使用啟用了 Microsoft 反垃圾郵件的 MailKit 獲取已讀回執
[英]Get read-receipt with MailKit with Microsoft anti-spam enabled
問題描述
我正在使用 IMAP 連接到 Office 365 郵件服務器。 我們的系統管理員啟用了反垃圾郵件，因此任何從外部收到的郵件都會被轉換：我們只收到轉發郵件而不是原始郵件。
使用 Thunderbird 或 Outlook Web 訪問，我可以看到原始郵件作為附加的 EML 文件。
但是當我嘗試解析郵件中的附件時，我在這些郵件中找不到附件。 如果我收到帶有真實附件的 email，我可以找到它作為附件。
我嘗試使用 message.ToString() 來獲取我收到的完整消息：
Received: from *****.prod.outlook.com (*****)
by *****.prod.outlook.com with HTTPS; Thu, 11 Aug 2022
13:37:42 +0000
Received: from *****.PROD.OUTLOOK.COM (*****) by
*****.prod.outlook.com (*****) with
Microsoft SMTP Server (version=TLS1_2,
cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5504.23; Thu, 11 Aug
2022 13:37:41 +0000
Received: from *****.prod.protection.outlook.com
(*****) by *****.outlook.office365.com
(*****) with Microsoft SMTP Server (version=TLS1_2,
cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5525.11 via Frontend
Transport; Thu, 11 Aug 2022 13:37:41 +0000
Authentication-Results: spf=none (sender IP is *****)
smtp.helo=*****.aznetwork.eu; dkim=none (message not signed)
header.d=none;dmarc=none action=none header.from=aznetwork.eu;compauth=pass
reason=105
Received-SPF: None (protection.outlook.com: *****.aznetwork.eu does not
designate permitted sender hosts)
Received: from *****.aznetwork.eu (*****) by
*****.mail.protection.outlook.com (*****) with Microsoft SMTP
Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id
15.20.5525.11 via Frontend Transport; Thu, 11 Aug 2022 13:37:41 +0000
Received: from localhost (localhost.localdomain [127.0.0.1])
by *****.aznetwork.eu (Postfix) with ESMTP id 053BC1C631E
for <recipient@mail.com>; Thu, 11 Aug 2022 15:37:41 +0200 (CEST)
Received: from *****.aznetwork.eu ([127.0.0.1])
by localhost (*****.aznetwork.eu [127.0.0.1]) (amavisd-new, port 10032)
with ESMTP id Tin75ip0CVd1 for <recipient@mail.com>;
Thu, 11 Aug 2022 15:37:40 +0200 (CEST)
Received: from localhost (localhost.localdomain [127.0.0.1])
by *****.aznetwork.eu (Postfix) with ESMTP id B55251C6446
for <recipient@mail.com>; Thu, 11 Aug 2022 15:37:40 +0200 (CEST)
X-Virus-Scanned: amavisd-new at *****.aznetwork.eu
Received: from *****.aznetwork.eu ([127.0.0.1])
by localhost (*****.aznetwork.eu [127.0.0.1]) (amavisd-new, port 10026)
with ESMTP id 4lpOVXL1yFKw for <recipient@mail.com>;
Thu, 11 Aug 2022 15:37:40 +0200 (CEST)
Received: from *****.aznetwork.eu (*****.aznetwork.priv [*****])
by *****.aznetwork.eu (Postfix) with ESMTP id 9E4CB1C631E
for <recipient@mail.com>; Thu, 11 Aug 2022 15:37:40 +0200 (CEST)
Date: Thu, 11 Aug 2022 15:37:40 +0200 (CEST)
From: Sender Name <sender@mail.com>
To: recipient@mail.com
