Sending Email with template using Gmail Credentials

Question

Hi i am trying to send an email using gmail credentials and calling an email template but it is throwing an exception that Failure sending mail

SmtpClient SmtpServer = new SmtpClient();
SmtpServer.Credentials = new System.Net.NetworkCredential("ambarishkesavarapu@gmail.com", "xxxxxx");
SmtpServer.Port = 587;
SmtpServer.Host = "smtp.gmail.com";
SmtpServer.EnableSsl = true;
message = new MailMessage();
message.Subject = "Visitor Arrived";
message.SubjectEncoding = System.Text.Encoding.UTF8;
message.IsBodyHtml = false;
message.Body = "EmailTemplate.html";
message.BodyEncoding = System.Text.Encoding.UTF8;
message.From = new MailAddress("ambarishkesavarapu@gmail.com");
message.To.Add(lblCPEmail.Text);
message.Priority = MailPriority.High;
message.DeliveryNotificationOptions = DeliveryNotificationOptions.OnFailure;
SmtpServer.Send(message);

Please help me out.

score 0 · Answer 1 · edited May 23 '17 at 12:00

You have to use StreamReader to read from html file....and also set the MailMessage.BodyFormat property to MailFormat.Html
Use This:

SmtpClient SmtpServer = new SmtpClient();
SmtpServer.Credentials = new System.Net.NetworkCredential("ambarishkesavarapu@gmail.com", "xxxxxx");
SmtpServer.Port = 587;
SmtpServer.Host = "smtp.gmail.com";
SmtpServer.EnableSsl = true;

using (StreamReader reader = File.OpenText(htmlFilePath)) // Path to your 
{                                                         // HTML file
    message = new MailMessage();
    message.Subject = "Visitor Arrived";
    message.SubjectEncoding = System.Text.Encoding.UTF8;
    message.IsBodyHtml = false;
    message.BodyEncoding = System.Text.Encoding.UTF8;
    message.From = new MailAddress("ambarishkesavarapu@gmail.com");
    message.To.Add(lblCPEmail.Text);
    message.Priority = MailPriority.High;

    message.Body = reader.ReadToEnd();  // Load the content from your file...
    //...
}
SmtpServer.Send(message);

Answer partially taken from Send a email with a HTML file as body (C#)

Dieu Phan Dinh · Answer 2 · 2016-11-04T01:54:23.897

            foreach (GnrDataMailInfo dmi in lstDMI)
            {
                MailMessage mail = new MailMessage();
                mail.From = "youremail";

                SmtpClient smtp = new SmtpClient();
                smtp.Port = 25;   // [1]  port
                smtp.EnableSsl = true;
                smtp.DeliveryMethod = SmtpDeliveryMethod.Network; // [2] Added this
                smtp.UseDefaultCredentials = false; // [3] Changed this
                smtp.Credentials = new NetworkCredential(mail.From.ToString(), "password");  // [4] Added this.
                smtp.EnableSsl = false;
                smtp.Timeout = 20000;
                smtp.Host = "yourhost";

                mail.DeliveryNotificationOptions = DeliveryNotificationOptions.OnFailure;
                mail.BodyEncoding = System.Text.Encoding.UTF8;
                mail.HeadersEncoding = System.Text.Encoding.UTF8;
                mail.Subject = dmi.Subject;
                mail.To.Add(dmi.To);
                mail.IsBodyHtml = true;
                mail.Body = dmi.Body;

                smtp.Send(mail);
            }

Welcome to SO. It helps to explain why your answer is correct, instead of just posting the code. — Karl Gjertsen, Nov 03 '16 at 07:52

score 0 · Answer 3 · answered Nov 03 '16 at 08:00

use port 465 instead

Port 465 is for smtps SSL encryption is started automatically before any SMTP level communication.

Port 587 is for msa It is almost like standard SMTP port. MSA should accept email after authentication (e.g. after SMTP AUTH). It helps to stop outgoing spam when netmasters of DUL ranges can block outgoing connections to SMTP port (port 25).

Sending Email with template using Gmail Credentials

3 Answers3