Solving Timeout Problem When Sending Email via Yandex (C#)

Yandex Mail is a free, secure and reliable email service. It has many great features:

• Advanced security: It has strong protection from spam and services. Checking emails automatically with anti-virus software.
• Send-it-Later Feature: Schedule to send emails at a specific time.
• Theme customization.
• 10 GB disk space.

If you already have a yandex mail account, you can send programmatically emails via yandex mail.

I have created a very simple console application, to show how can I send an email via Yandex SMTP with c#.

SMTP settings:

• hostname: smtp.yandex.com.tr
• port: 465

But with these settings, it gives timeout error. Finally, I figure out a solution after lots of trial and error.

I was able to make my code work by changing the port number from 465 to 587.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace testsendmail
{
    class Program
    {
        static void Main(string[] args)
        {
            var mailUserName = "myusername";
            var mailPassword = "mypassword";
            var mailSentFrom = "myusername";
            var emailListString = "admin@138.68.79.210";

            // Configure the client:
            using (var client = new System.Net.Mail.SmtpClient("smtp.yandex.com.tr")
            {
                DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network
            })
            {
                // client.Port = 465; // Gives timeout error
                client.Port = 587;
                client.UseDefaultCredentials = false;
                client.EnableSsl = true;

                // Create the credentials:
                var credentials = new System.Net.NetworkCredential(mailUserName, mailPassword);

                client.Credentials = credentials;

                // Create the message:
                var mail = new System.Net.Mail.MailMessage(mailSentFrom, emailListString)
                {
                    Subject = "test message subject",
                    Body = "test message body"
                };

                try
                {
                    client.Send(mail);
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex.Message);
                }

                Console.ReadKey();
            }
        }
    }
}

I’m using the SmtpClient dotnet class to create a client object. Create credentials using our own username and password and set to Smtp Client. Lastly, create a MailMessage object and send via Smtp client.

You also have to set UseDefaultCredentials and EnableSsl properties. In our example, we will send an email over SSL/TLS connection in C#.

Note

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