C#操作QQ邮箱发送电子邮件原来这么简单。。。。

　　在贴代码之前，首先需要给QQ邮箱开服务IMAP/SMTP服务，详细开通方法见 "开通方法"(可能需要发送收费短信，所以只要开通这一个服务就好了)。

这边主要就是为了一个服务的授权码，如下图：

                  

服务开好之后，直接上代码了（一个邮件帮助类）：

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using System; using System.Collections.Generic; using System.Linq; using System.Net.Mail; using System.Net.Mime; using System.Text;   namespace Mail {     public class SendMail     {         private MailMessage mailMessage;         private SmtpClient smtpClient;         private string password;//发件人密码          /// <summary>          /// 设置MailMessage的实例         /// </summary>          /// <param name="To">收件人地址</param>          /// <param name="From">发件人地址</param>          /// <param name="Body">邮件正文</param>          /// <param name="Title">邮件的主题</param>          /// <param name="Password">发件人密码</param>          public SendMail(string[] To, string From, string Body, string Title, string Password)         {             mailMessage = new MailMessage();             foreach (var item in To)             {                 mailMessage.To.Add(item);             }             mailMessage.From = new System.Net.Mail.MailAddress(From);             mailMessage.Subject = Title;             mailMessage.Body = Body;             mailMessage.IsBodyHtml = true;             mailMessage.BodyEncoding = System.Text.Encoding.UTF8;             mailMessage.Priority = System.Net.Mail.MailPriority.Normal;             this.password = Password;         }         /// <summary>          /// 添加附件          /// </summary>          public void Attachments(string Path)         {             string[] path = Path.Split(',');             Attachment data;             ContentDisposition disposition;             for (int i = 0; i < path.Length; i++)             {                 data = new Attachment(path[i], MediaTypeNames.Application.Octet);//实例化附件                  disposition = data.ContentDisposition;                 disposition.CreationDate = System.IO.File.GetCreationTime(path[i]);//获取附件的创建日期                  disposition.ModificationDate = System.IO.File.GetLastWriteTime(path[i]);//获取附件的修改日期                  disposition.ReadDate = System.IO.File.GetLastAccessTime(path[i]);//获取附件的读取日期                  mailMessage.Attachments.Add(data);//添加到附件中              }         }         /// <summary>          /// 异步发送邮件          /// </summary>          /// <param name="CompletedMethod"></param>          public void SendAsync(SendCompletedEventHandler CompletedMethod)         {             if (mailMessage != null)             {                 smtpClient = new SmtpClient();                 smtpClient.EnableSsl = true;// 指定 System.Net.Mail.SmtpClient 是否使用安全套接字层 (SSL) 加密连接,必须在实例身份前面设置                 smtpClient.UseDefaultCredentials = false;                  smtpClient.Credentials = new System.Net.NetworkCredential(mailMessage.From.Address, password);//设置发件人身份的票据                  smtpClient.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;                 smtpClient.Host = "smtp." + mailMessage.From.Host;                 smtpClient.SendCompleted += new SendCompletedEventHandler(CompletedMethod);//注册异步发送邮件完成时的事件                  smtpClient.SendAsync(mailMessage, mailMessage.Body);             }         }         /// <summary>          /// 发送邮件          /// </summary>          public void Send()         {             if (mailMessage != null)             {                 using (smtpClient = new SmtpClient())                 {                     smtpClient.EnableSsl = true;// 指定 System.Net.Mail.SmtpClient 是否使用安全套接字层 (SSL) 加密连接,必须在实例身份前面设置                     smtpClient.UseDefaultCredentials = false;                        smtpClient.Credentials = new System.Net.NetworkCredential(mailMessage.From.Address, password);//设置发件人身份的票据                                smtpClient.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;                     smtpClient.Host = "smtp." + mailMessage.From.Host;                     smtpClient.Send(mailMessage);                     mailMessage.Attachments.Dispose();                 }             }         }     } }

　　调用方法如下：

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using System; using System.Collections.Generic; using System.Linq; using System.Text;   namespace Mail {     class Program     {         static void Main(string[] args)         {             string[] toArr = { "1234567890@qq.com" };             var sbSql=new System.Text.StringBuilder();             sbSql.Append("hauge无敌是多么的寂寞");             SendMail sendmail = new SendMail(toArr, "0123456789@qq.com", sbSql.ToString(), "测试", "QQ邮箱服务授权码");             sendmail.Send();                   }     } }

　这边的QQ邮箱服务授权码，就是上面开通的IMAP/SMTP服务的16位授权码。