Rust Requires Chilkat v11.0.0+

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. Rust

let email = chilkat::Email::new();

email.set_subject("Test");
email.set_from("joe@example.com");
email.set_body("This is a test");
let _ = email.add_to("", "recipient@example.com");

println!("{}", email.get_mime().unwrap_or_default());
println!("");
println!("-------------------------------------------------------------");
println!("");

// 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)

let xml = chilkat::Xml::new();
xml.set_tag("DeliveryStatusFields");
xml.new_child2("Final-Recipient", "rfc822; recipient@example.com");
xml.new_child2("Action", "failed");
xml.new_child2("Status", "5.1.2");
xml.new_child2("Diagnostic-Code", "smtp; 550 5.1.2 Host unknown (Domain name not found)");
let dt_now = chilkat::DateTime::new();
let _ = dt_now.set_from_current_system_time();
xml.new_child2("Last-Attempt-Date", &dt_now.get_as_rfc822(true).unwrap_or_default());

let header_only = true;
let sb_text = chilkat::StringBuilder::new();
let _ = sb_text.append("This is an automatically generated Delivery Status Notification.\r\n\r\n");
let _ = sb_text.append("Delivery to the following recipient failed permanently:\r\n\r\n");
let _ = sb_text.append("    recipient@example.com\r\n\r\n");
let _ = sb_text.append("Technical details of permanent failure:\r\n");
let _ = sb_text.append("DNS Error: Domain name not found\r\n");

let explain = sb_text.get_as_string().unwrap_or_default();

let dsn_email = chilkat::Email::new();
if email.to_dsn(&explain, &xml.get_xml().unwrap_or_default(), header_only, &dsn_email).is_err() {
    println!("{}", email.last_error_text());
    return;
}

println!("{}", dsn_email.get_mime().unwrap_or_default());

// 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--