Rust

Create Non-Multipart Email with XML Body that is an Attachment

See more SMTP Examples

Creates an email where the only body is a binary WAV file. The technique used in the example could be applied to other binary files, such as PDF, MS-WORD docs, Excel docs, etc. Rust

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// The goal of this example is to create an email that has this MIME format,
// where the body of the email is XML using base64 encoding, 
// and the Content-Type and Content-Disposition are set as indicated.

// Date: Wed, 23 Aug 2023 09:01:52 +0200 (CEST)
// From: joe@example1.com
// Subject: [v=EMCS.NL][a=NL****][k=****][s=0]
// To: mary@example2.com
// MIME-Version: 1.0
// Content-Type: application/octet-stream; charset=us-ascii; name=6bd8dfe259b3a42c90a28a82b5fc6e77.txt
// Content-Transfer-Encoding: Base64
// Content-Disposition: attachment; filename=6bd8dfe259b3a42c90a28a82b5fc6e77.txt
// Message-Id: <......>
// 
// <multi-line base64 encoded XML here>

let _ = true;

let xml_body = "<ie:IE801 xmlns:ie=\"urn:publicid:-:EC:DGTAXUD:EMCS:PHASE4:IE801:V3.01\" xmlns:tms=\"urn:publicid:-:EC:DGTAXUD:EMCS:PHASE4:TMS:V3.01\">....</ie:IE801>".to_string();

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

// Add subject, TO, FROM, etc.
email.set_subject("[v=EMCS.NL][a=NL****][k=****][s=0]");
email.set_from("joe@example1.com");
let _ = email.add_to("Mary", "mary@example2.com").is_ok();

email.set_body(&xml_body);

email.add_header_field("Content-Transfer-Encoding", "Base64");
email.add_header_field("Content-Type", "application/octet-stream; charset=us-ascii; name=6bd8dfe259b3a42c90a28a82b5fc6e77.txt");
email.add_header_field("Content-Disposition", "attachment; filename=6bd8dfe259b3a42c90a28a82b5fc6e77.txt");

// Your email is ready to send
let mailman = chilkat::MailMan::new();

mailman.set_smtp_host("smtp.my_mail_server.com");
mailman.set_smtp_username("myUsername");
mailman.set_smtp_password("myPassword");
mailman.set_smtp_port(465);
mailman.set_smtp_ssl(true);
mailman.set_start_tls(true);

if mailman.send_email(&email).is_err() {
    println!("{}", mailman.last_error_text());
    return;
}

if mailman.close_smtp_connection().is_err() {
    println!("Connection to SMTP server not closed cleanly.");
}

println!("Mail Sent!");