通过Gmail在.NET中发送电子邮件

Question

我没有依赖我的主机发送电子邮件,而是考虑使用我的Gmail帐户发送电子邮件.这些电子邮件是我在节目中播放的乐队的个性化电子邮件.有可能吗？

Answer 1

一定要使用System.Net.Mail,而不是弃用System.Web.Mail.使用SSL System.Web.Mail是一个混乱的hacky扩展.

using System.Net;
using System.Net.Mail;

var fromAddress = new MailAddress("from@gmail.com", "From Name");
var toAddress = new MailAddress("to@example.com", "To Name");
const string fromPassword = "fromPassword";
const string subject = "Subject";
const string body = "Body";

var smtp = new SmtpClient
{
    Host = "smtp.gmail.com",
    Port = 587,
    EnableSsl = true,
    DeliveryMethod = SmtpDeliveryMethod.Network,
    UseDefaultCredentials = false,
    Credentials = new NetworkCredential(fromAddress.Address, fromPassword)
};
using (var message = new MailMessage(fromAddress, toAddress)
{
    Subject = subject,
    Body = body
})
{
    smtp.Send(message);
}

Answer 2

以上答案不起作用.您必须设置DeliveryMethod = SmtpDeliveryMethod.Network或它将返回" 客户端未经过身份验证 "错误.暂停时间总是一个好主意.

修改后的代码:

using System.Net.Mail;
using System.Net;

var fromAddress = new MailAddress("from@gmail.com", "From Name");
var toAddress = new MailAddress("to@yahoo.com", "To Name");
const string fromPassword = "password";
const string subject = "test";
const string body = "Hey now!!";

var smtp = new SmtpClient
{
    Host = "smtp.gmail.com",
    Port = 587,
    EnableSsl = true,
    DeliveryMethod = SmtpDeliveryMethod.Network,
    Credentials = new NetworkCredential(fromAddress.Address, fromPassword),
    Timeout = 20000
};
using (var message = new MailMessage(fromAddress, toAddress)
{
    Subject = subject,
    Body = body
})
{
    smtp.Send(message);
}

Answer 3

对于"从服务器"工作的其他答案,首先打开访问权限以获取 Gmail帐户中安全性较低的应用程序.

看起来最近谷歌改变了它的安全政策.评分最高的答案不再有效,直到您按照此处所述更改帐户设置:https://support.google.com/accounts/answer/6010255？hl = zh-CN

截至2016年3月,谷歌再次更改了设置位置!

Answer 4

这是发送附带附件的电子邮件..简单而简短..

来源:http://coding-issues.blogspot.in/2012/11/sending-email-with-attachments-from-c.html

using System.Net;
using System.Net.Mail;

public void email_send()
{
    MailMessage mail = new MailMessage();
    SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");
    mail.From = new MailAddress("your mail@gmail.com");
    mail.To.Add("to_mail@gmail.com");
    mail.Subject = "Test Mail - 1";
    mail.Body = "mail with attachment";

    System.Net.Mail.Attachment attachment;
    attachment = new System.Net.Mail.Attachment("c:/textfile.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);

}

Answer 5

Google可能阻止某些不使用现代安全标准的应用或设备尝试登录.由于这些应用和设备更易于破解,因此阻止它们有助于确保您的帐户更安全.

一些不支持最新安全标准的应用程序示例包括:

• iOS或更低版本的iPhone或iPad上的Mail应用程序
  
• 8.1版本之前的Windows手机上的Mail应用程序
  
• 某些桌面邮件客户端,如Microsoft Outlook和Mozilla Thunderbird

因此,您必须在Google帐户中启用Less Secure Sign-In.

