發送Gmail郵件

Question

我想通過和C＃應用程序（控制檯）發送電子郵件。其實我希望它發送一封電子郵件到任何類型的電子郵件，但暫時如果我能把它發送到一個Gmail帳戶，我會很高興。

我只是想暫時把它發送到Gmail賬戶？

整體規劃設計：

namespace EmailAddress 
{ 
    class Program 
    { 
     static void Main(string[] args) 
     { 
      Program test = new Program(); 
      test.email_send(); 
     } 

     public void email_send() 
     { 
      MailMessage mail = new MailMessage(); 
      SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com"); 
      mail.From = new MailAddress("hg@gmail.com"); 
      mail.To.Add("hg@gmail.com"); 
      mail.Subject = "Test Mail - 1"; 
      mail.Body = "Your attachment is accessible on your computer!"; 

      System.Net.Mail.Attachment attachment; 
      attachment = new System.Net.Mail.Attachment("g:/example1.txt"); 
      mail.Attachments.Add(attachment); 

      SmtpServer.Port = 587; 
      SmtpServer.Credentials = new System.Net.NetworkCredential("your mail@gmail.com", "your password"); 
      SmtpServer.EnableSsl = true; 

      SmtpServer.Send(mail); 
     } 
    } 
} 

新代碼：不掛，但不會將消息發送到收件箱

static void Main(string[] args) 
     { 
      Program test = new Program(); 
      //test.email_send(); 
      test.CreateTestMessage4(); 
     } 

     public void email_send() 
     { 
      MailMessage mail = new MailMessage(); 
      SmtpClient smtp = new SmtpClient("smtp.gmail.com"); 
      mail.From = new MailAddress("g@gmail.com"); 
      mail.To.Add("g@gmail.com"); 
      mail.Subject = "Test Mail - 1"; 
      mail.Body = "Your attachment is accessible on your computer!"; 

      System.Net.Mail.Attachment attachment; 

      attachment = new System.Net.Mail.Attachment("g:\\example1.txt"); 
      mail.Attachments.Add(attachment);//list of attachements 

      smtp.Port = 587;//google standard -- most of the time wouldn't not set 
      smtp.EnableSsl = true; 
      smtp.UseDefaultCredentials = true; 
      smtp.DeliveryMethod = SmtpDeliveryMethod.Network; 
      smtp.Credentials = new System.Net.NetworkCredential("*","*"); 

      smtp.Send(mail); 

      Console.WriteLine("-- Sending Email --"); 
      Console.ReadLine(); 
     } 

有人可以試試這個代碼，看看它是否工作。由於某種原因，這是行不通的，所以我想有人對此有新的看法。我只是在這個類的一個實例的主要方法中調用它。

public void email_send() 
     { 
      MailMessage mail = new MailMessage(); 
      SmtpClient smtp = new SmtpClient("smtp.gmail.com"); 
      mail.From = new MailAddress("your email address"); 
      mail.To.Add("your email address"); 
      mail.Subject = "Test Mail - 1"; 
      mail.Body = "Your attachment is accessible on your computer!"; 

      System.Net.Mail.Attachment attachment; 

      attachment = new System.Net.Mail.Attachment("g:\\example1.txt"); 
      mail.Attachments.Add(attachment);//list of attachements 

      //smtp.Port = 587;//google standard -- most of the time wouldn't not set 
      //smtp.EnableSsl = true; 
      //smtp.UseDefaultCredentials = true; 
      //smtp.DeliveryMethod = SmtpDeliveryMethod.Network; 
      //smtp.Credentials = new System.Net.NetworkCredential("your address", 
                   "your password"); 

      smtp.Port = 587; 
      smtp.Host = "smtp.gmail.com"; 
      smtp.UseDefaultCredentials = false; 
      smtp.DeliveryMethod = SmtpDeliveryMethod.Network; 
      smtp.EnableSsl = true; 
      smtp.Credentials = new System.Net.NetworkCredential("*", "*"); smtp.Send(mail); 

      Console.WriteLine("-- Sending Email --"); 
      Console.ReadLine(); 
     } 

Answer 1

你的代碼是接近：

MailMessage mail = new MailMessage(); 
using (SmtpClient smtp = new SmtpClient("smtp.gmail.com")) { 
    mail.From = new MailAddress("haufdoug@gmail.com"); 
    mail.To.Add("haufdoug@gmail.com"); 
    mail.Subject = "Test Mail - 1"; 
    mail.Body = "Your attachment is accessible on your computer!"; 

    System.Net.Mail.Attachment attachment; 

    attachment = new System.Net.Mail.Attachment("g:\\example1.txt"); 
    mail.Attachments.Add(attachment); 

    smtp.Port = 587; 
    smtp.EnableSsl = true; 
    smtp.UseDefaultCredentials = false; 
    smtp.DeliveryMethod = SmtpDeliveryMethod.Network; 
    smtp.Credentials = new System.Net.NetworkCredential("your mail@gmail.com", "your password"); 

    smtp.Send(mail); 
} 

現在，關於你的一些其他問題。

端口587僅供Google使用。通常，您連接的郵件服務器會告訴您使用SMTP郵件的端口; Google表示有587.

對於通過其他服務器發送，您通常不會設置端口號。

側筆記：

1. SmtpClient實現IDisposable接口。所以它應該包含在一個使用條款中，以確保在完成時妥善處理它。除非你正在使用.SendAsync()方法。
2. 由於兩個原因，我將變量名從SmtpServer更改爲smtp。首先，命名約定。一個方法內的變量被推薦爲駱駝案例（for Example）。其次，由於對象是SmtpClient，SmtpServer是一個誤稱。這些是非常不同的事情，錯誤的事情是不好的做法。

Answer 2

你可以試試這個，它的工作對我來說：

SmtpClient SmtpServer = new SmtpClient(); 
SmtpServer.Port = 587; 
SmtpServer.Host = smtp.gmail.com; 
SmtpServer.UseDefaultCredentials = false; 
SmtpServer.DeliveryMethod = SmtpDeliveryMethod.Network; 
SmtpServer.EnableSsl = true; 
SmtpServer.Credentials = new System.Net.NetworkCredential("your mail@gmail.com", "your password");