Send Email with Asynchronous Mode in Managed C++/CLI¶

#include "stdafx.h"

using namespace System;
using namespace EASendMail;

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

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

        // Your SMTP server address
        SmtpServer ^oServer = gcnew SmtpServer("smtp.emailarchitect.net");

        // User and password for ESMTP authentication.
        oServer->User = "test@emailarchitect.net";
        oServer->Password = "testpassword";

        // Most mordern SMTP servers require SSL/TLS connection now.
        // ConnectTryTLS means if server supports SSL/TLS, SSL/TLS will be used automatically.
        oServer->ConnectType = SmtpConnectType::ConnectTryTLS;

        // If your SMTP server uses 587 port
        // oServer->Port = 587;

        // If your SMTP server requires SSL/TLS connection on 25/587/465 port
        // oServer->Port = 25; // 25 or 587 or 465
        // oServer->ConnectType = SmtpConnectType::ConnectSSLAuto;

        Console::WriteLine("start to send email in asynchronous mode...");

        SmtpClient ^oSmtp = gcnew SmtpClient();
        SmtpClientAsyncResult ^oResult = oSmtp->BeginSendMail(
                oServer, oMail, nullptr, nullptr);
        // Wati for the email sending...
        while (!oResult->IsCompleted)
        {
            Console::WriteLine("waiting..., you can do other thing!");
            oResult->AsyncWaitHandle->WaitOne(50, false);
        }
        oSmtp->EndSendMail(oResult);

        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;
}