Sending email via C# [duplicate]

Question

I am trying to send an email from my project, but I'm having some trouble...

I'm using this code:

private void SendMail()
{
    MailMessage mail = new MailMessage(MailSender, MailReciever, MailSubject, MailContent);
    SmtpClient client = new SmtpClient(SMTPServer);

    client.Send(mail);
}

Then I get an exception :

The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.1 Client was not authenticated

I don't know what to do. Any suggestions ? What am I doing wrong ?

Instead of stating I don't know what to do perhaps you could have looked at the Related section on this page as well as do a Stackoverflow search for the topic since there are tons of answers as well as working examples.. lack of effort I must say Etrit — MethodMan
– MethodMan, Commented Aug 5, 2013 at 12:22

Massimiliano Peluso · Accepted Answer · 2013-08-05 12:18:20Z

5

You need to pass the network credential to authenticate the request

client.Credentials = new System.Net.NetworkCredential("yourusername", "yourpassword");

answered Aug 5, 2013 at 12:18

Massimiliano Peluso

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5 Comments

PW Kad Over a year ago

Extremely over answered topic...

Brad Christie Over a year ago

May also need to EnableSsl (depending on the smtp server).

Pranav Over a year ago

That does not make it available for Downvote ...

Pranav Over a year ago

@Etrit:- Please accept this as an answer then ...

Etrit Over a year ago

Done. Just needed to wait the countdown to accept an answer :)

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