(Objective-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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#import <NSString.h>
#import <CkoMailMan.h>
#import <CkoEmail.h>

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

BOOL success;
NSString *oauth2_access_token = @"some_previously_obtained_token";

CkoMailMan *mailman = [[CkoMailMan alloc] init];

// Set the properties for the SMTP server, whatever they may be..
mailman.SmtpHost = @"smtp.example.com";
mailman.SmtpPort = [NSNumber numberWithInt:587];
mailman.StartTLS = YES;

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

// Create a new email object
CkoEmail *email = [[CkoEmail alloc] init];

email.Subject = @"This is a test";
email.Body = @"This is a test";
email.From = @"Joe Example <joe@example.com>";
[email AddTo: @"Chilkat Admin" emailAddress: @"admin@chilkatsoft.com"];

// Connect to the server indicated by the SmtpHost property
success = [mailman SmtpConnect];
if (success != YES) {
    NSLog(@"%@",mailman.LastErrorText);
    return;
}

// Authenticate using XOAUTH2 (using the OAuth2AccessToken)
success = [mailman SmtpAuthenticate];
if (success != YES) {
    NSLog(@"%@",mailman.LastErrorText);
    return;
}

success = [mailman SendEmail: email];
if (success != YES) {
    NSLog(@"%@",mailman.LastErrorText);
    return;
}

NSLog(@"%@",@"Email sent.");

[mailman CloseSmtpConnection];