我想通过 ASP.NET 发送邮件但发生错误

Question

I am using C# for the back end of this contact form and html is the front end

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

   public partial class index : System.Web.UI.Page
   {
         protected void Send_Click(object sender, EventArgs e)
         {
              try
              {
                   MailMessage message = new MailMessage(From.Text, To.Text, Subject.Text, Body.Text);
                   message.IsBodyHtml = true;
                   SmtpClient client = new SmtpClient("smtp.gmail.com", 465);
                   client.EnableSsl = true;
                   // The credentials when I ran the code were correct.
                   client.Credentials = new System.Net.NetworkCredential("example@gmail.com","password");

                   client.Send(message);

                   status.Text = "Mail was sent successfully";
                   status.Text = "Send was clicked";
              }
              // This catch block is so that you can see what error 
              // occurs if there is an error
              catch(Exception ex)
              {
                 status.Text = ex.StackTrace;
              }
       }
 }

This is the error that was shown

System.Net.Mail.MailCommand.CheckResponse(SmtpStatusCode statusCode, String response)

at System.Net.Mail.MailCommand.Send(SmtpConnection conn, Byte[] command, MailAddress from, Boolean allowUnicode)
at System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, Boolean allowUnicode, SmtpFailedRecipientException& exception)
at System.Net.Mail.SmtpClient.Send(MailMessage message) at index.Send_Click(Object sender, EventArgs e) in C:\\Users\\robert.crider\\source\\repos\\WebSite2\\WebSite2\\index.aspx.cs:line 37

Answer 1

be sure you use the right port for google smtp and delivery network. and You already enable IMAP and/or POP3 access in the Gmail account settings.

SmtpClient client= new SmtpClient
        {
           Host = "smtp.gmail.com",
           Port = 587,
           EnableSsl = true,
           DeliveryMethod = SmtpDeliveryMethod.Network,
           Credentials    = new NetworkCredential(yourgoogleemail, yourgooglepassword),
           Timeout = 3000
        };