登录Google帐户后,请转到:

https://myaccount.google.com/lesssecureapps
或
https://www.google.com/settings/security/lesssecureapps

在C#中,您可以使用以下代码:

using (MailMessage mail = new MailMessage())
{
    mail.From = new MailAddress("email@gmail.com");
    mail.To.Add("somebody@domain.com");
    mail.Subject = "Hello World";
    mail.Body = "<h1>Hello</h1>";
    mail.IsBodyHtml = true;
    mail.Attachments.Add(new Attachment("C:\\file.zip"));

    using (SmtpClient smtp = new SmtpClient("smtp.gmail.com", 587))
    {
        smtp.Credentials = new NetworkCredential("email@gmail.com", "password");
        smtp.EnableSsl = true;
        smtp.Send(mail);
    }
}

Answer 6

这是我的版本:" 使用Gmail在C#中发送电子邮件 ".

using System;
using System.Net;
using System.Net.Mail;

namespace SendMailViaGmail
{
   class Program
   {
   static void Main(string[] args)
   {

      //Specify senders gmail address
      string SendersAddress = "Sendersaddress@gmail.com";
      //Specify The Address You want to sent Email To(can be any valid email address)
      string ReceiversAddress = "ReceiversAddress@yahoo.com";
      //Specify The password of gmial account u are using to sent mail(pw of sender@gmail.com)
      const string SendersPassword = "Password";
      //Write the subject of ur mail
      const string subject = "Testing";
      //Write the contents of your mail
      const string body = "Hi This Is my Mail From Gmail";

      try
      {
        //we will use Smtp client which allows us to send email using SMTP Protocol
        //i have specified the properties of SmtpClient smtp within{}
        //gmails smtp server name is smtp.gmail.com and port number is 587
        SmtpClient smtp = new SmtpClient
        {
           Host = "smtp.gmail.com",
           Port = 587,
           EnableSsl = true,
           DeliveryMethod = SmtpDeliveryMethod.Network,
           Credentials    = new NetworkCredential(SendersAddress, SendersPassword),
           Timeout = 3000
        };

        //MailMessage represents a mail message
        //it is 4 parameters(From,TO,subject,body)

        MailMessage message = new MailMessage(SendersAddress, ReceiversAddress, subject, body);
        /*WE use smtp sever we specified above to send the message(MailMessage message)*/

        smtp.Send(message);
        Console.WriteLine("Message Sent Successfully");
        Console.ReadKey();
     }

     catch (Exception ex)
     {
        Console.WriteLine(ex.Message);
        Console.ReadKey();
     }
    }
   }
 }

Answer 7

为了让我能够工作,我必须启用我的Gmail帐户才能让其他应用程序获得访问权限.这与"启用安全性较低的应用程序"进行,也通过此链接: https://accounts.google.com/b/0/DisplayUnlockCaptcha

Answer 8

我希望这段代码能正常工作.你可以尝试一下.

// Include this.                
using System.Net.Mail;

string fromAddress = "xyz@gmail.com";
string mailPassword = "*****";       // Mail id password from where mail will be sent.
string messageBody = "Write the body of the message here.";


// Create smtp connection.
SmtpClient client = new SmtpClient();
client.Port = 587;//outgoing port for the mail.
client.Host = "smtp.gmail.com";
client.EnableSsl = true;
client.Timeout = 10000;
client.DeliveryMethod = SmtpDeliveryMethod.Network;
client.UseDefaultCredentials = false;
client.Credentials = new System.Net.NetworkCredential(fromAddress, mailPassword);


// Fill the mail form.
var send_mail = new MailMessage();

send_mail.IsBodyHtml = true;
//address from where mail will be sent.
send_mail.From = new MailAddress("from@gmail.com");
//address to which mail will be sent.           
send_mail.To.Add(new MailAddress("to@example.com");
//subject of the mail.
send_mail.Subject = "put any subject here";

send_mail.Body = messageBody;
client.Send(send_mail);

Answer 9

包括这个,

using System.Net.Mail;