Message-ID: <1682353652.2846324.1660225060639.JavaMail.zimbra@aznetwork.eu>
Subject: [EXTERNE] Read-Receipt: Mail Subject
Auto-Submitted: auto-replied (zimbra; read-receipt)
Precedence: bulk
Return-Path: <>
X-MS-Exchange-Organization-ExpirationStartTime: 11 Aug 2022 13:37:41.4732
(UTC)
X-MS-Exchange-Organization-ExpirationStartTimeReason: OriginalSubmit
X-MS-Exchange-Organization-ExpirationInterval: 1:00:00:00.0000000
X-MS-Exchange-Organization-ExpirationIntervalReason: OriginalSubmit
X-MS-Exchange-Organization-Network-Message-Id:
384141c3-c532-4391-771a-08da7b9eaa12
X-EOPAttributedMessage: 0
X-EOPTenantAttributedMessage: 873b62a6-6fcf-467d-8380-ce41a1d6da9f:0
X-MS-Exchange-Organization-MessageDirectionality: Incoming
X-MS-PublicTrafficType: Email
X-MS-Exchange-Organization-AuthSource:
*****.prod.protection.outlook.com
X-MS-Exchange-Organization-AuthAs: Anonymous
X-MS-Office365-Filtering-Correlation-Id: 384141c3-c532-4391-771a-08da7b9eaa12
X-MS-TrafficTypeDiagnostic: AM9PR02MB7641:EE_
Content-Type: multipart/mixed;
boundary="_16f20566-32fe-437d-8fb6-e2fcbadabd01_"
X-MS-Exchange-Organization-SCL: 1
X-Microsoft-Antispam: BCL:0;
X-Forefront-Antispam-Report:
CIP:*****;CTRY:FR;LANG:fr;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:*****.aznetwork.eu;PTR:*****.aznetwork.eu;CAT:NONE;SFS:(13230016)(36756003)(7696005)(6266002)(26005)(564344004)(356005)(7636003)(336012)(426003)(2616005)(66574015)(42882007)(83380400001)(78352004)(5660300002)(8676002)(6916009)(1096003);DIR:INB;
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Aug 2022 13:37:41.3795
(UTC)
X-MS-Exchange-CrossTenant-Network-Message-Id: 384141c3-c532-4391-771a-08da7b9eaa12
X-MS-Exchange-CrossTenant-Id: 873b62a6-6fcf-467d-8380-ce41a1d6da9f
X-MS-Exchange-CrossTenant-AuthSource:
*****.prod.protection.outlook.com
X-MS-Exchange-CrossTenant-AuthAs: Anonymous
X-MS-Exchange-CrossTenant-FromEntityHeader: Internet
X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM9PR02MB7641
X-MS-Exchange-Transport-EndToEndLatency: 00:00:01.2537846
X-MS-Exchange-Processed-By-BccFoldering: 15.20.5525.010
X-Microsoft-Antispam-Mailbox-Delivery:
ucf:0;jmr:0;auth:0;dest:I;ENG:(910001)(944506458)(944626604)(920097)(930097);
X-Microsoft-Antispam-Message-Info:
=?iso-8859-1?somebase64data=
MIME-Version: 1.0
--_16f20566-32fe-437d-8fb6-e2fcbadabd01_
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
ATTENTION: Ce message est originaire de l'ext=E9rieur de ***. Ne pas clique=
r sur les liens internet ou ouvrir les pi=E8ces jointes =E0 moins que vous =
ne connaissiez l'auteur ou sachiez que le contenu est sain (pas de virus).
