邮件发送失败 [英] Failure sending mail

问题描述

 尝试 
 {
 如果 （Upload_image.HasFile&& Upload_sign.HasFile&& Captcha1.UserValidated）
 {
  int  i = cmd.ExecuteNonQuery（） ; 
  if （i >   0 ）
 {
  //  成功提交表格后，将注册号码发送到用户的邮箱 
 SmtpClient smtpc =  new  SmtpClient（  smtp.gmail.com）; 
 smtpc.Port =  587 ; 
 smtpc.EnableSsl =  true ; 
 smtpc.UseDefaultCredentials =  false ; 
  string  user =   ajay.mukesh @ gmail.com;  //  <  - 在此处输入您的Gmail代码 
  string  pass =   password;  //  <  - 在此输入您的Gmail密码 
  string  sub =  表格填写申请表：;  //  您网站的主题 
  string  msg =   Webcome to http://msdotnet.co.in您的注册号是： + Label2.Text;  //  邮件正文 
 smtpc.Credentials = 新的 NetworkCredential（用户，通行证）; 
 MailMessage email =  new  MailMessage（user，TextBox6.Text，sub，msg）; 
 email.IsBodyHtml =  true ; 
 smtpc.Send（电子邮件）; 
 
 Label1.Text =  您的表单已成功提交。立即预览，注册数字是：; 
 Label3.Text =  null ; 
} 
  else  
 {
 Label1.Text =  您的表单未成功提交请稍后再试; 
 Label3.Text =  null ; 
 Label2.Text =  null ; 
} 
} 
  else  
 {
 Label3.ForeColor = System.Drawing.Color.Red; 
 Label3.Text =  输入有效的验证码; 
 Label2.Text =  null ; 
} 
} 
  catch （例外情况）
 {
 Label1.Text = ex.Message; 
} 
 最后 
 {
 con.Close（）; 
} 

解决方案

  var  client =  new  SmtpClient（  smtp.gmail。 com， 587 ）
 {
 Credentials =  new  NetworkCredential （  [e-mail]，  密码），
 EnableSsl =  true  
}; 
 client.Send（ new  MailMessage（user，recepients，sub，msg）
 {IsBodyHtml = 真的}; 

这段代码一直对我有用......



尝试创建一个简单的控制台项目...



我的猜测是你需要检查对TO字段的引用...



如果您要发送一封电子邮件，您只需传递一个字符串......但是当您需要发送倍数时，文档似乎建议， 应该用来分隔收件人......

 message.To.Add（ 一个@ example.com，两个@ example.com））; 

或者

 client.Send（ new  MailMessage（user，  一个@ example.com，两个@ example.com，sub，msg）
 {IsBodyHtml =  true }; 

如果没有空格，它永远不会看起来整洁...

try
              {
                  if (Upload_image.HasFile && Upload_sign.HasFile && Captcha1.UserValidated)
                  {
                     int i = cmd.ExecuteNonQuery();
                      if (i > 0)
                      {
                          // Send Regisration number to user's mail box after submitting the form successfully
                          SmtpClient smtpc = new SmtpClient("smtp.gmail.com");
                          smtpc.Port =587;
                          smtpc.EnableSsl = true;
                          smtpc.UseDefaultCredentials = false;
                          string user = "[e-mail]"; //<--Enter your gmail id here
                          string pass = "password";//<--Enter Your gmail password here
                          string sub = "Form filling Application:"; //Subject for your website
                          string msg = "Webcome to http://msdotnet.co.in Your Registration Number is: " + Label2.Text;  //Message body
                          smtpc.Credentials = new NetworkCredential(user, pass);
                          MailMessage email = new MailMessage(user, TextBox6.Text, sub, msg);
                          email.IsBodyHtml = true;
                          smtpc.Send(email);

                          Label1.Text = "Your form has been submitted successfully.Take Preview Now,Your Registration Number is: ";
                          Label3.Text = null;
                      }
                      else
                      {
                          Label1.Text = "Your form has been not submitted successfully try again later";
                          Label3.Text = null;
                          Label2.Text = null;
                      }
                  }
                  else
                  {
                      Label3.ForeColor = System.Drawing.Color.Red;
                      Label3.Text = "Enter Valid Captcha code";
                      Label2.Text = null;
                  }
              }
              catch (Exception ex)
              {
                  Label1.Text = ex.Message;
              }
              finally
              {
                  con.Close();
              }

解决方案

var client = new SmtpClient("smtp.gmail.com", 587)
            {
                Credentials = new NetworkCredential("[e-mail]", "password"),
                EnableSsl = true
            };
            client.Send(new MailMessage(user, recepients, sub, msg) 
{ IsBodyHtml = true};

This snippet has always worked for me...

Try creating a simple console project...

My guess is that you need to check the reference to the "TO" field...

If you are sending a single email, you can just pass a string... But when you need to send multiples, the documentation seems to suggest that a "," should be used to separate the receipents...

message.To.Add("[e-mail],[e-mail]"));

or

client.Send(new MailMessage(user, "[e-mail],[e-mail]", sub, msg) 
{ IsBodyHtml = true};

it never looks neat without the spaces...

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