然后,

MailMessage sendmsg = new MailMessage(SendersAddress, ReceiversAddress, subject, body); 
SmtpClient client = new SmtpClient("smtp.gmail.com");

client.Port = Convert.ToInt16("587");
client.Credentials = new System.Net.NetworkCredential("mail-id@gmail.com","password");
client.EnableSsl = true;

client.Send(sendmsg);

Answer 10

为了避免 Gmail 中的安全问题，您应该首先从 Gmail 设置中生成一个应用密码，即使您使用两步验证，您也可以使用此密码而不是真实密码来发送电子邮件。

Answer 11

来源:在ASP.NET C中发送电子邮件#

下面是使用C#发送邮件的示例工作代码,在下面的示例中,我使用的是谷歌的smtp服务器.

代码非常自我解释,用您的电子邮件和密码值替换电子邮件和密码.

public void SendEmail(string address, string subject, string message)
{
    string email = "yrshaikh.mail@gmail.com";
    string password = "put-your-GMAIL-password-here";

    var loginInfo = new NetworkCredential(email, password);
    var msg = new MailMessage();
    var smtpClient = new SmtpClient("smtp.gmail.com", 587);

    msg.From = new MailAddress(email);
    msg.To.Add(new MailAddress(address));
    msg.Subject = subject;
    msg.Body = message;
    msg.IsBodyHtml = true;

    smtpClient.EnableSsl = true;
    smtpClient.UseDefaultCredentials = false;
    smtpClient.Credentials = loginInfo;
    smtpClient.Send(msg);
}

Answer 12

从 2022 年 6 月 1 日起，\xe2\x80\x8b\xe2\x80\x8bGoogle 添加了一些安全功能

\n

Google 不再支持使用要求您仅使用用户名和密码登录 Google 帐户或直接使用 Google 帐户的用户名和密码发送邮件的第三方应用程序或设备。但您仍然可以使用生成应用程序密码通过您的 Gmail 帐户发送电子邮件。

\n

\n

以下是生成新密码的步骤。

\n

\n

\n
1. 转到https://myaccount.google.com/security
\n
2. 开启两步验证。
\n
3. 如果需要，请通过电话确认您的帐户。
\n
4. 单击“两步验证”勾选下方的“应用程序密码”。请求邮件应用程序的新密码。
\n

\n

现在我们必须使用此密码来发送邮件，而不是您帐户的原始密码。

\n

\n

下面是发送邮件的示例代码

\n

\n

public static void SendMailFromApp(string SMTPServer, int SMTP_Port, string From, string Password, string To, string Subject, string Body) {            \n            var smtpClient = new SmtpClient(SMTPServer, SMTP_Port) {\n                DeliveryMethod = SmtpDeliveryMethod.Network,\n                UseDefaultCredentials = false,\n                EnableSsl = true\n            };                \n            smtpClient.Credentials = new NetworkCredential(From, Password); //Use the new password, generated from google!\n            var message = new System.Net.Mail.MailMessage(new System.Net.Mail.MailAddress(From, "SendMail2Step"), new System.Net.Mail.MailAddress(To, To));\n            smtpClient.Send(message);\n    }\n

\n

您可以像下面这样调用方法

\n

SendMailFromApp("smtp.gmail.com", 25, "mygmailaccount@gmail.com",\n          "tyugyyj1556jhghg",//This will be generated by google, copy it here.\n          "mailme@gmail.com", "New Mail Subject", "Body of mail from My App");\n

\n

Answer 13

如果您想发送背景电子邮件,请执行以下操作

 public void SendEmail(string address, string subject, string message)
 {
 Thread threadSendMails;
 threadSendMails = new Thread(delegate()
    {

      //Place your Code here 

     });
  threadSendMails.IsBackground = true;
  threadSendMails.Start();
}

并添加命名空间

using System.Threading;

Answer 14

尝试这个，

    private void button1_Click(object sender, EventArgs e)
    {
        try
        {
            MailMessage mail = new MailMessage();
            SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");

            mail.From = new MailAddress("your_email_address@gmail.com");
            mail.To.Add("to_address");
            mail.Subject = "Test Mail";
            mail.Body = "This is for testing SMTP mail from GMAIL";

