsweise eingehend)",
      "time": "00:00:00",
      "decision": "Pass"
    },
    {
      "name": "Malware-Scanner",
      "time": "00:00:00.6400000",
      "decision": "Pass"
    },
    {
      "name": "CSA-Whitelist",
      "time": "00:00:00",
      "decision": "Pass"
    }
  ],
  "filters": [
    {
      "name": "Cyren AntiSpam",
      "time": "00:00:00",
      "scl": 0
    },
    {
      "name": "Realtime Blocklists",
      "time": "00:00:02.6300000",
      "scl": 0
    },
    {
      "name": "Wortübereinstimmungen",
      "time": "00:00:00.3100000",
      "scl": 0
    },
    {
      "name": "Spam URI Realtime Blocklists",
      "time": "00:00:00.3200000",
      "scl": 0
    },
    {
      "name": "Reputationsfilter",
      "time": "00:00:00.2000000",
      "scl": 0
    },
    {
      "name": "Cyren IP Reputation",
      "time": "00:00:00.3700000",
      "scl": 0
    }
  ],
  "operations": [
    {
      "created": "2022-07-01T09:56:18.973+02:00",
      "operation": {
        "type": "MalwareScan",
        "data": "{\"$type\":\"MalwareScanValidationEntry\",\"cyrenZeroHourClassification\":{\"spamClassification\":\"Unknown\",\"virusClassification\":\"Unknown\",\"threatCount\":0,\"detectedThreatType\":\"None\",\"detectedThreatAccuracy\":\"None\",\"threatName\":\"\"},\"action\":\"Pass\",\"infectedMailParts\":[],\"availableScanners\":\"Cyren, Filebased, CyrenZeroHour\",\"hasAdministrativeNotificationBeenSent\":false,\"childValidationEntries\":[],\"typeName\":\"MalwareScan\"}"
      }
    },
    {
      "created": "2022-07-01T09:56:18.973+02:00",
      "operation": {
        "type": "AttachmentManagement",
        "data": "{\"$type\":\"AttachmentManagementValidationEntry\",\"mailWasBlocked\":true,\"actions\":[{\"Filename\":\"image002.emz\",\"Action\":{\"actionType\":\"Block\",\"isAttachmentPasswordRequired\":false,\"name\":\"Reject entire mail\",\"removeActiveContentFromPdf\":false,\"convertWordDocumentToPdf\":false,\"convertExcelDocumentToPdf\":false,\"originalDocumentRetention\":\"Discard\",\"requireAdministrativeApproval\":false,\"sendAdministrativeNotification\":true,\"keepAttachmentOnWebPortal\":false,\"analyzeInSandbox\":false,\"uploadToSandbox\":true,\"sandboxMaliciousAttachmentAction\":\"None\",\"addInformationalPrefacePage\":true},\"Recipients\":[{\"localPart\":\"\",\"domain\":\"\"}],\"IsContentDisarmed\":false,\"MailWasPutOnHold\":false,\"IsAttachmentPasswordProtected\":false}],\"mailWasPutOnHold\":false,\"tnefAttachmentConvertedForRecipients\":[],\"isTnefAttachmentConverted\":false,\"childValidationEntries\":[],\"typeName\":\"AttachmentManagement\"}"
      }
    },
    {
      "created": "2022-07-01T09:56:18.973+02:00",
      "operation": {
        "type": "DnsValidationEntry",
        "data": "{\"$type\":\"DnsValidationEntry\",\"senderAddress\":\"\",\"hasMailFromDomainARecord\":true,\"mailFromDomainARecordValue\":\" ()\",\"hasPtrRecord\":true,\"isPtrRecordValid\":true,\"ptrRecordValue\":\"\",\"isPtrRecordForwardLookupValid\":true,\"ptrRecordForwardLookupValue\":\"\",\"childValidationEntries\":[],\"typeName\":\"DnsValidationEntry\"}"
      }
    },
    {
      "created": "2022-07-01T09:56:18.973+02:00",
      "operation": {
        "type": "CyrenIpReputationFilterEntry",
        "data": "{\"$type\":\"CyrenIpReputationFilterEntry\",\"ipAddress\":\"\",\"referenceId\":\"tid=0001.0A702F8D.62BEA89B.0058\",\"riskLevel\":0,\"recommendedAction\":\"Accept\",\"ipRange\":\"\",\"ipClass\":\"G1\",\"validBulkRatio\":-1,\"childValidationEntries\":[],\"typeName\":\"CyrenIpReputationFilterEntry\"}"
      }
    },
    {
      "created": "2022-07-01T09:56:18.973+02:00",
      "operation": {
        "type": "DmarcValidationEntry",
        "data": "{\"$type\":\"DmarcValidationEntry\",\"effectivePolicy\":\"None\",\"rfc5322FromDomain\":\"\",\"validationResult\":\"BestGuessPass\",\"organizationalDomain\":\"\",\"dkimResult\":[{\"failures\":\"None\",\"authenticatedDomain\":\"\"}],\"spfResult\":[{\"result\":\"Pass\",\"domain\":\"\"},{\"result\":\"Pass\",\"domain\":\"\"}],\"spfValidationStatus\":\"Validated\",\"dkimAlignment\":true,\"spfAlignment\":true,\"childValidationEntries\":[],\"typeName\":\"DmarcValidationEntry\"}"
      }
    },
    {
      "created": "2022-07-01T09:56:18.973+02:00",
      "operation": {
        "type": "SenderRecipientValidationEntry",
        "data": "{\"$type\":\"SenderRecipientValidationEntry\",\"localAddresses\":[],\"ownedDomainsInHeaderFromDisplayName\":[],\"dnsValidationResultWithAddress\":{\"result\":\"Success\"},\"headerFromContainsAngleBracketsWithInvalidEmailAddress\":false,\"headerFromIsInvalidWithEmptyMailFrom\":false,\"headerFromContainsMultipleAddresses\":false,\"headerFromDisplayNameContainsDomainDifferentFromEmailAddress\":false,\"headerToContainsAtSignOutsideOfEmailAddress\":false,\"headerToContainsAngleBracketsWithInvalidEmailAddress\":false,\"headerToIsEmpty\":false,\"headerFromOrToContainMultipleUnicodeLanguagePlanes\":false,\"headerToDoesNotContainLocalUser\":false,\"childValidationEntries\":[],\"typeName\":\"SenderRecipientValidationEntry\"}"
      }
    }
  ]
}