Send Mail with C#

Question

despite all the topics about this on Stackoverflow. I can't manage to find the solution of this problem:

i have this exception :

SMTP server needs a secure connection or the client is not authentificated. Reply from the server is : 5.5.1 Authentication Required. Learn more at

using this code:

    var fromAddress = new MailAddress(user.Email, "From Name");
    var toAddress = new MailAddress("myadress@gmail.com", "To Name");
    const string fromPassword = "fromPassword";
    const string subject = "Subject";
    const string body = "Body";

    var smtp = new SmtpClient
    {
        Host = "smtp.gmail.com",
        Port = 587,
        EnableSsl = true,
        DeliveryMethod = SmtpDeliveryMethod.Network,
        UseDefaultCredentials = false,
        Credentials = new NetworkCredential(fromAddress.Address, fromPassword),
        Timeout = 20000
    };
    using (var message = new MailMessage(fromAddress, toAddress)
    {
        Subject = subject,
        Body = body
    })
    {
        smtp.Send(message);
    }

What am i missing please? thanks for your help

This was asked and answered on SO before - did you search before asking? — Oded, Apr 19 '12 at 13:04
http://stackoverflow.com/questions/704636/sending-email-through-gmail-smtp-server-with-c-sharp — Prix, Apr 19 '12 at 13:05
Check out the following: http://stackoverflow.com/questions/704636/sending-email-through-gmail-smtp-server-with-c-sharp — Tomtom, Apr 19 '12 at 13:06
Check your password and ensure it is a strong one, as far as Google is concerned. — Oded, Apr 19 '12 at 13:06

score 1 · Answer 1 · edited May 23 '17 at 12:03

1

You are not missing anything. I suspect you got your password wrong. You didn't forget to change it from "fromPassword" to what it really should be did you?

This is a cleaner implementation of the same task

edited May 23 '17 at 12:03

Community

1
1

answered Apr 19 '12 at 13:45

BlueVoodoo

3,626
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Shyam sundar shah · Answer 2 · 2013-05-16T06:49:48.367

This code worked for me

  SmtpClient sc = new SmtpClient("smtp.gmail.com");
  NetworkCredential nc = new NetworkCredential("username","password");
  //username doesn't include @gmail.com         
   sc.UseDefaultCredentials = false;
   sc.Credentials = nc;
   sc.EnableSsl = true;
   sc.Port = 587;
     try
      {
       sc.Send(mm);
      } 
     catch (Exception ex)
      {
        EventLog.WriteEntry("Error Sending", EventLogEntryType.Error);
      }

score 1 · Answer 3 · answered May 13 '13 at 09:41

1

Either you have typed your password incorrectly or (more likely) you are trying to use your normal password after you have enabled Google's 2-Step Authentication

You need to generate and use an application specific password

answered May 13 '13 at 09:41

sgmoore

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5
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Send Mail with C#

3 Answers3