(Tcl) Create DSN (Delivery Status Notification) Email

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Note: This example requires Chilkat v11.0.0 or greater.

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load ./chilkat.dll

set email [new_CkEmail]

CkEmail_put_Subject $email "Test"
CkEmail_put_From $email "joe@example.com"
CkEmail_put_Body $email "This is a test"
CkEmail_AddTo $email "" "recipient@example.com"

puts [CkEmail_getMime $email]
puts 
puts "-------------------------------------------------------------"
puts 

# 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)

set xml [new_CkXml]

CkXml_put_Tag $xml "DeliveryStatusFields"
CkXml_NewChild2 $xml "Final-Recipient" "rfc822; recipient@example.com"
CkXml_NewChild2 $xml "Action" "failed"
CkXml_NewChild2 $xml "Status" "5.1.2"
CkXml_NewChild2 $xml "Diagnostic-Code" "smtp; 550 5.1.2 Host unknown (Domain name not found)"
set dtNow [new_CkDateTime]

CkDateTime_SetFromCurrentSystemTime $dtNow
CkXml_NewChild2 $xml "Last-Attempt-Date" [CkDateTime_getAsRfc822 $dtNow 1]

set headerOnly 1
set sbText [new_CkStringBuilder]

CkStringBuilder_Append $sbText "This is an automatically generated Delivery Status Notification.\r\n\r\n"
CkStringBuilder_Append $sbText "Delivery to the following recipient failed permanently:\r\n\r\n"
CkStringBuilder_Append $sbText "    recipient@example.com\r\n\r\n"
CkStringBuilder_Append $sbText "Technical details of permanent failure:\r\n"
CkStringBuilder_Append $sbText "DNS Error: Domain name not found\r\n"

set explain [CkStringBuilder_getAsString $sbText]

set dsnEmail [new_CkEmail]

set success [CkEmail_ToDsn $email $explain [CkXml_getXml $xml] $headerOnly $dsnEmail]
if {$success == 0} then {
    puts [CkEmail_lastErrorText $email]
    delete_CkEmail $email
    delete_CkXml $xml
    delete_CkDateTime $dtNow
    delete_CkStringBuilder $sbText
    delete_CkEmail $dsnEmail
    exit
}

puts [CkEmail_getMime $dsnEmail]

# 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--

delete_CkEmail $email
delete_CkXml $xml
delete_CkDateTime $dtNow
delete_CkStringBuilder $sbText
delete_CkEmail $dsnEmail