Send Email using Hotmail/Live/Outlook/Office365 in Managed C++/CLI

In previous section, I introduced how to send email using Yahoo account. In this section, I will introduce how to use your Hotmail/MSN Live/Outlook.com/Office365 account to send email in Managed C++.

Introduction

Hotmail/Live/Outlook.com SMTP server address is smtp.live.com. It requires explicit SSL (TLS) connection to do user authentication, and you should use your Hotmail/Live/Outlook.com email address as the user name for ESMTP authentication. For example: your email is myid@hotmail.com, and then the user name should be myid@hotmail.com.

Server Port SSL/TLS
smtp.live.com 25, 587 TLS

Note

Remarks: All of samples in this section are based on first section: A simple Managed C++/CLI project. To compile and run the following example codes successfully, please click here to learn how to create the test project and add reference of EASendMail to your project.

[Managed C++/CLI Example - Send email using Hotmail/MSN Live account over TLS connection]

The following example codes demonstrate how to send email using Hotmail/MSN Live account.

Note

To get the full sample projects, please refer to Samples section.

#include "stdafx.h"

using namespace System;
using namespace EASendMail;

int main(array<System::String ^> ^args)
{
    try
    {
        SmtpMail ^oMail = gcnew SmtpMail("TryIt");
        // Your Hotmail email address
        oMail->From = "liveid@hotmail.com";
        // Set recipient email address, please change it to yours
        oMail->To = "support@emailarchitect.net";

        // Set email subject
        oMail->Subject = "test email from Managed C++ with Hotmail account";
        // Set email body
        oMail->TextBody = "this is a test email sent from Managed C++ project with Hotmail";

        // Hotmail SMTP server address
        SmtpServer ^oServer = gcnew SmtpServer("smtp.live.com");
        // Hotmail user authentication should use your
        // email address as the user name.
        oServer->User = "liveid@hotmail.com";
        oServer->Password = "yourpassword";

        // set 587 port
        oServer->Port = 587;

        // detect SSL/TLS automatically
        oServer->ConnectType = SmtpConnectType::ConnectSSLAuto;

        Console::WriteLine("start to send email with SSL connection...");

        SmtpClient ^oSmtp = gcnew SmtpClient();
        oSmtp->SendMail(oServer, oMail);

        Console::WriteLine("email was sent successfully!");
    }
    catch (Exception ^ep)
    {
        Console::WriteLine("failed to send email with the following error:");
        Console::WriteLine(ep->Message);
    }

    return 0;
}

Hotmail SMTP OAUTH

If your account enabled two-factor authentication, you cannot login your account by normal user authentication, you should use SMTP OAUTH or App Password.

Microsoft Live SMTP servers (Hotmail, Oultook personal account) have been extended to support authorization via the industry-standard OAuth 2.0 protocol. Using OAUTH protocol, user can do authentication by Microsoft Web OAuth instead of inputting user and password directly in application.

Microsoft will disable traditional user authentication in the future, switching to Microsoft OAuth (Modern Authentication) is strongly recommended now.

Or you can generate App Passwords and use this app password instead of your user password.

Send Email using Office 365

First of all, you should go to Office 365 “Outlook” -> “Options” -> “See All Options” -> “Account” -> “My Account” -> “Settings for POP, IMAP, and SMTP access”. You will get your Office 365 SMTP server address and port. Then you can use your Office 365 SMTP server, port, user/password in the codes.

By default, Office 365 SMTP server uses 587 port and explicit SSL (TLS) connection.

Server Port SSL/TLS
smtp.office365.com 25, 587 (recommended) TLS

[C++/CLI - Send Email using Office 365 over Explicit SSL (TLS) on 587 Port - Example]

The following example codes demonstrate how to send email using Office 365 in C++/CLI over TLS 587 port.

Note

To get the full sample projects, please refer to Samples section.

#include "stdafx.h"
using namespace System;
using namespace EASendMail;

int main(array<System::String ^> ^args)
{
    try
    {
        SmtpMail ^oMail = gcnew SmtpMail("TryIt");
        // Your office365 email address
        oMail->From = "yourid@yourdomain";
        // Set recipient email address, please change it to yours
        oMail->To = "support@emailarchitect.net";

        // Set email subject
        oMail->Subject = "test email from Managed C++ with office365 account";
        // Set email body
        oMail->TextBody = "this is a test email sent from Managed C++ project with office365";

        // Office365 SMTP server address
        SmtpServer ^oServer = gcnew SmtpServer("smtp.office365.com");
        // office365 user authentication should use your
        // email address as the user name.
        oServer->User = "yourid@yourdomain";
        oServer->Password = "yourpassword";

        // Use 587 port
        oServer->Port = 587;

        // detect SSL/TLS automatically
        oServer->ConnectType = SmtpConnectType::ConnectSSLAuto;

        Console::WriteLine("start to send email with SSL connection...");

        SmtpClient ^oSmtp = gcnew SmtpClient();
        oSmtp->SendMail(oServer, oMail);

        Console::WriteLine("email was sent successfully!");
    }
    catch (Exception ^ep)
    {
        Console::WriteLine("failed to send email with the following error:");
        Console::WriteLine(ep->Message);
    }

    return 0;
}

Office365 SMTP/EWS/Ms Graph API OAUTH

If your account enabled two-factor authentication, you cannot login your account by normal user authentication, you should use SMTP/EWS/Ms Graph API OAUTH or App Password.

Microsoft Office365 SMTP/EWS/Ms Graph API servers have been extended to support authorization via the industry-standard OAuth 2.0 protocol. Using OAUTH protocol, user can do authentication by Microsoft Web OAuth instead of inputting user and password directly in application.

Microsoft will disable traditional user authentication in the future, switching to Microsoft OAuth (Modern Authentication) is strongly recommended now.

Or you can generate App Passwords and use this app password instead of your user password.

TLS 1.2

TLS is the successor of SSL, more and more SMTP servers require TLS 1.2 encryption now.

If your operating system is Windows XP/Vista/Windows 7/Windows 2003/2008/2008 R2/2012/2012 R2, and you got connection error with SSL/TLS connection, you need to enable TLS 1.2 protocol in your operating system like this:

Enable TLS 1.2 on Windows XP/Vista/7/10/Windows 2008/2008 R2/2012

Next Section

At next section I will introduce how to send email without specified SMTP server.

Appendix

Comments

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