SmtpClient Constructor

Initializes a new instance of the SmtpClient class.

[Visual Basic]
Public Sub New()

[C#]
public SmtpClient();

[C++]
public: SmtpClient();

[JScript]
public function SmtpClient();

Example

[Visual Basic, C#, C++, JScript.NET] The following example demonstrates how to send email with EASendMail SMTP Component, but it doesn't demonstrates the events usage. To get the full samples of EASendMail, please refer to Samples section.

[VB - Send Email Example]

Imports EASendMail

Public Sub SendMail(sender As String,
    toRecipients As String,
    ccRecipients As String,
    subject As String,
    bodyText As String,
    server As String,
    user As String,
    password As String,
    useSsl As Boolean)

    Try
        ' From is a MailAddress object, it also supports implicit converting from string directly. 
        ' The syntax is like this: "test@adminsystem.com" or "Tester <test@adminsystem.com>"

        ' oMail.From = New MailAddress("Tester", "test@adminsystem.com") 
        ' oMail.From = New MailAddress("Tester <test@adminsystem.com>") 
        ' oMail.From = New MailAddress("test@adminsystem.com") 

        ' To, Cc and Bcc is a AddressCollection object, it also supports implicit converting from string directly. 
        ' multiple addresses should be separated with (,;) 
        ' The syntax is like this: "test@adminsystem.com, test1@adminsystem.com" 

        ' oMail.To = New AddressCollection("test1@adminsystem.com, test2@adminsystem.com") 
        ' oMail.To = New AddressCollection("Tester1 <test@adminsystem.com>, Tester2 <test2@adminsystem.com>")

        ' You can add more recipient by Add method 
        ' oMail.To.Add(New MailAddress("tester", "test@adminsystem.com"))

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

        oMail.From = New MailAddress(sender)
        oMail.To = New AddressCollection(toRecipients)
        oMail.Cc = New AddressCollection(ccRecipients)

        oMail.Subject = subject
        ' If bodyText contains html tags, please use 
        ' oMail.HtmlBody = bodyText 
        oMail.TextBody = bodyText

        ' Add attachment 
        ' oMail.AddAttachment("c:\test.gif")

        ' Set server address
        Dim oServer As SmtpServer = New SmtpServer(server)
        If user.Length > 0 And password.Length > 0 Then
            ' Set user/password for ESMTP authentication
            oServer.User = user
            oServer.Password = password
        End If

        ' Most mordern SMTP servers require SSL/TLS connection now.
        ' ConnectTryTLS means if server supports SSL/TLS, SSL/TLS will be used automatically.
        oServer.ConnectType = If(useSsl, SmtpConnectType.ConnectSSLAuto, SmtpConnectType.ConnectTryTLS)

        Dim oSmtp As SmtpClient = New SmtpClient()

        ' To generate a log file for SMTP transaction, please use 
        ' oSmtp.LogFileName = "c:\smtp.txt"

        oSmtp.SendMail(oServer, oMail)

        Console.WriteLine("The message has been submitted to server successfully!")
    Catch ex As Exception
        Console.WriteLine("Exception: {0}", ex.Message)
    End Try

End Sub


[C# - Send Email Example]

using System;
using System.Collections;
using EASendMail;

public static void SendMail(string sender,
        string toRecipients,
        string ccRecipients,
        string subject,
        string bodyText,
        string server,
        string user,
        string password,
        bool useSsl)
{
    try
    {
        // From is a MailAddress object, it also supports implicit converting from string. 
        // The syntax is like this: "test@adminsystem.com" or "Tester <test@adminsystem.com>"

        // oMail.From = new MailAddress("Tester", "test@adminsystem.com"); 
        // oMail.From = new MailAddress("Tester <test@adminsystem.com>");
        // oMail.From = new MailAddress("test@adminsystem.com"); 

