Send Email using Gmail in Managed C++/CLI

In previous section, I introduced how to send email over SSL connection. In this section, I will introduce how to use your Gmail account to send email in Managed C++.

Introduction

Gmail SMTP server address is smtp.gmail.com. It requires implicit SSL or explicit SSL (TLS) connection, and you should use your Gmail email address as the user name for ESMTP authentication.

For example: your email is gmailid@gmail.com, and then the user name should be gmailid@gmail.com.

Server Port SSL/TLS
smtp.gmail.com 25, 587 TLS
smtp.gmail.com 465 SSL

Important

If you got authentication error, you need to enable Allowing less secure apps or Sign in using App Passwords.

Another way is Gmail OAUH, please see Gmail SMTP OAUTH section.

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.

[C++/CLI Example - Send email using Gmail account over SSL connection on 465 port]

The following example codes demonstrate how to send email using Gmail 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)
{
    SmtpMail ^oMail = gcnew SmtpMail("TryIt");
    SmtpClient ^oSmtp = gcnew SmtpClient();

    // Your Gmail email address
    oMail->From = "gmailid@gmail.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 Gmail account";

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

    // Gmail SMTP server address
    SmtpServer ^oServer = gcnew SmtpServer("smtp.gmail.com");

    // Use 465 port
    oServer->Port = 465;

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

    // Gmail user authentication
    // For example: your email is "gmailid@gmail.com", then the user should be "gmailid@gmail.com"
    oServer->User = "gmailid@gmail.com";
    oServer->Password = "yourpassword";

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

[Managed C++ Example - Send email using Gmail account over TLS connection on 587 port]

The following example codes demonstrate how to use EASendMail SMTP component to send email using Gmail 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)
{
    SmtpMail ^oMail = gcnew SmtpMail("TryIt");
    SmtpClient ^oSmtp = gcnew SmtpClient();
    // Your Gmail email address
    oMail->From = "gmailid@gmail.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 Gmail account";

    // Set email body
    oMail->TextBody = "this is a test email sent from Managed C++ project with gmail";
    // Gmail SMTP server address
    SmtpServer ^oServer = gcnew SmtpServer("smtp.gmail.com");

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

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

    // Gmail user authentication
    // For example: your email is "gmailid@gmail.com", then the user should be "gmailid@gmail.com"
    oServer->User = "gmailid@gmail.com";
    oServer->Password = "yourpassword";

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

Gmail SMTP OAUTH

The Gmail IMAP and SMTP servers have been extended to support authorization via the industry-standard OAuth 2.0 protocol. Using OAUTH protocol, user can do authentication by Gmail Web OAuth instead of inputting user and password directly in application. This way is more secure, but a little bit complex.

Using Gmail SMTP OAUTH

Next Section

At next section I will introduce how to send email with Yahoo account.

Appendix

Comments

If you have any comments or questions about above example codes, please click here to add your comments.