[转载]ASP.NET MVC 3 开发的20个秘诀（五）[20 Recipes for Programming MVC 3]：发送欢迎邮件

    <appSettings>
 
        <add key="webpages:Version" value="1.0.0.0" />
        <add key="ClientValidationEnabled" value="true" />
        <add key="UnobtrusiveJavaScriptEnabled" value="true" />
        <add key="smtpServer" value="localhost" />
        <add key="smtpPort" value="25" />
        <add key="smtpUser" value="" />
        <add key="smtpPass" value="" />
        <add key="adminEmail" value="no-reply@no-reply.com" />

    </appSettings>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Net.Mail;
using System.Net;
using System.Configuration;

namespace MvcApplication4.Utils
{
    public static class MailClient
    {
        private static readonly SmtpClient Client;

        static MailClient()
        {
            Client = new SmtpClient
            {
                Host =
                ConfigurationManager.AppSettings["SmtpServer"],
                Port =
                Convert.ToInt32(
                ConfigurationManager.AppSettings["SmtpPort"]),
                DeliveryMethod = SmtpDeliveryMethod.Network
            };

            Client.UseDefaultCredentials = false;
            Client.Credentials = new NetworkCredential(
            ConfigurationManager.AppSettings["SmtpUser"],
            ConfigurationManager.AppSettings["SmtpPass"]);
        }

        private static bool SendMessage(string from, string to,
        string subject, string body)
        {
            MailMessage mm = null;
            bool isSent = false;

            try
            {
                // Create our message
                mm = new MailMessage(from, to, subject, body);
                mm.DeliveryNotificationOptions =
                DeliveryNotificationOptions.OnFailure;
                // Send it
                Client.Send(mm);
                isSent = true;
            }
            // Catch any errors, these should be logged and
            // dealt with later
            catch (Exception ex)
            {
                // If you wish to log email errors,
                // add it here...
                var exMsg = ex.Message;
            }
            finally
            {
                mm.Dispose();
            }

            return isSent;
        }

        public static bool SendWelcome(string email)
        {
            string body = "Put welcome email content here...";

            return SendMessage(
            ConfigurationManager.AppSettings["adminEmail"],
            email, "Welcome message", body);
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing;
using System.Web.Security;
using MvcApplication4.Models;
using MvcApplication4.Utils;

namespace MvcApplication4.Controllers
{
    public class AccountController : Controller
    {
            …
        //
        // POST: /Account/Register
        [HttpPost]
        public ActionResult Register(RegisterModel model)
        {
            if (ModelState.IsValid)
            {
                // Attempt to register the user
                MembershipCreateStatus createStatus;
                Membership.CreateUser(model.UserName,
                model.Password, model.Email, null, null,
                true, null, out createStatus);
                if (createStatus ==
                MembershipCreateStatus.Success)
                {
                    // Send welcome email
                    MailClient.SendWelcome(model.Email);
                    FormsAuthentication.SetAuthCookie(
                    model.UserName,
                    false /* createPersistentCookie */);
                    return RedirectToAction("Index", "Home");
                }
                else
                {
                    ModelState.AddModelError("",
                    ErrorCodeToString(createStatus));
                }
            }
            // If we got this far, something failed,
            // redisplay form
            return View(model);
        }

    }
}