        // To, Cc and Bcc is a AddressCollection object, it also supports implicit converting from string.
        // multiple addresses should be separated with (,;) 
        // The syntax is like this: "test@adminsystem.com, test1@adminsystem.com" 

        // oMail.To = new AddressCollection("test1@adminsystem.com, test2@adminsystem.com"); 
        // oMail.To = new AddressCollection("Tester1<test@adminsystem.com>, Tester2<test2@adminsystem.com>");
        
        // You can add more recipient by Add method 
        // oMail.To.Add( new MailAddress( "tester", "test@adminsystem.com"));

        SmtpMail oMail = new SmtpMail("TryIt");
        oMail.From = sender;

        oMail.To = toRecipients;
        oMail.Cc = ccRecipients;

        oMail.Subject = subject;
        // If bodyText contains the html tags, please use
        // oMail.HtmlBody = bodyText; 
        oMail.TextBody = bodyText;
        
        // Add attachment 
        // oMail.AddAttachment("c:\\test.gif");

        // Set server address
        SmtpServer oServer = new SmtpServer(server);
        if (user.Length != 0 && password.Length != 0)
        {
            // Set user/password for ESMTP authentication
            oServer.User = user;
            oServer.Password = password;
        }

        // Most mordern SMTP servers require SSL/TLS connection now.
        // ConnectTryTLS means if server supports SSL/TLS, SSL/TLS will be used automatically.
        oServer.ConnectType = (useSsl) ? SmtpConnectType.ConnectSSLAuto : SmtpConnectType.ConnectTryTLS;

        SmtpClient oSmtp = new SmtpClient();
        
        // To generate a log file for SMTP transaction, please use 
        // oSmtp.LogFileName = "c:\\smtp.txt";

        oSmtp.SendMail(oServer, oMail);

        Console.WriteLine("The message has been submitted to server successfully!");
    }
    catch (Exception exp)
    {
        Console.WriteLine("Exception: {0}", exp.Message);
    }
}


[C++/CLI - Send Email Example]

using namespace System;
using namespace System::Collections;
using namespace EASendMail; 

static void SendMail(String ^sender,
    String ^toRecipients,
    String ^ccRecipients,
    String ^subject,
    String ^bodyText,
    String ^server,
    String ^user,
    String ^password,
    bool useSsl)
{
    try
    {
        // From is a MailAddress object, it also supports implicit converting from string. 
        // The syntax is like this: "test@adminsystem.com" or "Tester <test@adminsystem.com>"

        // oMail->From = gcnew MailAddress("Tester", "test@adminsystem.com"); 
        // oMail->From = gcnew MailAddress("Tester <test@adminsystem.com>"); 
        // oMail->From = gcnew MailAddress("test@adminsystem.com"); 
        
        //To, Cc and Bcc is a AddressCollection object, it also supports implicit converting from string.
        // multiple address should be separated with (,;) 
        //The syntax is like this: "test@adminsystem.com, test1@adminsystem.com" 

        // oMail->To  = gcnew AddressCollection("test1@adminsystem.com, test2@adminsystem.com"); 
        // oMail->To = gcnew AddressCollection("Tester1 <test@adminsystem.com>, Tester2 <test2@adminsystem.com>");
        
        // You can add more recipient by Add method 
        // oMail->To->Add(gcnew MailAddress("tester", "test@adminsystem.com")); 
        
        SmtpMail ^oMail = gcnew SmtpMail("TryIt");

        oMail->From = gcnew EASendMail::MailAddress(sender);
        oMail->To = gcnew EASendMail::AddressCollection(toRecipients);
        oMail->Cc = gcnew EASendMail::AddressCollection(ccRecipients);

        oMail->Subject = subject;

        // If bodyText contains html tags, please use 
        // oMail->HtmlBody = bodyText; 
        oMail->TextBody = bodyText;

        // Add attachment 
        // oMail->AddAttachment("c:\\test.gif");      

