SMTP异常。要求认证？

Question

protected void Button1_Click(object sender, EventArgs e) 
{ 
    MailMessage message = new MailMessage() 
    { 
     Subject = "Subject", 
     Body = "Body" 
    }; 
    message.To.Add(new MailAddress("demo@example.com", "Some name")); 

    SmtpClient client = new SmtpClient(); 
    client.EnableSsl = true; 
    client.Send(message); 
} 

配置

<configuration> 
    <system.net> 
    <mailSettings> 
     <smtp from="demo@example.com"> 
     <network host="****" defaultCredentials="false" port="587" userName="****" password="****" /> 
     </smtp> 
    </mailSettings> 
    </system.net> 
<system.web> 

校正。它现在有效。谢谢Marek

Answer 1

您的问题可能与defaultCredentials设置为true。尝试将其设置为false并重试。另外，你为什么再次在代码中设置你的凭证？ Gmail还需要通过SSL（如果我没记错的话）邮件发送到端口587.

就在今天，我在我的代码中实现了gmail smtp。我的设置和代码：

<system.net> 
    <mailSettings> 
     <smtp deliveryMethod="Network" from="MY_GMAIL_EMAIL"> 
     <network defaultCredentials="false" host="smtp.gmail.com" port="587" userName="MY_GMAIL_USERNAME" password="MY_GMAIL_PASSWORD" /> 
     </smtp> 
    </mailSettings> 
    </system.net> 


MailMessage message = new MailMessage() { 
           Subject = "Subject", 
           Body = "Body" 
          }; 
message.To.Add(new MailAddress("someemail@domain.com", "Some name")); 
SmtpClient smtpClient = new SmtpClient(); 
smtpClient.EnableSsl = true; 
smtpClient.Send(message);