Question

好的，我输入后立即注意到可能涵盖同一问题的变体主题。我访问了他们中的大部分，发现与我提出的问题没有直接关系，所以我要求耐心。

无论如何，我正在使用VS2010创建一个ASP.NET Web应用程序。我正在尝试使用代码通过smtp发送电子邮件：

        MailMessage mailMsg = new MailMessage();

        mailMsg.From = new MailAddress(fromEmail);
        mailMsg.To.Add(toEmail);
        mailMsg.Subject = emailSubj.ToString().Trim();
        mailMsg.Body = msgBody.ToString().Trim();
        SmtpClient smtpClient = new SmtpClient();
        smtpClient.Send(mailMsg);

但每次我收到以下异常（SMTPException和innerException表示{"Unable to connect to the remote server"}

我还在web.config中定义了以下内容：

<system.net>
  <mailSettings>
    <smtp>
      <network host="company.com"/>
    </smtp>
  </mailSettings>
</system.net>

我要做的是在提交带有请求ID的表单后发送电子邮件，以便可以通过其他页面访问（除了邮件之外的所有工作）。在我们使用Exchange服务器的公司中，当我转到我的联系人属性时，我得到smtp:emailaddress@company.com

那么这里要做什么？我已经检查了Web Services ExchangeServiceBinding但是无法直接找到帮助我的东西（所以任何链接都赞赏）

非常感谢，期待阅读您的回复：）

Answer 1

试试这个独立的C＃应用程序，看看主机名是否有效。否则，您需要联系管理员以获取正确的地址。

      /// <summary>
      ///Method to Send an Email informing interested parties about the status of data extraction. 
      /// INPUTS : int iProcessIsSuccess : int informing about the success of the process. -1 means failure, 0 means partial success, 1 means success. 
      ///          string szLogDataToBeSent :  Log data to be sent incase process not successful.
      /// OUTPUTS : bool. True if success, else false.
      /// </summary>
      public bool SendEmailNotification(string szEmailAddressFileName, int iProcessIsSuccess, string szLogDataToBeSent)
      {
         bool bSuccess = false;

         //the the SMTP host.
         SmtpClient client = new SmtpClient();

         //SMTP Server
         client.Host = CommonVariables.EMAIL_SMTP_SERVER;

         //SMTP Credentials
         client.Credentials = new NetworkCredential(CommonVariables.EMAIL_USERNAME, CommonVariables.EMAIL_PASSWORD);

         //Creating a new mail.
         MailMessage mail = new MailMessage();

         //Filling 'From' Tab.
         mail.From = new MailAddress(CommonVariables.EMAIL_SENDERS_ADDRESS, CommonVariables.EMAIL_SENDERS_NAME);

         //Filling 'To' tab.
         List<EmailAddress> EmailAddressList = new List<EmailAddress>();
         try
         {
            using (System.IO.FileStream fs = new FileStream(szEmailAddressFileName, FileMode.Open))
            {
               XmlSerializer xs = new XmlSerializer(typeof(List<EmailAddress>));
                EmailAddressList = xs.Deserialize(fs) as List<EmailAddress>;
            }

            foreach (EmailAddress addr in EmailAddressList)
            {
               mail.To.Add(addr.RecepientEmailAddress);
            }
         }
         catch(Exception Ex)
         {
            mail.To.Add("DefautEmailId@company.com");
         }

         //Filling mail body.
         string szMailBody = "";
         string szMailSubject = "";

         if (1 == iProcessIsSuccess) //Success
         {
            szMailSubject = String.Format(CommonVariables.EMAIL_SUBJECT_BOILER_PLATE, "a SUCCESS");
            szMailBody = String.Format(CommonVariables.EMAIL_BODY_BOILER_PLATE, DateTime.UtcNow.ToString(), Environment.MachineName);
            szMailBody += "\r\n" + szMailSubject + "\r\n";

         }
         else if (0 == iProcessIsSuccess) //Partially Success
         {
            szMailSubject = String.Format(CommonVariables.EMAIL_SUBJECT_BOILER_PLATE, "a PARTIAL SUCCESS"); ;
            szMailBody = String.Format(CommonVariables.EMAIL_BODY_BOILER_PLATE, DateTime.UtcNow.ToString(), Environment.MachineName);
            szMailBody += "\r\n"+ szMailSubject + "\r\n";
            szMailBody += "\r\n" + "The Log data is as follows:\r\n";
            szMailBody += szLogDataToBeSent;
            mail.Priority = MailPriority.High;
         }
         else //Failed
         {
            szMailSubject = String.Format(CommonVariables.EMAIL_SUBJECT_BOILER_PLATE, "a FAILURE"); ;
            szMailBody = String.Format(CommonVariables.EMAIL_BODY_BOILER_PLATE, DateTime.UtcNow.ToString(), Environment.MachineName);
            szMailBody += "\r\n" + szMailSubject + "\r\n";
            szMailBody += "\r\n" + "The Log data is as follows:\r\n";
            szMailBody += szLogDataToBeSent;
            mail.Priority = MailPriority.High;
         }

         mail.Body = szMailBody;

         mail.Subject = szMailSubject;

         //Send Email.
         try
         {
            client.Send(mail);
            bSuccess = true;
         }
         catch (Exception Ex)
         {
            bSuccess = false;
         }

         // Clean up.
         mail.Dispose();


         return bSuccess;

      }

   }

Answer 2

与您的系统管理员联系，获取您需要配置的Exchange Server的名称。

Answer 3

有时smtp服务器与您正在查看的不同。例如：我的电子邮件是myemployee@mycompany.com，我的实际smtp服务器是 server1.mail.mycompany.com，server2.mail.mycompany.com 您必须向管理员询问此服务器名称

之后询问您的用户是否在AD上定义，是否需要对每个smtp发送进行身份验证？

您的交换主机是否使用SMTP over TLS？ AFAIK一些交换管理员使用SMTP over SSL或TLS声明。您可以通过获取其电子邮件的当前Exchange / Windows证书，查看有关使用SMTP over SSL或TLS发送的MSDN文档。

ASP.NET Exchange Server发送电子邮件C＃

3 个答案: