Fetch a Range of POP3 Messages

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Demonstrates the Chilkat MailMan.FetchRange method, which retrieves a range of messages from the POP3 mailbox and appends them to an EmailBundle. The arguments are keepOnServer, headersOnly, numBodyLines, a zero-based inclusive startIndex and endIndex, and the EmailBundle. This example fetches the first five messages.

// Demonstrates the MailMan.FetchRange method, which retrieves a range of messages from the
// POP3 mailbox and appends them to an EmailBundle.  The arguments are keepOnServer,
// headersOnly, numBodyLines, startIndex, endIndex, and the EmailBundle.  The indexes are
// zero-based and inclusive.

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

// Configure the POP3 server connection.
mailman.set_mail_host("pop.example.com");
mailman.set_mail_port(995);
mailman.set_pop_ssl(true);
mailman.set_pop_username("user@example.com");
mailman.set_pop_password("myPassword");

// Fetch the first 5 messages (indexes 0 through 4), full bodies, leaving them on the server.
// keepOnServer=true, headersOnly=false (fetch the entire message).
// Note: numBodyLines only applies when headersOnly is true (it sets how many lines of the
// body to include along with the headers).  When headersOnly is false, the entire message
// is fetched and numBodyLines is ignored.
let bundle = chilkat::EmailBundle::new();

if mailman.fetch_range(true, false, 0, 0, 4, &bundle).is_err() {
    println!("{}", mailman.last_error_text());
    return;
}

let n = bundle.message_count();
println!("Fetched {} messages.", n);

let email = chilkat::Email::new();
for i in 0..n {
    let _ = bundle.email_at(i, &email).is_ok();
    println!("{}", email.subject());
}

// Note: Explicitly connecting/authenticating is optional.  Chilkat MailMan automatically
// connects and authenticates -- using the property settings above -- whenever a server
// operation requires it.  Calling the explicit connect/authenticate methods can still be
// helpful to determine whether a failure occurs while connecting or while authenticating.