使用MVC5 ASP.NET和机架空间发送电子邮件

Question

我使用了一个教程，在我的MVC5应用联系人表格中设置电子邮件并通过电子邮件发送。 我很茫然。 我尝试了几种不同的选择，但我只是缺少一些东西。 帮助非常感谢！

我的邮件主机是机架空间，其设置可在http://www.rackspace.com/apps/support/portal/1088上获得 。

一切正常，除非我在SendFinalMail函数中一直收到smpt.Send（MailInfo）的错误。

SmtpException occurred
A first chance exception of type 'System.Net.Mail.SmtpException' occurred in System.dll

Additional information: The operation has timed out.

根据评论添加了StackTrace（如果您需要更多信息，请告诉我）：

System.Net.Mail.SmtpException occurred
  _HResult=-2146233088
  _message=The operation has timed out.
  HResult=-2146233088
  IsTransient=false
  Message=The operation has timed out.
  Source=System
  StackTrace:
       at System.Net.Mail.SmtpClient.Send(MailMessage message)
  InnerException: 

这是我的代码：

Web.config

  <appSettings>

    <!--EMAIL SERVICES-->
    <add key="FromAddress" value="myfrom@address" />
    <add key="UserID" value="myfrom@address" />
    <add key="Password" value="myPassword" />
    <add key="SMTPPort" value="465" />
    <add key="SmtpClient" value="secure.emailsrvr.com" />
    <add key="EnableSSL" value="Yes" />
    <add key="UnobtrusiveJavaScriptEnabled" value ="true"/>
  </appSettings>

楷模

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net.Mail;

namespace SandBox.MailManager
{
    class MailManager
    {
        #region Private for email
        private string FromAddress { get; set; }
        private string EmailHost { get; set; }
        private string Pwd { get; set; }
        private string UserID { get; set; }
        private string SMTPPort { get; set; }
        private Boolean bEnableSSL { get; set; }


        #endregion


#region Default Functions for Mailing
            public MailManager()
            {
                FromAddress = System.Configuration.ConfigurationManager.AppSettings["FromAddress"];
                UserID = System.Configuration.ConfigurationManager.AppSettings.Get("UserID");
                SMTPPort = System.Configuration.ConfigurationManager.AppSettings.Get("SMTPPort");
                Pwd = System.Configuration.ConfigurationManager.AppSettings.Get("Password");
                EmailHost = System.Configuration.ConfigurationManager.AppSettings.Get("SmtpClient");

                if (System.Configuration.ConfigurationManager.AppSettings.Get("EnableSSL").ToUpper() == "YES")
                {
                    bEnableSSL = true;
                }
                else
                {
                    bEnableSSL = false;
                }
            }


private bool SendFinalMail(MailMessage MailInfo)
        {
            try
            {
                SmtpClient smtp = new SmtpClient();
                smtp.Host = EmailHost;
                smtp.Port = Convert.ToInt16(SMTPPort);
                smtp.Credentials = new System.Net.NetworkCredential(UserID, Pwd);
                smtp.EnableSsl = bEnableSSL;
                //smtp.Send(MailInfo);

                System.Threading.Thread emailThread;
                emailThread = new System.Threading.Thread(delegate()
                {
                    smtp.Send(MailInfo);
                });

                emailThread.IsBackground = true;
                emailThread.Start();

                return true;
            }
            catch (Exception e)
    {
        Console.WriteLine(e);
        return false;
        }
        }
        #endregion


 public bool SendEnquiryEmail(string ToUserEmail, string htmlBody)
        {
            try
            {
                MailMessage mail = new MailMessage();
                mail.From = new MailAddress(FromAddress);
                mail.To.Add(ToUserEmail);
                mail.CC.Add("another@email");
                mail.Subject = "Thank you. Our team will be in touch shortly";
                mail.Body = htmlBody;
                mail.IsBodyHtml = true;

                return this.SendFinalMail(mail);
            }
            catch
            {
                return false;
            }
        }
    }
}

调节器

[HttpPost]
        [ValidateAntiForgeryToken]
        public ActionResult Contact(ContactModel Contact)
        {
            if (ModelState.IsValid) { 
                try
                {
                    MailManager.MailManager oMail = new MailManager.MailManager();

                    string htmlBody = "<html><body>Hi, ";
                    htmlBody += "<p>We've receive your message and we will in touch shortly to responded to your message,</p>";
                    htmlBody += "<br /><br /><p>You can email us directly at <a href='#'>.</p>";
                    htmlBody += "<br /><br /><p>The message we have received from you is:</p>";
                    htmlBody += "<br /><br /><p>" + Contact.Message + "</p>";
                    htmlBody += "<p><br /> Regards,</p> </body></html>";

                    bool SendEmail = oMail.SendEnquiryEmail(Contact.Email, htmlBody);

                    if (SendEmail == true)
                    {
                        return View();
                    }
                    else { 
                        return View();
                    }
                }
                catch (Exception)
                {
                    return View();
                }
            }
            return View("Model not Valid");
        }

Answer 1

我已经知道答案了。 答案是：因为System.Net.Mail不支持“隐式” SSL，所以仅“显式” SSL。

我通过端口465使用SSL，导致这些问题。 我更改了主机，端口和enableSSL，使其成为不安全的连接，并且工作正常。

从那以后，我发现如果我使用TLS端口587并启用SSL，则不是从ssl端口465发送，而是可以工作。 这篇文章对我有答案

通过Gmail在.NET中发送电子邮件