--_16f20566-32fe-437d-8fb6-e2fcbadabd01_
Content-Type: message/rfc822
X-MS-Exchange-Organization-InternalOrgSender: True
Received: from *****.PROD.OUTLOOK.COM (*****) by
*****.prod.outlook.com (*****) with
Microsoft SMTP Server (version=TLS1_2,
cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5504.23; Thu, 11 Aug
2022 13:37:41 +0000
Received: from *****.prod.protection.outlook.com
(*****) by *****.outlook.office365.com
(*****) with Microsoft SMTP Server (version=TLS1_2,
cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5525.11 via Frontend
Transport; Thu, 11 Aug 2022 13:37:41 +0000
Authentication-Results: spf=none (sender IP is *****)
smtp.helo=*****.aznetwork.eu; dkim=none (message not signed)
header.d=none;dmarc=none action=none header.from=aznetwork.eu;
Received-SPF: None (protection.outlook.com: *****.aznetwork.eu does not
designate permitted sender hosts)
Received: from *****.aznetwork.eu (*****) by
*****.mail.protection.outlook.com (*****) with Microsoft SMTP
Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id
15.20.5525.11 via Frontend Transport; Thu, 11 Aug 2022 13:37:41 +0000
Received: from localhost (localhost.localdomain [127.0.0.1])
by *****.aznetwork.eu (Postfix) with ESMTP id 053BC1C631E
for <recipient@mail.com>; Thu, 11 Aug 2022 15:37:41 +0200 (CEST)
Received: from *****.aznetwork.eu ([127.0.0.1])
by localhost (*****.aznetwork.eu [127.0.0.1]) (amavisd-new, port 10032)
with ESMTP id Tin75ip0CVd1 for <recipient@mail.com>;
Thu, 11 Aug 2022 15:37:40 +0200 (CEST)
Received: from localhost (localhost.localdomain [127.0.0.1])
by *****.aznetwork.eu (Postfix) with ESMTP id B55251C6446
for <recipient@mail.com>; Thu, 11 Aug 2022 15:37:40 +0200 (CEST)
X-Virus-Scanned: amavisd-new at *****.aznetwork.eu
Received: from *****.aznetwork.eu ([127.0.0.1])
by localhost (*****.aznetwork.eu [127.0.0.1]) (amavisd-new, port 10026)
with ESMTP id 4lpOVXL1yFKw for <recipient@mail.com>;
Thu, 11 Aug 2022 15:37:40 +0200 (CEST)
Received: from *****.aznetwork.eu (*****.aznetwork.priv [*****])
by *****.aznetwork.eu (Postfix) with ESMTP id 9E4CB1C631E
for <recipient@mail.com>; Thu, 11 Aug 2022 15:37:40 +0200 (CEST)
Date: Thu, 11 Aug 2022 15:37:40 +0200 (CEST)
From: Sylvain DEVIDAL <sender@mail.com>
To: recipient@mail.com
Message-ID: <1682353652.2846324.1660225060639.JavaMail.zimbra@aznetwork.eu>
Subject: [EXTERNE] Read-Receipt: Mail Subject
Content-Type: multipart/report;
boundary="----=_Part_2846322_558173291.1660225060636"; report-type=disposition-notification
Auto-Submitted: auto-replied (zimbra; read-receipt)
Precedence: bulk
Return-Path: <>
X-MS-Exchange-Organization-OriginalArrivalTime: 11 Aug 2022 13:37:41.3795
(UTC)
X-MS-Exchange-Organization-ExpirationStartTime: 11 Aug 2022 13:37:41.4732
(UTC)
