Confused with the SmtpClient.UseDefaultCredentials Property

Question

In my MVC4 application, I\'m using the SmtpClient to send out email via Gmail\'s smtp.gmail.com SMTP server.

I\'ve configured my Web.Config

Answer 1

I was getting the same message and it was driving me crazy. After reading this thread I realized that the order mattered on setting my credentials. This worked:

client.UseDefaultCredentials = false;
client.Credentials = new NetworkCredential(smtpSettings.Username, smtpSettings.Password);

While this generated the error you describe:

client.Credentials = new NetworkCredential(smtpSettings.Username, smtpSettings.Password);
client.UseDefaultCredentials = false;

This is just an FYI to anybody else having the same problem.