            SmtpServer.Port = 587;
            SmtpServer.Credentials = new System.Net.NetworkCredential("username", "password");
            SmtpServer.EnableSsl = true;

            SmtpServer.Send(mail);
            MessageBox.Show("mail Send");
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.ToString());
        }
    }

Answer 15

更改 Gmail / Outlook.com 电子邮件的发件人：

为了防止欺骗 - Gmail/Outlook.com 不允许您从任意用户帐户名发送邮件。

如果您的发件人数量有限，您可以按照以下说明操作，然后将该From字段设置为此地址：从其他地址发送邮件

如果您想从任意电子邮件地址（例如用户输入电子邮件的网站上的反馈表，并且您不希望他们直接向您发送电子邮件）发送邮件，那么您能做的最好的事情是：

        msg.ReplyToList.Add(new System.Net.Mail.MailAddress(email, friendlyName));

这样，您只需在电子邮件帐户中点击“回复”即可在反馈页面上回复乐队的粉丝，但他们不会收到您的实际电子邮件，这可能会导致大量垃圾邮件。

如果您处于受控环境中，这效果很好，但请注意，我看到一些电子邮件客户端即使指定了回复（我不知道是哪一个）也会发送到发件人地址。

Answer 16

我遇到了同样的问题，但通过转到 Gmail 的安全设置和允许安全性较低的应用程序解决了这个问题。Domenic & Donny 的代码有效，但前提是您启用了该设置

如果您已登录（Google），您可以点击此链接并切换“打开” “访问不太安全的应用程序”

Answer 17

用这种方式

MailMessage sendmsg = new MailMessage(SendersAddress, ReceiversAddress, subject, body); 
SmtpClient client = new SmtpClient("smtp.gmail.com");

client.Port = Convert.ToInt32("587");
client.EnableSsl = true;
client.Credentials = new System.Net.NetworkCredential("mail-id@gmail.com","MyPassWord");
client.Send(sendmsg);

不要忘记这一点：

using System.Net;
using System.Net.Mail;

Answer 18

using System;
using System.Net;
using System.Net.Mail;

namespace SendMailViaGmail
{
   class Program
   {
   static void Main(string[] args)
   {

      //Specify senders gmail address
      string SendersAddress = "Sendersaddress@gmail.com";
      //Specify The Address You want to sent Email To(can be any valid email address)
      string ReceiversAddress = "ReceiversAddress@yahoo.com";
      //Specify The password of gmial account u are using to sent mail(pw of sender@gmail.com)
      const string SendersPassword = "Password";
      //Write the subject of ur mail
      const string subject = "Testing";
      //Write the contents of your mail
      const string body = "Hi This Is my Mail From Gmail";

      try
      {
        //we will use Smtp client which allows us to send email using SMTP Protocol
        //i have specified the properties of SmtpClient smtp within{}
        //gmails smtp server name is smtp.gmail.com and port number is 587
        SmtpClient smtp = new SmtpClient
        {
           Host = "smtp.gmail.com",
           Port = 587,
           EnableSsl = true,
           DeliveryMethod = SmtpDeliveryMethod.Network,
           Credentials = new NetworkCredential(SendersAddress, SendersPassword),
           Timeout = 3000
        };

        //MailMessage represents a mail message
        //it is 4 parameters(From,TO,subject,body)

        MailMessage message = new MailMessage(SendersAddress, ReceiversAddress, subject, body);
        /*WE use smtp sever we specified above to send the message(MailMessage message)*/

        smtp.Send(message);
        Console.WriteLine("Message Sent Successfully");
        Console.ReadKey();
     }
     catch (Exception ex)
     {
        Console.WriteLine(ex.Message);
        Console.ReadKey();
     }
}
}
}