为什么我不能在C＃中的一行发送两个邮件？ [英] Why can't i send two mails in a row with c#?

问题描述

我送使用使用SmtpClient C＃电子邮件。我不得不每天发送aproximately百不同的电子邮件，并根据收件人我不能使用相同的邮件（添加多个收件人），因为电子邮件的变化。

我不使用一个本地的SMTP服务器，我的理解（根据@rizzle响应的这里）
的一段时间了。不过，我睡我的程序10秒，不过，这仅仅是被发送了第一封电子邮件，从来没有第二个（到目前为止我想有两个电子邮件，而不是一百我的系统）。这是我的代码，任何想法？

 的foreach（在clientList人P）
 {
 AlternateView普莱恩维尔= AlternateView.CreateAlternateViewFromString（Texto可见对clientes阙无蒂嫩HTML，NULL，text / plain的）; 
 // AlternateView htmlView = AlternateView.CreateAlternateViewFromString（这是一个嵌入式图像和LT; IMG SRC = CID：&CompanyLogo的GT;空的text / html）; 
 
串htmlString =邮件的HTML字符串身体; 
 AlternateView htmlView = AlternateView.CreateAlternateViewFromString（htmlString，空，text / html的）; 
 
 System.Net.Mail.MailMessage消息=新System.Net.Mail.MailMessage（）; 
 message.AlternateViews.Add（htmlView）; 
 message.To.Add（p.email.Trim（））; 
 message.Subject = p.nombre +，邮件主题; 
 message.From =新System.Net.Mail.MailAddress（FROMADDRESS）; 
 System.Net.Mail.SmtpClient客户端=新System.Net.Mail.SmtpClient（...）; 
的NetworkCredential myCreds =新的NetworkCredential（USR，传球，）; 
 client.Credentials = myCreds; 
 client.Send（消息）; 
 System.Threading.Thread.Sleep（10000）; 
 
} 
  

解决方案

执行 client.Dispose（）您发送最后一条消息之后，如果你在DOTNET 4.这将迫使DOTNET SMTP东西完成其工作。

在这里看到：的 System.Net.Mail MAILMESSAGE和不发送消息立即

如果您在早期版本的DOTNET的，尝试做一些事情。

不要 message.Dispose（）当你与消息实例完成。

定义你的本地SmtpClient的方法（内），并退出当你完成发送方法。也就是说，不要试图围绕保持你的客户实例作为你的长寿命类实例的一个领域;它不会刷新，直到它完成您向服务器发送的最后一条消息。

（他们真的在DOTNET 4.0解决这个问题）

I am sending emails using c# using SmtpClient. I have to send aproximately one hundred different emails per day, and I can't use the same mail (adding several recipients) since the email changes according to the recipient.

I am not using a local SMTP server, and I understand (according to @rizzle response here) that some time has to be left between one mail and another one. However, I am sleeping my program for 10 seconds and still, it is only the first email that gets sent, never the second one (so far I am trying my system with two emails instead of one hundred). This is my code, any ideas?

foreach (Person p in clientList)
            {
                AlternateView plainView = AlternateView.CreateAlternateViewFromString("Texto visible para clientes que no tienen HTML", null, "text/plain");
                //AlternateView htmlView = AlternateView.CreateAlternateViewFromString("Here is an embedded image.<img src=cid:companylogo>", null, "text/html");

                string htmlString = "html string body of the email";
                AlternateView htmlView = AlternateView.CreateAlternateViewFromString(htmlString, null, "text/html");

                System.Net.Mail.MailMessage message = new System.Net.Mail.MailMessage();
                message.AlternateViews.Add(htmlView);
                message.To.Add(p.email.Trim());
                message.Subject = p.nombre+", email subject";
                message.From = new System.Net.Mail.MailAddress(fromAddress);
                System.Net.Mail.SmtpClient client = new System.Net.Mail.SmtpClient("...");
                NetworkCredential myCreds = new NetworkCredential(usr, pass, "");
                client.Credentials = myCreds;
                client.Send(message);
                System.Threading.Thread.Sleep(10000);

            }

解决方案

Do client.Dispose() right after you send your last message, if you're on dotnet 4. This will force the dotnet SMTP stuff to finish its work.

See here: System.Net.Mail and MailMessage not Sending Messages Immediately

If you're on earlier versions of DotNet, try doing a couple of things.

Do message.Dispose() when you're done with the message instance.

Define your SmtpClient locally (within a method) and exit the method when you're done sending. That is, don't try to keep your client instance around as a field in one of your long-lived class instances; it won't flush the last message you sent to the server until it's finalized.

(They really did fix this in dotnet 4.0)

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