SmtpClient.BeginSendMail Method

Sends email message asynchronously.

[Visual Basic]
Public Function BeginSendMail( _
    server As SmtpServer, _
    mail As SmtpMail, _
    callback As AsyncCallback, _
    state As Object _
) As SmtpClientAsyncResult

[C#]
public SmtpClientAsyncResult BeginSendMail(
    SmtpServer server,
    SmtpMail mail,
    AsyncCallback callback,
    Object state
);

[C++]
public: SmtpClientAsyncResult^ BeginSendMail(
    SmtpServer^ server,
    SmtpMail^ mail,
    AsyncCallback^ callback,
    Object^ state
);

[JScript]
public function BeginSendMail( 
    server : SmtpServer, 
    mail : SmtpMail, 
    callback : AsyncCallback, 
    state As Object 
) : SmtpClientAsyncResult;

Parameters

server: A SmtpServer instances used to send email.
mail: A SmtpMail instance to send.
callback: The AsyncCallback delegate.
state: An object containing state information for this request.

Return Value

An SmtpClientAsyncResult that references the asynchronous send.

Example

[Visual Basic, C#, C++] To get the full samples of EASendMail, please refer to Samples section.

[VB - Send Email Asynchronously]

Imports EASendMail

Sub SendMail()

    Try
        Dim oMail As SmtpMail = New SmtpMail("TryIt")

        oMail.From = New MailAddress("from@adminsystem.com")
        oMail.To.Add(New MailAddress("to@adminsystem.com"))

        oMail.Subject = "test subject"
        oMail.TextBody = "test body"

        Dim oServer As SmtpServer = New SmtpServer("myserveraddress")
        ' SMTP user authentication
        oServer.User = "myusername"
        oServer.Password = "mypassword"

        ' 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

        Dim oSmtp As SmtpClient = New SmtpClient()
        Dim asyncResult As SmtpClientAsyncResult = oSmtp.BeginSendMail(oServer, oMail, Nothing, Nothing)
        Do While Not asyncResult.AsyncWaitHandle.WaitOne(5, False)
            ' do something
        Loop

        oSmtp.EndSendMail(asyncResult)
        Console.WriteLine("This message has been submitted to server successfully!")
    Catch exp As Exception
        Console.WriteLine("Exception: {0}", exp.Message)
    End Try

End Sub


[C# - Send Email Asynchronously]

using System;
using EASendMail;

void SendMail()
{
    try
    {
        SmtpMail oMail = new SmtpMail("TryIt");
        oMail.From = new MailAddress("from@adminsystem.com");
        oMail.To.Add(new MailAddress("to@adminsystem.com"));

        oMail.Subject = "test subject";
        oMail.TextBody = "test body";

        SmtpServer oServer = new SmtpServer("myserveraddress");
        // SMTP user authentication
        oServer.User = "myusername";
        oServer.Password = "mypassword";

        // 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;

        SmtpClient oSmtp = new SmtpClient();
        SmtpClientAsyncResult asyncResult = oSmtp.BeginSendMail(oServer, oMail, null, null);
        while (!asyncResult.AsyncWaitHandle.WaitOne(5, false))
        {
            // do something
        }

        oSmtp.EndSendMail(asyncResult);
        Console.WriteLine("the message was sent to {0} successfully",
            asyncResult.SmtpClientInstance.CurrentSmtpServer.Server);
    }
    catch (Exception exp)
    {
        Console.WriteLine("Exception: {0}", exp.Message);
    }
}


[C++/CLI - Send Email Asynchronously]

using namespace System;
using namespace EASendMail;

void SendMail()
{
    try
    {
        SmtpMail ^oMail = gcnew SmtpMail("TryIt");
        oMail->From = gcnew MailAddress("from@adminsystem.com");
        oMail->To->Add(gcnew MailAddress("to@adminsystem.com"));

        oMail->Subject = "test subject";
        oMail->TextBody = "test body";

        SmtpServer ^oServer = gcnew SmtpServer("myserveraddres");
        // SMTP user authentication
        oServer->User = "myusername";
        oServer->Password = "mypassword";

        // 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;

        SmtpClient ^oSmtp = gcnew SmtpClient();
        SmtpClientAsyncResult^ asyncResult = oSmtp->BeginSendMail(oServer, oMail, nullptr, nullptr);
        while (!asyncResult->AsyncWaitHandle->WaitOne(5, false))
        {
            // do other thing;
        }

        oSmtp->EndSendMail(asyncResult);
        Console::WriteLine("the message was sent to {0} successfully",
            asyncResult->SmtpClientInstance->CurrentSmtpServer->Server);
    }
    catch (Exception ^exp)
    {
        Console::WriteLine("Exception: {0}", exp->Message);
    }
}

Online Tutorials

Send Email in VB 6.0 - Tutorial
Send Email in C# - Tutorial
Send Email in VB.NET - Tutorial
Send Email in Visual C++ - Tutorial
Send Email in Managed C++/CLI - Tutorial
Send Email in Delphi - Tutorial
Send Email in MS SQL stored procedure - Tutorial