C#

Create DSN (Delivery Status Notification) Email

See more Email Object Examples

Demonstrates how to create a DSN (Delivery Status Notification) Email having the format as defined in RFC 3464. C#

bool success = false;

Chilkat.Email email = new Chilkat.Email();

email.Subject = "Test";
email.From = "joe@example.com";
email.Body = "This is a test";
email.AddTo("","recipient@example.com");

Debug.WriteLine(email.GetMime());
Debug.WriteLine("");
Debug.WriteLine("-------------------------------------------------------------");
Debug.WriteLine("");

// This is the email we just created:

// MIME-Version: 1.0
// Date: Mon, 12 May 2025 11:13:15 -0500
// Message-ID: <917FA49F75544EF51948B0A52F403B925B51073F@SLICE>
// Content-Type: text/plain; charset=us-ascii; format=flowed
// Content-Transfer-Encoding: 7bit
// X-Priority: 3 (Normal)
// Subject: Test
// From: joe@example.com
// To: recipient@example.com
// 
// This is a test

// -----------------------------------------------------------------
// Convert the above email into a DSN (Delivery Status Notification)

Chilkat.Xml xml = new Chilkat.Xml();
xml.Tag = "DeliveryStatusFields";
xml.NewChild2("Final-Recipient","rfc822; recipient@example.com");
xml.NewChild2("Action","failed");
xml.NewChild2("Status","5.1.2");
xml.NewChild2("Diagnostic-Code","smtp; 550 5.1.2 Host unknown (Domain name not found)");
Chilkat.CkDateTime dtNow = new Chilkat.CkDateTime();
dtNow.SetFromCurrentSystemTime();
xml.NewChild2("Last-Attempt-Date",dtNow.GetAsRfc822(true));

bool headerOnly = true;
Chilkat.StringBuilder sbText = new Chilkat.StringBuilder();
sbText.Append("This is an automatically generated Delivery Status Notification.\r\n\r\n");
sbText.Append("Delivery to the following recipient failed permanently:\r\n\r\n");
sbText.Append("    recipient@example.com\r\n\r\n");
sbText.Append("Technical details of permanent failure:\r\n");
sbText.Append("DNS Error: Domain name not found\r\n");

string explain = sbText.GetAsString();

Chilkat.Email dsnEmail = new Chilkat.Email();
success = email.ToDsn(explain,xml.GetXml(),headerOnly,dsnEmail);
if (success == false) {
    Debug.WriteLine(email.LastErrorText);
    return;
}

Debug.WriteLine(dsnEmail.GetMime());

// Here's the MIME of the DNS email we just created:
// -------------------------------------------------

// Content-Type: multipart/report; report-type="delivery-status"; boundary="------------060100020300020303000802"
// 
// --------------060100020300020303000802
// Content-Type: text/plain; charset=windows-1252; format=flowed
// Content-Transfer-Encoding: 7bit
// 
// This is an automatically generated Delivery Status Notification.
// 
// Delivery to the following recipient failed permanently:
// 
//     recipient@example.com
// 
// Technical details of permanent failure:
// DNS Error: Domain name not found
// 
// --------------060100020300020303000802
// Content-Type: message/delivery-status
// 
// Final-Recipient: rfc822; recipient@example.com
// Action: failed
// Status: 5.1.2
// Diagnostic-Code: smtp; 550 5.1.2 Host unknown (Domain name not found)
// Last-Attempt-Date: Mon, 12 May 2025 11:30:39 -0500
// 
// --------------060100020300020303000802
// Content-Type: text/rfc822-headers; charset=windows-1252
// 
// MIME-Version: 1.0
// Date: Mon, 12 May 2025 11:30:39 -0500
// Message-ID: <B8E6875D582A78AE779FC0B46ACC8C858CEAF608@SLICE>
// Content-Type: text/plain; charset=us-ascii; format=flowed
// Content-Transfer-Encoding: 7bit
// X-Priority: 3 (Normal)
// Subject: Test
// From: joe@example.com
// To: recipient@example.com
// --------------060100020300020303000802--