How to send html email from C#

The System.Net classes provide the functionalities that is similar to Microsoft WinInet API . Here we are using System.Net class for sending an HTML email from the following C# program . In an HTML email , the body part contain HTML codes like HTML pages. In the previous C# program SMTP email from C# describes how to send an email with a text body . Here instead of text body part we are sending email with HTML body part.

The following C# source code shows how to send an email with HTML body part from a Gmail address . The Gmail SMTP server name is and the port using for send mail is 587 . Here using NetworkCredential for password based authentication.

using System;
using System.Windows.Forms;
using System.Net.Mail;

namespace WindowsApplication1
    public partial class Form1 : Form
        public Form1()

        private void button1_Click(object sender, EventArgs e)
                MailMessage mail = new MailMessage();
                SmtpClient SmtpServer = new SmtpClient("");

                mail.From = new MailAddress("");
                mail.Subject = "Test Mail - 1";

                mail.IsBodyHtml = true;
                string htmlBody;

                htmlBody = "Write some HTML code here";

                mail.Body = htmlBody;

                SmtpServer.Port = 587;
                SmtpServer.Credentials = new System.Net.NetworkCredential("username", "password");
                SmtpServer.EnableSsl = true;

                MessageBox.Show("mail Send");
            catch (Exception ex)

You have to provide the necessary information like your gmail username and password etc. (C) 2021    Founded by raps mk
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