X-MS-Exchange-Organization-ExpirationStartTimeReason: OriginalSubmit
X-MS-Exchange-Organization-ExpirationInterval: 1:00:00:00.0000000
X-MS-Exchange-Organization-ExpirationIntervalReason: OriginalSubmit
X-MS-Exchange-Organization-Network-Message-Id:
384141c3-c532-4391-771a-08da7b9eaa12
X-MS-Exchange-Organization-OriginalClientIPAddress: *****
X-MS-Exchange-Organization-OriginalServerIPAddress: *****
X-EOPAttributedMessage: 0
X-EOPTenantAttributedMessage: 873b62a6-6fcf-467d-8380-ce41a1d6da9f:0
X-MS-Exchange-Organization-TargetResourceForest: *****.prod.outlook.com
X-MS-Exchange-Organization-OrgEopForest: EUR01
X-MS-Exchange-Organization-MessageDirectionality: Incoming
X-MS-Exchange-Organization-Id: 873b62a6-6fcf-467d-8380-ce41a1d6da9f
X-MS-Exchange-Organization-FFO-ServiceTag: EUR01B
X-MS-Exchange-Organization-Cross-Premises-Headers-Processed:
*****.prod.protection.outlook.com
X-MS-Exchange-Organization-ConnectingIP: *****
X-MS-Exchange-Organization-ConnectingEHLO: *****.aznetwork.eu
X-MS-Exchange-Organization-AS-LastExternalIp: *****
X-MS-Exchange-Organization-Originating-Country: FR
X-MS-Exchange-Organization-OriginalEnvelopeRecipients: recipient@mail.com
X-MS-Exchange-Organization-PtrDomains: *****.aznetwork.eu
X-MS-Exchange-Organization-EhloAndPtrDomain:
*****.aznetwork.eu;*****.aznetwork.eu
X-MS-Exchange-Organization-MxPointsToUs: true
X-MS-Exchange-Organization-RecipientMxInfo-PFAFD:
recipientdomain.com#*****.mail.protection.outlook.com
X-MS-Exchange-Organization-CompAuthRes: pass
X-MS-Exchange-Organization-CompAuthReason: 105
X-MS-Exchange-Organization-SpoofDetection-Frontdoor-DisplayDomainName:
aznetwork.eu
X-MS-Exchange-Organization-Auth-ExtendedDmarcStatus: Pass
X-MS-Exchange-Organization-SenderRep-Score: 3
X-MS-Exchange-Organization-SenderRep-Data:
IpClassSmallGrayBest_SmallGrayBest_unknown
X-MS-Exchange-Organization-VBR-Class: SmallGrayBest
X-MS-Exchange-Organization-HMATPModel-Spf: 5
X-MS-Exchange-Organization-HMATPModel-Recipient:
*****
X-MS-Exchange-Organization-TransportTrafficType: Email
X-MS-PublicTrafficType: Email
X-MS-Exchange-Organization-OrderedPrecisionLatencyInProgress:
LSRV=*****.PROD.OUTLOOK.COM:TOTAL-FE=0.093|SMR-PEN=0.082(RENV=0.068);2022-08-11T13:37:41.721Z
X-MS-Exchange-Organization-MessageLatency:
SRV=*****.eop-EUR01.prod.protection.outlook.com:TOTAL-FE=0.247|SMR-PEN=0.221(RENV=0.031(SMRRC=0.029(SMRRC-TenantAttributionAndInboundConnectorAgent=0.026
))|REOH=0.189(SMREH=0.127(SMREH-Protocol Filter Agent=0.124)))|SMS=0.029
X-MS-Exchange-Organization-MessageLatency:
SRV=*****.PROD.OUTLOOK.COM:TOTAL-FE=0.116|SMR-PEN=0.082(RENV=0.068)|SMS=0.023(SMSC=0.033)
X-MS-Exchange-Forest-ArrivalHubServer: *****.prod.outlook.com
X-MS-Exchange-Organization-AuthSource:
