邮件发送已经说烂了的功能

       我相信每一个系统，都会有邮件发送的场景，而且这种使用场景有很多，比如登入一个系统，忘记密码，那就要通过忘记密码功能，检查你注册邮件，然后发一封重设密码的邮件给你（当然现在可能通过手机验证码处理的方案多）。

      到今天为止我一直以为，.NET发送邮件组件有很多，我之前了解的有.Net 自带的System.Net.Mail，JMail，MimeKit&MailKit。

今天我用度娘搜索了一下“发送邮件 组件”，搜索结果大概汇总一下，.Net 自带的，CDO 组件，JMail 组件 就这三个。没有搜索到 MimeKit&MailKit，

但是单独搜“MailKit”能够搜索到，而且是大牛 张善友 写的，那我暂时先说一下 MimeKit&MailKit吧。

友情推荐一下 张善友 http://www.cnblogs.com/shanyou/p/4034298.html 

MimeKit&MailKit 外国开源邮件发送组件，其实是由两个组件组成

MimeKit 负责处理寄件者，消息，附件 等等内容相关的。

MimeKit 官网：http://www.mimekit.net/

MimeKit GitHub https://github.com/jstedfast/MimeKit

开发指南：http://www.mimekit.net/docs/html/Introduction.htm

MailKit 负责发送相关的。

MailKit GitHub：https://github.com/jstedfast/MailKit

贴几段代码让大家感受一下

MimeKit 部分

var message = new MimeMessage (); message.From.Add (new MailboxAddress ("Joey", "[email protected]")); message.To.Add (new MailboxAddress ("Alice", "[email protected]")); message.Subject = "How you doin?"; message.Body = new TextPart ("plain") { Text = @"Hey Alice, What are you up to this weekend? Monica is throwing one of her parties on Saturday and I was hoping you could make it. Will you be my +1? -- Joey " };

var message = new MimeMessage (); message.From.Add (new MailboxAddress ("Joey", "[email protected]")); message.To.Add (new MailboxAddress ("Alice", "[email protected]")); message.Subject = "How you doin?"; // create our message text, just like before (except don't set it as the message.Body)
var body = new TextPart ("plain") { Text = @"Hey Alice, What are you up to this weekend? Monica is throwing one of her parties on Saturday and I was hoping you could make it. Will you be my +1? -- Joey " }; // create an image attachment for the file located at path
var attachment = new MimePart ("image", "gif") { ContentObject = new ContentObject (File.OpenRead (path), ContentEncoding.Default), ContentDisposition = new ContentDisposition (ContentDisposition.Attachment), ContentTransferEncoding = ContentEncoding.Base64, FileName = Path.GetFileName (path) }; // now create the multipart/mixed container to hold the message text and the // image attachment
var multipart = new Multipart ("mixed"); multipart.Add (body); multipart.Add (attachment); // now set the multipart/mixed as the message body
message.Body = multipart;

   var message = new MimeMessage (); message.From.Add (new MailboxAddress ("Joey", "[email protected]")); message.To.Add (new MailboxAddress ("Alice", "[email protected]")); message.Subject = "How you doin?"; var builder = new BodyBuilder (); // Set the plain-text version of the message text
            builder.TextBody = @"Hey Alice, What are you up to this weekend? Monica is throwing one of her parties on Saturday and I was hoping you could make it. Will you be my +1? -- Joey "; // In order to reference sexy-pose.jpg from the html text, we'll need to add it // to builder.LinkedResources and then use its Content-Id value in the img src.
            var image = builder.LinkedResources.Add (@"C:\Users\Joey\Documents\Selfies\sexy-pose.jpg"); image.ContentId = MimeUtils.GenerateMessageId (); // Set the html version of the message text
            builder.HtmlBody = string.Format (@"<p>Hey Alice,<br> <p>What are you up to this weekend? Monica is throwing one of her parties on Saturday and I was hoping you could make it.<br> <p>Will you be my +1?<br> <p>-- Joey<br> <center><img src=""cid:{0}""></center>", image.ContentId); // We may also want to attach a calendar event for Monica's party...
            builder.Attachments.Add (@"C:\Users\Joey\Documents\party.ics"); // Now we just need to set the message body and we're done
            message.Body = builder.ToMessageBody ();

