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Send Email using Yahoo in C#

In previous section, I introduced how to send email using Gmail account. In this section, I will introduce how to send email using Yahoo account in C#.

Introduction

Yahoo SMTP server address is smtp.mail.yahoo.com. It supports both Normal/Implicit SSL/Explicit SSL (TLS) connection to do user authentication, and you should use your Yahoo email address as the user name for ESMTP authentication.

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

If you want to use implicit SSL connection with Yahoo SMTP server, you must set the port to 465.

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

Note

Remarks: All of samples in this section are based on first section: Send email in a simple C# 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.

Important

If you got authentication error, you need to enable Allowing less secure apps in your Yahoo account. Or you can generate App Passwords and use this app password instead of your user password.

Although Yahoo supports OAUTH, but it doesn’t provide mail permission, so OAUTH is not a solution for Yahoo mail.

[C# - Send Email using Yahoo over Implicit SSL on 465 Port - Example]

The following example codes demonstrate how to send email using Yahoo account in C# over SSL 465 port.

Note

To get the full sample projects, please refer to Samples section.

using System;
using System.Collections.Generic;
using System.Text;
using EASendMail; //add EASendMail namespace
namespace mysendemail
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                SmtpMail oMail = new SmtpMail("TryIt");

                // Your yahoo email address
                oMail.From = "myid@yahoo.com";
                // Set recipient email address
                oMail.To = "support@emailarchitect.net";

                // Set email subject
                oMail.Subject = "test email from yahoo account";
                // Set email body
                oMail.TextBody = "this is a test email sent from c# project with yahoo.";

                // Yahoo SMTP server address
                SmtpServer oServer = new SmtpServer("smtp.mail.yahoo.com");

                // For example: your email is "myid@yahoo.com", then the user should be "myid@yahoo.com"
                oServer.User = "myid@yahoo.com";
                oServer.Password = "yourpassword";

                // Because yahoo deploys SMTP server on 465 port with implicit SSL connection.
                // So we should change the port to 465.
                oServer.Port = 465;

                // detect SSL type automatically
                oServer.ConnectType = SmtpConnectType.ConnectSSLAuto;

                Console.WriteLine("start to send email over SSL ...");

                SmtpClient oSmtp = new SmtpClient();
                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);
            }
        }
    }
}

[C# - Send Email using Yahoo over Explicit SSL (TLS) on 25 or 587 Port - Example]

The following example codes demonstrate how to send email using Yahoo account in C# over TLS 25 port.

Note

To get the full sample projects, please refer to Samples section.

using System;
using System.Collections.Generic;
using System.Text;
using EASendMail; //add EASendMail namespace
namespace mysendemail
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                SmtpMail oMail = new SmtpMail("TryIt");

                // Your yahoo email address
                oMail.From = "myid@yahoo.com";
                // Set recipient email address
                oMail.To = "support@emailarchitect.net";

                // Set email subject
                oMail.Subject = "test email from yahoo account";
                // Set email body
                oMail.TextBody = "this is a test email sent from c# project with yahoo.";

                // Yahoo SMTP server address
                SmtpServer oServer = new SmtpServer("smtp.mail.yahoo.com");

                // For example: your email is "myid@yahoo.com", then the user should be "myid@yahoo.com"
                oServer.User = "myid@yahoo.com";
                oServer.Password = "yourpassword";

                // Set 25 port, if you want to use 587 port, please change 25 to 587
                oServer.Port = 25;

                // detect SSL/TLS type automatically
                oServer.ConnectType = SmtpConnectType.ConnectSSLAuto;

                Console.WriteLine("start to send email over SSL ...");

                SmtpClient oSmtp = new SmtpClient();
                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);
            }
        }
    }
}

TLS 1.2

TLS is the successor of SSL, more and more SMTP servers require TLS 1.2 encryption now.

If your operating system is Windows XP/Vista/Windows 7/Windows 2003/2008/2008 R2/2012/2012 R2, and you got connection error with SSL/TLS connection, you need to enable TLS 1.2 protocol in your operating system like this:

Enable TLS 1.2 on Windows XP/Vista/7/10/Windows 2008/2008 R2/2012

Next Section

At next section I will introduce how to send email using Hotmail/Outlook/Live/Office 365 account in C#.

Appendix

Comments

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

See Also