Rust

Send High Priority Email (SMTP, X-Priority header)

Demonstrates how to send high-priorty email (or lower priority email) by setting the X-Priority header field. Rust

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

// The mailman object is used for sending and receiving email.
let mailman = chilkat::MailMan::new();

// Set the SMTP server (obviously, use your SMTP server, not chilkatsoft.com)
mailman.set_smtp_host("smtp.chilkatsoft.com");

// Set the SMTP login/password (if required)
mailman.set_smtp_username("myUsername");
mailman.set_smtp_password("myPassword");

// Create a new email object
let email = chilkat::Email::new();

email.set_subject("This is a test");
email.set_body("This is a test");
email.set_from("Chilkat Support <support@chilkatsoft.com>");
let _ = email.add_to("Chilkat Admin", "admin@chilkatsoft.com").is_ok();
// To add more recipients, call AddTo, AddCC, or AddBcc once per recipient.

// To send high-priority email, 
// add the X-Priority header field with the value "1" 
// to indicate highest-priority.
// A value of "3" is normal, which is the same as not setting
// the X-Priority header at all, and "5" is the lowest. 
// "2" and "4" are in-betweens.

// Microsoft Outlook might add the following headers when
// sending high-priority email.

// X-Priority: 1 (Highest) 
// X-MSMail-Priority: High 
// Importance: High 

// The X-Priority header alone is enough to make the email high-priority.

email.add_header_field("X-Priority", "1");

// Call SendEmail to connect to the SMTP server and send.
// The connection (i.e. session) to the SMTP server remains
// open so that subsequent SendEmail calls may use the
// same connection.  
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!");