*****.prod.protection.outlook.com
X-MS-Exchange-Organization-AuthAs: Anonymous
X-MS-Exchange-Organization-FromEntityHeader: Internet
X-MS-Exchange-Organization-MessageScope: 7ca5d36b-aa6e-4988-8ce2-ebc9e7a7fc2a
X-MS-Exchange-Forest-MessageScope: 7ca5d36b-aa6e-4988-8ce2-ebc9e7a7fc2a
X-MS-Exchange-Organization-Antispam-ProtocolFilterHub-ScanContext:
ProtocolFilterHub:SmtpOnEndOfData;
X-MS-Office365-Filtering-Correlation-Id: 384141c3-c532-4391-771a-08da7b9eaa12
X-MS-Exchange-Organization-P2SenderDisplayNamePII:
H101(Oo2uoTVO0nYrZjTS6UNDuqjuYq+ejtD0u3d/6RR1MgI=)
X-MS-Exchange-Organization-P2SenderPII:
*****
X-MS-Exchange-Organization-PFAHub-Total-Message-Size: 9121
X-MS-Exchange-Organization-OriginalSize: 9121
X-MS-TrafficTypeDiagnostic: AM9PR02MB7641:EE_
X-MS-Exchange-Organization-HygienePolicy: Premium
X-MS-Exchange-Organization-ReplicationInfo:
ReplicaId=9de80d70-aee0-b1f9-8fed-3baa9e7bda08;ReplicatingServerFqdn=*****.eurprd02.prod.outlook.com
X-MS-Exchange-Forest-Language: fr
X-MS-Exchange-Forest-IndexAgent-0:
Somebase64data=
X-MS-Exchange-Forest-IndexAgent: 1 833
X-MS-Exchange-Forest-EmailMessageHash: 6E6C2B22,31F80CB7
X-MS-Exchange-Organization-PhishSim-Rules-Execution-History:
336d57ef-0937-4345-9ee7-7488d99e1eee
X-MS-Exchange-Organization-Antispam-PreContentFilter-PolicyLoadTime:
PSOSUB:6;PSOSUBLOAD:5;PSOSUBRUN:0;PSOSUBCOUNT:1;SMORES:2;SMORESLOAD:1;SMORESRUN:0;SMORESCOUNT:0;SAORES:4;SAORESLOAD:1;SLORES:2;APORES:22;APORESLOAD:1;APORESRUN:20;APORESCOUNT:2;RSORES:1;SLORESLOAD:1;
X-MS-Exchange-Organization-AttachmentDetailsHeaderStamp-Success: 1.0
X-MS-Exchange-Organization-AttachmentDetails:
0:EpUTydEBwSuS9oq8FNAFHYcMPGvyaOa9tpBsGPTlB4k=:U:Text:QVRUMDAwMDQ=::#:False:::N:::N::N:None:
X-MS-Exchange-Organization-MessageFingerprint:
A0DBCBFD.2F1B0759.C2DDF092.B4130E24.200A4
X-MS-Exchange-Organization-AttachmentDetailsInfo-ChunkCount: 1
X-MS-Exchange-Organization-AttachmentDetailsInfo-0:
[{"ID":0,"FS":308,"HFH":"EpUTydEBwSuS9oq8FNAFHYcMPGvyaOa9tpBsGPTlB4k=","FE":"","CEXT":[],"CFT":[],"AF":0,"AFT":"{784:\"ATT00004\",789:\"text\"}"}]
X-MS-Exchange-Organization-FeatureTable:
{385:"aznetwork.eu",452:1,453:1,454:"4A71A110@kp1.fr",504:7,506:4,507:5,508:"none",509:"aznetwork.eu",510:"*****.aznetwork.eu",651:2,653:1,656:1,721:"2.37",722:"2.35",742:1,743:3,744:1,748:"sign",749:"Latn",758:"A0DBC8FE.2F5B0759.F0DDB08F.A01F8E26.20082",781:1,782:8,1010:0,1011:"1830FF39|60572074|",1101:"0.194"}
X-MS-Exchange-Organization-MetadataFeatureTable:
{756:0,757:0,1010:0,1011:"1830FF39|60572074|",1036:"199167"}
X-MS-Exchange-Organization-Antispam-PreContentFilter-ScanContext:
CategorizerOnSubmitted;CategorizerOnResolved;
X-MS-Exchange-Organization-AVScannedByV2: true
X-MS-Exchange-Organization-AVScanComplete: true
X-MS-Exchange-Organization-ExternalRoutingTopologyAnalysis:
