Rust

Save an Email to a .eml File

Demonstrates the Chilkat Email.SaveEml method, which converts the email object to EML and saves it to a file. An EML file contains the complete RFC822/MIME message — headers, bodies, related items, and attachments. This example builds a message and saves it.

Background: Saving as .eml writes the message in the universal MIME format that virtually every mail client can open, making it ideal for archiving, sharing, or handing a message to another program. It is the counterpart to LoadEml. A saved .eml also retains Chilkat's CKX- metadata headers (a way to store your own metadata with the email; they are always stripped before an email is sent), so .eml is the recommended way to persist a message even within Chilkat-based software. A separate Chilkat XML format (SaveXml) exists as an alternative, but offers no metadata advantage over .eml.

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// Demonstrates the SaveEml method, which converts the email object to EML and saves it to
// a file.  An EML file contains the complete RFC822/MIME message, including headers,
// bodies, related items, and attachments.

let email = chilkat::Email::new();
email.set_subject("Save as EML");
email.set_from("alice@example.com");
let _ = email.add_to("Bob", "bob@example.com");
email.set_body("Hello, this message will be saved as a .eml file.");

// Save the email to a .eml file.
if email.save_eml("qa_output/message.eml").is_err() {
    println!("{}", email.last_error_text());
    return;
}

println!("Saved to message.eml.");

// Note: The path "qa_output/..." is a relative local filesystem path,
// relative to the current working directory of the running application.