Question

I am using the following very simple code and I keep getting System.Net.Mail.SmtpException failure sending mail. This is my code:

static void main(string[] args)
{
    MailAddress from = new MailAddress("[e-mail]", "Mr. Test");
    MailAddress to = new MailAddress("[e-mail]", "mr. man");
    MailMessage msg = new MailMessage(from, to);
    msg.Subject = "email";
    msg.Body = "This is email.";
    SmtpClient client = new SmtpClient("smtp.gmail.com");

    client.Send(msg);
}

I have never tried programmatically sending email before so I appreciate the help.

Answer 1

You’re missing credentials and sending as TLS (secured connection):

Credentials = new NetworkCredential("[e-mail]", "mypwd"), 
EnableSsl = true 

More Details here:
Sending email through Gmail SMTP server with C#