SmtpServer.Port Property


Gets or sets the port of SMTP server.

[Visual Basic]
Public Property Port As Integer
[C#]
public int Port {get; set;}
[C++]
public: __property int get_Port();
public: __property void set_Port(int);
[JScript]
public function get Port() : int;
public function set Port(int);

Property Value

A integer value indicating the SMTP server port. Default value is 25. However, some ISP block outbound 25 port to prevent user to send email directly to other SMTP server. Therefore, many email providers also provide an alternative port 587 to receive email from such users. 465 port is the common port used to receive email over direct SSL connection. If your server uses 465 port, you must set ConnectType to ConnectSSLAuto or ConnectDirectSSL.

Example

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

[VB - Send Email using SMTP Server]

Imports EASendMail

Sub SendMail()

    Try
        Dim oServer As SmtpServer = New SmtpServer("smtp.adminsystem.com")
        ' set user authentication
        oServer.User = "myuser@adminsystem.com"
        oServer.Password = "mypassword"
        
        ' specifies the authentication mechanism, AuthAuto is default value
        ' oSmtp.AuthType = SmtpAuthType.AuthAuto

        ' 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
        
        ' set SSL/TLS connection
        ' oServer.ConnectType = SmtpConnectType.ConnectSSLAuto
        
        ' set SMTP server port to 587, default value is 25
        ' oServer.Port = 587

        ' set SMTP server port to 465, 
        ' if 465 port is used, ConnectType should use ConnectSSLAuto or ConnectDirectSSL.
        ' oServer.Port = 465
        
        ' set helo domain, default value is current machine name
        ' oServer.HeloDomain = "mymachine.com"
        
        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 email sent from VB"
        oMail.TextBody = "test body"
                        
        Dim oSmtp As SmtpClient = New SmtpClient()
        oSmtp.SendMail(oServer, oMail)
        Console.WriteLine("This email has been submitted to server successfully!")

    Catch exp As Exception
        Console.WriteLine("Exception: {0}", exp.Message)
    End Try

End Sub


[C# - Send Email using SMTP Server] using System; using EASendMail; void SendMail() { try { // SMTP server address SmtpServer oServer = new SmtpServer("smtp.adminsystem.com"); // SMTP user authentication oServer.User = "myusername"; oServer.Password = "mypassword"; // specifies the authentication mechanism, AuthAuto is default value // oSmtp.AuthType = SmtpAuthType.AuthAuto; // 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; // set SSL/TLS connection // oServer.ConnectType = SmtpConnectType.ConnectSSLAuto; // set SMTP server port to 587, default value is 25 // oServer.Port = 587; // set SMTP server port to 465, // if 465 port is used, ConnectType should use ConnectSSLAuto or ConnectDirectSSL. // oServer.Port = 465; // set helo domain, default value is current machine name // oServer.HeloDomain = "mymachine.com"; SmtpMail oMail = new SmtpMail("TryIt"); oMail.From = new MailAddress("from@adminsystem.com"); oMail.To.Add(new MailAddress("to@adminsystem.com")); oMail.Subject = "test email sent from C#"; oMail.TextBody = "test body"; SmtpClient oSmtp = new SmtpClient(); oSmtp.SendMail(oServer, oMail); Console.WriteLine("This email has been submitted to server successfully!"); } catch(Exception exp) { Console.WriteLine("Exception: {0}", exp.Message); } }
[C++/CLI - Send Email using SMTP Server] using namespace System; using namespace EASendMail; void SendMail() { try { // SMTP server address SmtpServer ^oServer = gcnew SmtpServer("smtp.adminsystem.com"); // SMTP user authentication oServer->User = "myusername"; oServer->Password = "mypassword"; // specifies the authentication mechanism, AuthAuto is default value // oSmtp.AuthType = SmtpAuthType::AuthAuto; // 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; // set SSL/TLS connection // oServer->ConnectType = SmtpConnectType::ConnectSSLAuto; // set SMTP server port to 587, default value is 25 // oServer->Port = 587; // set SMTP server port to 465, // if 465 port is used, ConnectType should use ConnectSSLAuto or ConnectDirectSSL. // oServer->Port = 465; // set helo domain, default value is current machine name // oServer->HeloDomain = "mymachine.com"; SmtpMail ^oMail = gcnew SmtpMail("TryIt"); oMail->From = gcnew MailAddress("from@adminsystem.com"); oMail->To->Add(gcnew MailAddress("to@adminsystem.com")); oMail->Subject = "test email sent from C++/CLI"; oMail->TextBody = "test body"; SmtpClient ^oSmtp = gcnew SmtpClient(); oSmtp->SendMail(oServer, oMail); Console::WriteLine("This email has been submitted to server successfully!"); } catch(Exception ^exp) { Console::WriteLine("Exception: {0}", exp->Message); } }

See Also

User Authentication and SSL Connection
From, ReplyTo, Sender and Return-Path
Process Bounced Email (Non-Delivery Report) and Email Tracking

Online Tutorial

Send Email over SSL/TLS in C#
Send Email using Gmail in C#
Send Email using Yahoo in C#
Send Email using Hotmail/Live in C#

Send Email over SSL/TLS in VB
Send Email using Gmail in VB
Send Email using Yahoo in VB
Send Email using Hotmail/Live in VB

Send Email over SSL/TLS in C++/CLI
Send Email using Gmail in C++/CLI
Send Email using Yahoo in C++/CLI
Send Email using Hotmail/Live in C++/CLI