Xojo Plugin

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. Xojo Plugin

Dim success As Boolean
success = False

Dim email As New Chilkat.Email

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

System.DebugLog(email.GetMime())
System.DebugLog("")
System.DebugLog("-------------------------------------------------------------")
System.DebugLog("")

// 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)

Dim xml As 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)"
Dim dtNow As New Chilkat.CkDateTime
success = dtNow.SetFromCurrentSystemTime()
xml.NewChild2 "Last-Attempt-Date",dtNow.GetAsRfc822(True)

Dim headerOnly As Boolean
headerOnly = True
Dim sbText As New Chilkat.StringBuilder
success = sbText.Append("This is an automatically generated Delivery Status Notification." + EndOfLine.Windows + EndOfLine.Windows)
success = sbText.Append("Delivery to the following recipient failed permanently:" + EndOfLine.Windows + EndOfLine.Windows)
success = sbText.Append("    recipient@example.com" + EndOfLine.Windows + EndOfLine.Windows)
success = sbText.Append("Technical details of permanent failure:" + EndOfLine.Windows)
success = sbText.Append("DNS Error: Domain name not found" + EndOfLine.Windows)

Dim explain As String
explain = sbText.GetAsString()

Dim dsnEmail As New Chilkat.Email
success = email.ToDsn(explain,xml.GetXml(),headerOnly,dsnEmail)
If (success = False) Then
    System.DebugLog(email.LastErrorText)
    Return
End If

System.DebugLog(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--