X-MS-Exchange-Organization-Recipient-Limit-Verified: True
X-MS-Exchange-Organization-TotalRecipientCount: 1
X-MS-Exchange-Organization-HVERecipientsForked: 1.0
X-MS-Exchange-Organization-AntiPhishPolicy: Default_kp1
X-MS-Exchange-Organization-ASDirectionalityType: 1
X-MS-Exchange-Organization-Boomerang-Verdict: None
X-MS-Exchange-Organization-HMATPModel-DkimAuthStatus: 7
X-MS-Exchange-Organization-HMATPModel-DmarcAuthStatus: 4
X-MS-Exchange-Organization-Cross-Session-Cache:
=?utf-8?somebase64data=
X-MS-Exchange-Organization-Cross-Session-Cache:
01xSupported=1;TMD_SS=1;TMD_AOT=3433;TMD_CSUM=5377;TMD_DTAET=1;TMD_ES=0;TMD_TT=0;TMD_DMNSPM=8914;TMD_DMSPM=338;TMD_PSATP=0;TMD_PS=1939;TMD_SCNT=5;TMD_TSATP=0;TMD_TS=0;TMD_ATPP2=False;TMD_CI=fr-FR;TMD_CD=2013-03-15
09:53:51.000;TMD_NEWT=0;TMD_NEWTT=0;TMD_QS=1;TR_SS=1;TR_SMAS=0;TR_TMAS=0;TR_UMAS=0;TR_TTU24H=0;TR_TT24H=0;TR_AFWR24H=18;TR_NDRSPMR24H=0;TR_R1H=315;TR_R24H=2709;TR_SPMR1H=0;TR_SPMR24H=0;TR_UP1R1H=0;TR_UP1R24H=0;TR_UP1SPMR24H=0;TR_QS=1;BR_V=None;DIR=1;PTRO=aznetwork.eu;P2O=aznetwork.eu;P_CAUTH=pass;P_CAUTHR=105;SIP2BCLAP=-1;SIP2BCLAF=-1;P2BCL=
X-MS-Exchange-Organization-Rules-Execution-History:
95544e5a-848e-428b-b1a3-43568aa659bf%%%5a9c7fc7-bc74-434e-81a5-8fe8f957dcbb%%%22b9f62e-47d3-4bb9-87f7-b1c42aa1f5e3%%%79dacf70-5b24-4672-8325-97733f56b4e3%%%572c1ac3-7cd0-4e7c-8a3b-99003d82e392
MIME-Version: 1.0
------=_Part_2846322_558173291.1660225060636
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable
Le mail envoy=C3=A9 le 11 ao=C3=BBt 2022 =C3=A0 15:37:26 GMT+02:00 au desti=
nataire sender@mail.com avec l=E2=80=99objet "Mail=
subject" a =C3=A9t=C3=A9 affich=C3=A9. Cela ne signifie aucunement =
que ce mail ait =C3=A9t=C3=A9 lu (ou compris).=
------=_Part_2846322_558173291.1660225060636
Content-Type: message/disposition-notification; charset=utf-8
Content-Transfer-Encoding: 7bit
Reporting-UA: 78.252.48.37; ZimbraWebClient - GC104 (Win)/8.8.15_GA_4257
Original-Recipient: rfc822;sender@mail.com
Final-Recipient: rfc822;sender@mail.com
Original-Message-ID: <YA0XNMBBLHU4.N87S2N70CKU81@dev-crm22-upd1>
Disposition: manual-action/MDN-sent-manually; displayed
------=_Part_2846322_558173291.1660225060636--
--_16f20566-32fe-437d-8fb6-e2fcbadabd01_--
（對不起，長代碼）
您可以在第 147 行看到它實際上包含原始消息，類型為“report”（它是一個已讀回執）。
但是無論我嘗試什么，我都無法解析它。
這是我當前的代碼：（如果從郵箱加載，則消息 id 是我加載的郵件消息）
public static void ProcessReadReceiptNotification(MimeMessage message)
{
/// This part is the "standard way" to find a read-reciept, but it doesn't work
var report = message.Body as MultipartReport;
if (report == null || report.ReportType == null || !report.ReportType.Equals("disposition-notification", StringComparison.OrdinalIgnoreCase))
{
// this is not a read receipt notification message...