        // Set server address
        SmtpServer ^oServer = gcnew SmtpServer(server);
        if (user->Length != 0 && password->Length != 0)
        {
            // Set user/password for ESMTP authentication
            oServer->User = user;
            oServer->Password = password;
        }

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

        SmtpClient ^oSmtp = gcnew SmtpClient();

        // To generate a log file for SMTP transaction, please use 
        // oSmtp->LogFileName = "c:\\smtp.txt";

        oSmtp->SendMail(oServer, oMail);
        
        Console::WriteLine("The message has been submitted to server successfully!");
    }
    catch (Exception ^exp)
    {
        Console::WriteLine("Exception: {0}", exp->Message);
    }
}


[JScript.NET - Send Email Example]

public function SendMail(sender:String, 
    toRecipients:String, 
    ccRecipients:String, 
    subject:String,
    bodyText:String,
    server:String,
    user:String,
    password:String,
    useSsl:Boolean)
{
    try
    {   
        // From is a MailAddress object, it also supports implicit converting from string. 
        // The syntax is like this: "test@adminsystem.com" or "Tester <test@adminsystem.com>"

        // oMail.From = new MailAddress("Tester", "test@adminsystem.com"); 
        // oMail.From = new MailAddress("Tester<test@adminsystem.com>"); 
        // oMail.From = new MailAddress("test@adminsystem.com"); 

        // To, Cc and Bcc is a AddressCollection object, it also supports implicit converting from string.
        // multiple addresses should be separated with (,;) 
        // The syntax is like this: "test@adminsystem.com, test1@adminsystem.com" 

        // oMail.To = new AddressCollection("test1@adminsystem.com, test2@adminsystem.com");
        // oMail.To = new AddressCollection("Tester1 <test@adminsystem.com>, Tester2 <test2@adminsystem.com>");

        // You can add more recipient by Add method 
        // oMail.To.Add(new MailAddress("tester","test@adminsystem.com"));
            
        var oMail:SmtpMail =  new SmtpMail("TryIt");

        oMail.From  = new MailAddress(sender);
        oMail.To = new AddressCollection(toRecipients);
        oMail.Cc = new AddressCollection(ccRecipients);
            
        oMail.Subject = subject;

        // If bodyText contains html tags, please use 
        // oMail.HtmlBody = bodyText; 
        oMail.TextBody = bodyText;
        
        // Add attachment 
        // oMail.AddAttachment("c:\\test.gif");               
        
        // Set server address
        var oServer:SmtpServer = new SmtpServer(server);
        if(user.Length != 0 && password.Length != 0)
        {
            // Set user/password for ESMTP authentication
            oServer.User = user;
            oServer.Password = password;
        }
        
        // Most mordern SMTP servers require SSL/TLS connection now.
        // ConnectTryTLS means if server supports SSL/TLS, SSL/TLS will be used automatically.
        oServer.ConnectType = (useSsl)? SmtpConnectType.ConnectSSLAuto : SmtpConnectType.ConnectTryTLS;

        var oSmtp:SmtpClient = new SmtpClient();

        // To generate a log file for SMTP transaction, please use 
        // oSmtp.LogFileName = "c:\\smtp.txt";

        oSmtp.SendMail(oServer, oMail);

        Console.WriteLine("The message has been submitted to server successfully!");
    }
    catch(exp:System.Exception)
    {
        Console.WriteLine("Exception: {0}", exp.Message);           
    }   
}

See Also

Using EASendMail SMTP .NET Component
User Authentication and SSL Connection
From, ReplyTo, Sender and Return-Path
Digital Signature and E-mail Encryption
DomainKeys and DKIM Signature
Send E-mail Directly (Simulating SMTP server)
Work with EASendMail Service (Email Queuing)
Bulk Email Sender Guidelines
Process Bounced Email (Non-Delivery Report) and Email Tracking
EASendMail .NET Namespace References
EASendMail SMTP Component Samples

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