发送Gmail邮件

Question

我想通过和C＃应用程序（控制台）发送电子邮件。其实我希望它发送一封电子邮件到任何类型的电子邮件，但暂时如果我能把它发送到一个Gmail帐户，我会很高兴。

我只是想暂时把它发送到Gmail账户？

整体规划设计：

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); 
     } 
    } 
} 

新代码：不挂，但不会将消息发送到收件箱

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(); 
     } 

有人可以试试这个代码，看看它是否工作。由于某种原因，这是行不通的，所以我想有人对此有新的看法。我只是在这个类的一个实例的主要方法中调用它。

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

你的代码是接近：

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); 
} 

现在，关于你的一些其他问题。

端口587仅供Google使用。通常，您连接的邮件服务器会告诉您使用SMTP邮件的端口; Google表示有587.

对于通过其他服务器发送，您通常不会设置端口号。

侧笔记：

1. SmtpClient实现IDisposable接口。所以它应该包含在一个使用条款中，以确保在完成时妥善处理它。除非你正在使用.SendAsync()方法。
2. 由于两个原因，我将变量名从SmtpServer更改为smtp。首先，命名约定。一个方法内的变量被推荐为骆驼案例（for Example）。其次，由于对象是SmtpClient，SmtpServer是一个误称。这些是非常不同的事情，错误的事情是不好的做法。

Answer 2

你可以试试这个，它的工作对我来说：

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");