Sending email from c# code [duplicate]

Question

I am trying to send an e-mail from my C# code.Here is an example

MailMessage message = new MailMessage();
            message.To.Add("[email protected]");
            message.Subject = "Registration";
            message.From = new System.Net.Mail.MailAddress("[email protected]");
            message.Body = "OK";
            SmtpClient smtp = new SmtpClient();
            smtp.Host = "smtp.gmail.com";
            smtp.Send(message);

But my code breaks and here is the error:

The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.0 Must issue a STARTTLS command first. hn4sm3874638bkc.2 - gsmtp

You need authentication using the NetworkCredential object. — computer10171
– computer10171, Commented Jun 25, 2013 at 20:04

Kamil · Accepted Answer · 2013-06-25 20:03:55Z

2

You have to turn on encryption.

Put this line somewhere before smtp.Send()

smtpClient.EnableSsl = true;

answered Jun 25, 2013 at 20:03

Kamil

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