(C) Office365 Send Email from Shared Mailbox

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Demonstrates how to send email from a shared mailbox, from smtp.office365.com using OAuth2 authentication.

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#include <C_CkJsonObject.h>
#include <C_CkMailMan.h>
#include <C_CkEmail.h>

void ChilkatSample(void)
    {
    HCkJsonObject jsonToken;
    BOOL success;
    HCkMailMan mailman;
    HCkEmail email;

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

    // An Office365 OAuth2 access token must first be obtained prior
    // to running this code.

    // Getting the OAuth2 access token for the 1st time requires the O365 account owner's 
    // interactive authorizaition via a web browser.  Afterwards, the access token
    // can be repeatedly refreshed automatically.

    // See the following examples for getting and refreshing an OAuth2 access token

    // Get Office365 SMTP/IMAP/POP3 OAuth2 Access Token
    // Refresh Office365 SMTP/IMAP/POP3 OAuth2 Access Token

    // First get our previously obtained OAuth2 access token.
    jsonToken = CkJsonObject_Create();
    success = CkJsonObject_LoadFile(jsonToken,"qa_data/tokens/office365.json");

    mailman = CkMailMan_Create();

    CkMailMan_putSmtpHost(mailman,"smtp.office365.com");
    CkMailMan_putSmtpPort(mailman,587);
    CkMailMan_putStartTLS(mailman,TRUE);

    // In case of shared mailbox access using OAuth, the application needs to obtain the access token on behalf of a user
    // but replace the SMTP username with the email address of the shared mailbox.

    // Login using the shared mailbox email address for the username, and the access token for the password.
    // See Office 365 SASL XOAUTH2 format 

    // Use your Office365 email address for the SmtpUsername.
    CkMailMan_putSmtpUsername(mailman,"SHARED_MAILBOX_EMAIL_ADDRESS");
    CkMailMan_putOAuth2AccessToken(mailman,CkJsonObject_stringOf(jsonToken,"access_token"));

    // Create a new email object
    email = CkEmail_Create();

    CkEmail_putSubject(email,"This is a test");
    CkEmail_putBody(email,"This is a test");
    CkEmail_putFrom(email,"MY_NAME <SHARED_MAILBOX_EMAIL_ADDRESS>");
    success = CkEmail_AddTo(email,"John Doe","somebody@example.com");

    // Call SendEmail to connect to the SMTP server and send.
    // The connection (i.e. session) to the SMTP server remains
    // open so that subsequent SendEmail calls may use the
    // same connection.  
    success = CkMailMan_SendEmail(mailman,email);
    if (success != TRUE) {
        printf("%s\n",CkMailMan_lastErrorText(mailman));
        CkJsonObject_Dispose(jsonToken);
        CkMailMan_Dispose(mailman);
        CkEmail_Dispose(email);
        return;
    }

    success = CkMailMan_CloseSmtpConnection(mailman);
    if (success != TRUE) {
        printf("Connection to SMTP server not closed cleanly.\n");
    }

    printf("Mail Sent!\n");


    CkJsonObject_Dispose(jsonToken);
    CkMailMan_Dispose(mailman);
    CkEmail_Dispose(email);

    }