Gmail Smtp邮件发送失败。

Question

I'm trying to send an email using the Gmail SMTP server, but the message always fails to send. The browser window closes and Express for Web flashes with this error. Any help would be greatly appreciated. Code has been included below

Code Behind

using System.Net.Mail;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class Demos_email_demo : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
    MailMessage myMessage = new MailMessage();
    myMessage.Subject = "Test Message";
    myMessage.Body = "Hello World";
    myMessage.From = new MailAddress("willrathlou3@gmail.com", "Will");
    myMessage.To.Add(new MailAddress("willrathlou3@gmail.com", "Will"));



    SmtpClient mySmtpClient = new SmtpClient("smtp.gmail.com");
    mySmtpClient.Send(myMessage);


}
}

Web.Config

<system.web>
  <compilation debug="true" targetFramework="4.5.2" />
  <httpRuntime targetFramework="4.5.2" />
</system.web>
<system.net>
<mailSettings>
<smtp deliveryMethod="Network" from="Will &lt;willrathlou3@gmail.com&gt;">
<network host ="smtp.gmail.com" enableSsl="true" port="465" />
</smtp>
</mailSettings>
</system.net>
</configuration>

Screenshot Of Error

Answer 1

You need to set NetworkCredential Like this.

client.Credentials=new NetworkCredential("username", "password");

Your code should be like this.

    MailMessage myMessage = new MailMessage();
    myMessage.Subject = "Test Message";
    myMessage.Body = "Hello World";
    myMessage.From = new MailAddress("willrathlou3@gmail.com", "Will");
    myMessage.To.Add(new MailAddress("willrathlou3@gmail.com", "Will"));

    SmtpClient mySmtpClient = new SmtpClient("smtp.gmail.com");
    mySmtpClient .Credentials=new NetworkCredential("username", "password");

    mySmtpClient.Send(myMessage);