(C#) SMTP XOAUTH2 Authentication

Demonstrates how to authenticate using an OAuth2 access token. This example assumes you have already obtained the access token and now wish to use it in an SMTP session.

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

bool success;
string oauth2_access_token = "some_previously_obtained_token";

Chilkat.MailMan mailman = new Chilkat.MailMan();

// Set the properties for the SMTP server, whatever they may be..
mailman.SmtpHost = "smtp.example.com";
mailman.SmtpPort = 587;
mailman.StartTLS = true;

mailman.SmtpUsername = "myLogin";
mailman.OAuth2AccessToken = oauth2_access_token;

// Create a new email object
Chilkat.Email email = new Chilkat.Email();

email.Subject = "This is a test";
email.Body = "This is a test";
email.From = "Joe Example <joe@example.com>";
email.AddTo("Chilkat Admin","admin@chilkatsoft.com");

// Connect to the server indicated by the SmtpHost property
success = mailman.SmtpConnect();
if (success != true) {
    Debug.WriteLine(mailman.LastErrorText);
    return;
}

// Authenticate using XOAUTH2 (using the OAuth2AccessToken)
success = mailman.SmtpAuthenticate();
if (success != true) {
    Debug.WriteLine(mailman.LastErrorText);
    return;
}

success = mailman.SendEmail(email);
if (success != true) {
    Debug.WriteLine(mailman.LastErrorText);
    return;
}

Debug.WriteLine("Email sent.");

mailman.CloseSmtpConnection();