Rust

Convert HTML Web Page to Email and Send

See more MHT / HTML Email Examples

Converts an HTML page at a URL into an email with embedded images and sends it. Rust

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

let mailman = chilkat::MailMan::new();

// The MHT component can be used to convert an HTML page
// from a URL, file, or in-memory HTML into an email
// with embedded images and style sheets.
let mht = chilkat::Mht::new();

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

// There are two ways of embedding images in emails: with CIDs
// and without.  When using CIDs, the IMG SRC attributes use
// urls that begin with "cid:" and the corresponding image
// embedded within the email includes a Content-ID header field.
// When not using CIDs, the IMG SRC attribute can have a URL,
// path, etc. and the corresponding image embedded within
// the email has a matching Content-Location header field.

// When testing with GMail, if CIDs are used the email will
// be displayed with images blocked (by default) unless
// the user allows them to be displayed.  Without CIDs,
// the images are automatically displayed.

// When testing with Eudora, Mozilla Thunderbird, and Outlook Express, 
// embedded images display correctly with our without CIDs.

// When testing with Yahoo! Mail, embedded images display OK.
// However, the Yahoo! Mail user has the option of blocking
// images.  If this is turned on, the CID images will still 
// display correctly even though images are blocked.  Why?
// It's because when viewing the email there is no external
// HTTP request to fetch an image.  Therefore, a spammer 
// cannot get an indication that you've read the email. 
// However, if CIDs are not used, the images are blocked by 
// any Yahoo! Mail user that has image blocking turned on --
// even though the images are embedded.

// I haven't tested Hotmail yet...
// Regardless, there is no perfect solution.  If CIDs are used,
// GMail users may block your embedded images, if CIDs are not
// used, Yahoo! Mail users may block your embedded images.

// I recommend setting using CIDs.  This is what Mozilla Thunderbird
// does by default, and it's the more clear an unambiguous way
// to indicate that images are indeed embedded.
mht.set_use_cids(true);

let Ok(eml_str) = mht.get_eml("http://www.bonairefishing.com/") else {
    println!("{}", mht.last_error_text());
    return;
};

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

email.set_subject("Test HTML email");

// This example is tested in:
// Outlook 2000, Eudora 7, Mozilla Thunderbird 1.5.0.9, Outlook Express 6, GMail, Yahoo Mail
let _ = email.add_to("Chilkat Support", "support@chilkatsoft.com").is_ok();

// Note: Chilkat does not regularly check our GMail and Yahoo
// email accounts.  Please send support email to support@chilkatsoft.com
let _ = email.add_to("Chilkat on Yahoo", "chilkat_software@yahoo.com").is_ok();
let _ = email.add_to("Chilkat on GMail", "chilkat.support@gmail.com").is_ok();

email.set_from("chilkat@live.com");

// Send email using smtp.live.com
mailman.set_smtp_host("smtp.live.com");
mailman.set_smtp_username("chilkat@live.com");
mailman.set_smtp_password("myPassword");
mailman.set_smtp_port(587);
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!("{}", mailman.last_error_text());
    return;
}

println!("HTML Email Sent!");