怎么样？是不是感觉老外写得东西，比较好看，易懂啊。

MailKit 部分

using System; using MailKit.Net.Smtp; using MailKit; using MimeKit; namespace TestClient { class Program { public static void Main (string[] args) { var message = new MimeMessage (); message.From.Add (new MailboxAddress ("Joey Tribbiani", "[email protected]")); message.To.Add (new MailboxAddress ("Mrs. Chanandler Bong", "[email protected]")); message.Subject = "How you doin'?"; message.Body = new TextPart ("plain") { Text = @"Hey Chandler, I just wanted to let you know that Monica and I were going to go play some paintball, you in? -- Joey" }; using (var client = new SmtpClient ()) { client.Connect ("smtp.friends.com", 587, false); // Note: since we don't have an OAuth2 token, disable // the XOAUTH2 authentication mechanism.
                client.AuthenticationMechanisms.Remove ("XOAUTH2"); // Note: only needed if the SMTP server requires authentication
                client.Authenticate ("joey", "password"); client.Send (message); client.Disconnect (true); } } } }

这个是不是感觉跟.Net 发送邮件部分差不多啊！

下面是我封装的.Net 发送邮件部分代码，做个对比

    public class Mail { private static SystemMailHostConfig _config; public static Mail SystemMail { get { return new Mail(); } } public Mail() { _config = new SystemMailHostConfig { FromName = MailConfig.SystemMailFromName, From = MailConfig.SystemMailFrom, MailHostConfig = new MailHostConfig { HostName = MailConfig.SmtpHostName, Account = MailConfig.MailAccount, Password = MailConfig.MailPassword } }; } public Mail(SystemMailHostConfig config) { _config = config; } /// <summary>
        /// 发送邮件 /// </summary>
        /// <param name="context"></param>
        /// <param name="message">默认为null。 System.Net.Mail.MailMessage </param>
        public void Send(MailContext context, MailMessage message = null) { //ServicePointManager.ServerCertificateValidationCallback = CheckValidationResult;
            var sender = new SmtpClient(); message = message ?? new MailMessage(); if (context.Receivers.IsNotNullOrEmpty()) { message.To.AddRange(context.Receivers.ToArray()); } if (context.Ccs.IsNotNullOrEmpty()) { message.CC.AddRange(context.Ccs.ToArray()); } if (context.Bccs.IsNotNullOrEmpty()) { message.Bcc.AddRange(context.Bccs.ToArray()); } message.Subject = context.Subject; message.Body = context.Body; if (context.Attachments.IsNotNullOrEmpty()) { message.Attachments.AddRange(context.Attachments.ToArray()); } message.IsBodyHtml = true; try { message.From = new MailAddress(_config.From, _config.FromName); sender.Port = 2620; sender.Host = _config.MailHostConfig.HostName; sender.UseDefaultCredentials = false; sender.Credentials = new NetworkCredential(_config.MailHostConfig.Account, _config.MailHostConfig.Password); sender.DeliveryMethod = SmtpDeliveryMethod.Network; sender.EnableSsl = true; sender.Send(message); } catch { _config = new SystemMailHostConfig { FromName = MailConfig.StandbySystemMailFromName, From = MailConfig.StandbySystemMailFrom, MailHostConfig = new MailHostConfig { HostName = MailConfig.StandbySmtpHostName, Account = MailConfig.StandbyMailAccount, Password = MailConfig.StandbyMailPassword } }; message.From = new MailAddress(_config.From, _config.FromName); sender.Port = 587; sender.Host = _config.MailHostConfig.HostName; sender.UseDefaultCredentials = false; sender.Credentials = new NetworkCredential(_config.MailHostConfig.Account, _config.MailHostConfig.Password); sender.DeliveryMethod = SmtpDeliveryMethod.Network; sender.EnableSsl = true; sender.Send(message); } } }

MimeKit 和 MailKit 支持最新的国际化的电子邮件标准，是.NET 中为一个支持完整支持这些标准电子邮件库，且它还支持.NET/Mono的所有平台，包括移动电话、平板等，希望大家在架构多一种方案，多一种选择。