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(Unicode C) Create DSN (Delivery Status Notification) EmailDemonstrates how to create a DSN (Delivery Status Notification) Email having the format as defined in RFC 3464.
#include <C_CkEmailW.h> #include <C_CkXmlW.h> void ChilkatSample(void) { HCkEmailW email; BOOL success; HCkXmlW xml; const wchar_t *xmlStr; BOOL bHeaderOnly; const wchar_t *humanReadableExplanation; HCkEmailW dsnEmail; email = CkEmailW_Create(); // A DSN email is a report about the attempt to delivery // an email. It is usually a report that indicates failure or // or a delay in delivery. The DSN is typically sent back to // the sender of an email. // IMPORTANT: // Note: Please be careful in sending automated DSN's. // It is important to be aware of an issue called "backscatter". // See the Wikipedia article here: http://en.wikipedia.org/wiki/Backscatter_%28e-mail%29 // The CreateDsn method will be called to create a new // DSN email based upon the email object calling CreateDsn. // The email object instance used to call CreateDsn would // typically be an email received from a POP3 or IMAP server. // In this case, to simplify the example, we'll load the email // from a .eml file. // This example will be creating a DSN for "someEmail.eml" success = CkEmailW_LoadEml(email,L"someEmail.eml"); if (success != TRUE) { wprintf(L"%s\n",CkEmailW_lastErrorText(email)); CkEmailW_Dispose(email); return; } // The DSN created by CreateDsn will contain a // "message/delivery-status" MIME sub-part that will // be composed of a number of name-value pairs. // See RFC 3464 ( http://tools.ietf.org/html/rfc3464 ) // The name-value content for this part is passed // as XML to CreateDsn. This part of the example // prepares the XML: xml = CkXmlW_Create(); // For this example, we're just adding a few name-value pairs. // These should not be considered to be correct, required or // even sensible -- it's simply for the example. CkXmlW_putTag(xml,L"DeliveryStatusFields"); CkXmlW_NewChild2(xml,L"Status",L"5.1.2 (bad destination system: no such domain)"); CkXmlW_NewChild2(xml,L"Diagnostic-Code",L"smtp; Permanent failure: no such domain"); CkXmlW_NewChild2(xml,L"X-BounceCategory",L"bad-domain"); xmlStr = CkXmlW_getXml(xml); // The last argument to be passed to CreateDsn will be a boolean // indicating whether to include the entire MIME of the calling // email object in the DSN, or only the header. // It may make sense to include the entire email for small emails, // but for large emails (with large attachments) it's probably // best to make the DSN header-only. bHeaderOnly = TRUE; // The first argument to be passed to CreateDsn will // be a human-readable explanation that will be placed // into the 1st MIME part of the DSN (see RFC 3464). humanReadableExplanation = L"Blah blah blah. The delivery of this email failed. Blah blah blah"; // OK, we're ready to create DSN.... dsnEmail = CkEmailW_CreateDsn(email,humanReadableExplanation,xmlStr,bHeaderOnly); if (CkEmailW_getLastMethodSuccess(email) == FALSE) { wprintf(L"%s\n",CkEmailW_lastErrorText(email)); CkEmailW_Dispose(email); CkXmlW_Dispose(xml); return; } // Show the MIME of the source (original) email: wprintf(L"%s\n",CkEmailW_getMime(email)); wprintf(L"**************************************\n"); // Show the MIME of the DSN email: wprintf(L"%s\n",CkEmailW_getMime(dsnEmail)); CkEmailW_Dispose(dsnEmail); // Sample output showing the MIME of the original email, // and the DSN email created based upon it: // X-Account-Key: account2 // X-UIDL: 0D154945439D42BD80F180F6D9DE4D82 // Received: with MailEnable Postoffice Connector; // Tue, 21 Jun 2011 09:21:23 -0400 // Received: from qmta14.emeryville.ca.mail.comcast.net ([76.96.227.212]) by chilkatsoft.com with MailEnable ESMTP; // Tue, 21 Jun 2011 09:21:22 -0400 // Received: from omta03.emeryville.ca.mail.comcast.net ([76.196.30.27]) by qmta14.emeryville.ca.mail.comcast.net with comcast id yd4k1g0050b6N64AEdLW9x; // Tue, 21 Jun 2011 13:20:30 +0000 // Received: from [127.0.0.1] ([67.175.202.103]) by omta03.emeryville.ca.mail.comcast.net with comcast id ydLV1g00n2EMkZ78PdLWxi; // Tue, 21 Jun 2011 13:20:31 +0000 // Message-ID: <4E009AA4.3090205@chilkatsoft.com> // Date: Tue, 21 Jun 2011 08:20:36 -0500 // From: Chilkat Software <admin@chilkatsoft.com> // User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.17) Gecko/20110414 Thunderbird/3.1.10 // MIME-Version: 1.0 // To: Chilkat Support <support@chilkatsoft.com> // Subject: test 123 // Content-Type: text/plain; charset=ISO-8859-1; format=flowed // Content-Transfer-Encoding: 7bit // Return-Path: <> // X-Antivirus: avast! (VPS 110621-0, 06/21/2011), Inbound message // X-Antivirus-Status: Clean // // This is a test 123 // // // // ************************************** // Content-Type: multipart/report; report-type=delivery-status; // boundary="------------070202040604030701060106" // // --------------070202040604030701060106 // Content-Type: text/plain // Content-Transfer-Encoding: 7bit // // Blah blah blah. The delivery of this email failed. Blah blah blah // --------------070202040604030701060106 // Content-Type: message/delivery-status // // Status: 5.1.2 (bad destination system: no such domain) // Diagnostic-Code: smtp; Permanent failure: no such domain // X-BounceCategory: bad-domain // // --------------070202040604030701060106 // Content-Type: text/rfc822-headers // // X-Account-Key: account2 // X-UIDL: 0D154945439D42BD80F180F6D9DE4D82 // Received: with MailEnable Postoffice Connector; // Tue, 21 Jun 2011 09:21:23 -0400 // Received: from qmta14.emeryville.ca.mail.comcast.net ([76.96.227.212]) by chilkatsoft.com with MailEnable ESMTP; // Tue, 21 Jun 2011 09:21:22 -0400 // Received: from omta03.emeryville.ca.mail.comcast.net ([76.196.30.27]) by qmta14.emeryville.ca.mail.comcast.net with comcast id yd4k1g0050b6N64AEdLW9x; // Tue, 21 Jun 2011 13:20:30 +0000 // Received: from [127.0.0.1] ([67.175.202.103]) by omta03.emeryville.ca.mail.comcast.net with comcast id ydLV1g00n2EMkZ78PdLWxi; // Tue, 21 Jun 2011 13:20:31 +0000 // Message-ID: <4E009AA4.3090205@chilkatsoft.com> // Date: Tue, 21 Jun 2011 08:20:36 -0500 // From: Chilkat Software <admin@chilkatsoft.com> // User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.17) Gecko/20110414 Thunderbird/3.1.10 // MIME-Version: 1.0 // To: Chilkat Support <support@chilkatsoft.com> // Subject: test 123 // Content-Type: text/plain; charset=ISO-8859-1; format=flowed // Content-Transfer-Encoding: 7bit // Return-Path: <> // X-Antivirus: avast! (VPS 110621-0, 06/21/2011), Inbound message // X-Antivirus-Status: Clean // --------------070202040604030701060106-- // // CkEmailW_Dispose(email); CkXmlW_Dispose(xml); } |
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