Console.WriteLine("this is not a read receipt notification message... will parse parts");
/// Then I tried to iterate all parts of the mail then load the message
foreach (MimeEntity part in message.BodyParts)
{
Console.WriteLine($"A part of type {part.ContentType.MimeType} is found");
if (part.ContentType.MimeType == "message/rfc822")
{
/// Here part.Message private property contains the message
Console.WriteLine("This is a message, we load it");
using MemoryStream ms = new();
part.WriteTo(ms);
ms.Seek(0, SeekOrigin.Begin);
MimeMessage msg = MimeMessage.Load(ms);
/// Here my msg object is empty, or at least doesn't contain message data (subject, body, etc.)
//Console.WriteLine(msg.Body.ToString());
report = msg.Body as MultipartReport;
Console.WriteLine(report?.ToString());
/*
return ProcessReadReceiptNotification(msg);
*/
}
}
Console.Write("Nothing found...");
return;
}
else
{
Console.WriteLine($"Report Type : {report.ReportType}");
// process the report
foreach (var mds in report.OfType<MessageDispositionNotification>())
{
Console.WriteLine($"{mds.Content}");
var messageId = mds.Fields.Single(a => a.Field == "Original-Message-ID");
if (messageId is not null)
{
Console.Write($"Le message {messageId.Value}");
}
var readStatus = mds.Fields.Single(a => a.Field == "Disposition");
if (readStatus is not null)
{
var index = readStatus.Value.IndexOf(";");
Console.WriteLine($" a été {readStatus.Value.Substring(index + 1)}.");
}
return;
}
return;
}
}
我怎樣才能加載這個正文部分並識別它是一個已讀回執（帶有它的原始消息 ID）？
我發現在part.Message私有屬性中我可以看到原始消息。 但我無法訪問它。 part.WriteTo(ms)不會復制消息。
2 個解決方案
解決方案1
0 2022-08-12 09:09:05
我終於找到了如何閱讀原始消息。
而不是將部分加載為MimeMessage我只需將其加載為MultipartReport ...
foreach (MimeEntity part in message.BodyParts)
{
Console.WriteLine($"A part of type {part.ContentType.MimeType} is found");
if (part.ContentType.MimeType == "message/rfc822")
{
Console.WriteLine("This is a message, we load it");
using MemoryStream ms = new();
part.WriteTo(ms, true);
ms.Seek(0, SeekOrigin.Begin);
report = MimeEntity.Load(ms) as MultipartReport;
Console.WriteLine(report?.ToString());
}
}
解決方案2
0 2022-08-14 16:21:07
無需將內容寫入 stream 即可再次重新解析。
您需要做的就是：
foreach (MimeEntity part in message.BodyParts)
{
Console.WriteLine($"A part of type {part.ContentType.MimeType} is found");
// MessageParts are message/rfc822 (or equivalent such as message/news
// or message/global which is the UTF-8 version of message/rfc822)
//
// Never use case-sensitive string comparisons like
// part.ContentType.MimeType == "message/rfc822" because MIME does not
// restrict things to lowercase. Instead, the recommended way of checking
// for an exact mime-type is part.ContentType.IsMimeType("message", "rfc822")
// or
// part.ContentType.MimeType.Equals("message/rfc822", StringComparison.OrdinalIgnoreCase).
if (part is MessagePart rfc822)
{
Console.WriteLine("This is a message, lets see if the body is a multipart/report");
if (rfc822.Body is MultipartReport report)
{
// handle the multipart/report which is already in a parsed state
}
}
}
c＃MailKit - 閱讀收據
聲明:本站的技術帖子網頁，遵循CC BY-SA 4.0協議，如果您需要轉載，請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.